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Enhancer (genetics)

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869:, scientists simulated the evolution of DNA sequences to analyze the emergence of features that underly enhancer function. This allowed the design and production of a range of functioning synthetic enhancers for different cell types of the fruit fly brain. A second approach trained artificial intelligence models on single-cell DNA accessibility data and transferred the learned models towards the prediction of enhancers for selected tissues in the fruit fly embryo. These enhancer prediction models were used to design synthetic enhancers for the nervous system, brain, muscle, epidermis and gut. 234: 316:), with one member of the dimer anchored to its binding motif on the enhancer and the other member anchored to its binding motif on the promoter (represented by the red zigzags in the illustration). Several cell function specific transcription factors (there are about 1,600 transcription factors in a human cell) generally bind to specific motifs on an enhancer and a small combination of these enhancer-bound transcription factors, when brought close to a promoter by a DNA loop, govern level of transcription of the target gene. 40: 304:
enhancer DNA regions, for a particular type of tissue only specific enhancers are brought into proximity with the promoters that they regulate. In a study of brain cortical neurons, 24,937 loops were found, bringing enhancers to their target promoters. Multiple enhancers, each often at tens or hundreds of thousands of nucleotides distant from their target genes, loop to their target gene promoters and can coordinate with each other to control the expression of their common target gene.
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gene it regulates). On its own, each enhancer drives nearly identical patterns of gene expression. Are the two enhancers truly redundant? Recent work has shown that multiple enhancers allow fruit flies to survive environmental perturbations, such as an increase in temperature. When raised at an elevated temperature, a single enhancer sometimes fails to drive the complete pattern of expression, whereas the presence of both enhancers permits normal gene expression.
335:. An inactive enhancer may be bound by an inactive transcription factor. Phosphorylation of the transcription factor may activate it and that activated transcription factor may then activate the enhancer to which it is bound (see small red star representing phosphorylation of transcription factor bound to enhancer in the illustration). An activated enhancer begins transcription of its RNA before activating transcription of messenger RNA from its target gene. 562:, yet both species' sequences produce nearly identical patterns of reporter gene expression in zebrafish. Similarly, in highly diverged insects (separated by around 350 million years), similar gene expression patterns of several key genes was found to be regulated through similarly constituted CRMs although these CRMs do not show any appreciable sequence conservation detectable by standard sequence alignment methods such as 33: 645:). The PEE turns on Nodal expression in response to a combination of Wnt signaling plus a second, unknown signal; thus, a member of the LEF/TCF transcription factor family likely binds to a TCF binding site in the cells in the node. Diffusion of Nodal away from the node forms a gradient which then patterns the extending anterior-posterior axis of the embryo. The ASE is an intronic enhancer bound by the 198:, which recruits polymerase II and the general transcription factors which then begin transcribing the genes. Enhancers can also be found within introns. An enhancer's orientation may even be reversed without affecting its function; additionally, an enhancer may be excised and inserted elsewhere in the chromosome, and still affect gene transcription. That is one reason that introns 116:. They can be located up to 1 Mbp (1,000,000 bp) away from the gene, upstream or downstream from the start site. There are hundreds of thousands of enhancers in the human genome. They are found in both prokaryotes and eukaryotes. Active enhancers typically get transcribed as enhancer or regulatory non-coding RNA, whose expression levels correlate with mRNA levels of target genes. 513:, clustering of known or predicted TF-binding sites, and supervised machine-learning approaches trained on known CRMs. All of these methods have proven effective for CRM discovery, but each has its own considerations and limitations, and each is subject to a greater or lesser number of false-positive identifications. In the 596:
transcription factors, thus creating zones within which different combinations of transcription factors are expressed. The pair-rule genes are separated from one another by non-expressing cells. Moreover, the stripes of expression for different pair-rule genes are offset by a few cell diameters from
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Some genes involved in critical developmental processes contain multiple enhancers of overlapping function. Secondary enhancers, or "shadow enhancers", may be found many kilobases away from the primary enhancer ("primary" usually refers to the first enhancer discovered, which is often closer to the
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Enhancers are regions of the genome that are major gene-regulatory elements. Enhancers control cell-type-specific gene expression programs, most often by looping through long distances to come in physical proximity with the promoters of their target genes. While there are hundreds of thousands of
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facilitates remodeling of chromatin in a manner that selectively redistributes cofactors from high-occupancy enhancers, thereby repressing genes involved in maintaining cellular identify whose expression they enhance; at the same time, this F-κB-driven remodeling and redistribution activates other
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An enhancer near the gene GADD45g has been described that may regulate brain growth in chimpanzees and other mammals, but not in humans. The GADD45G regulator in mice and chimps is active in regions of the brain where cells that form the cortex, ventral forebrain, and thalamus are located and may
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shown by a small red star on a transcription factor on the enhancer) the enhancer is activated and can now activate its target promoter. The active enhancer is transcribed on each strand of DNA in opposite directions by bound RNAP IIs. Mediator (a complex consisting of about 26 proteins in an
478:. If the reporter gene integrates near an enhancer, its expression will reflect the expression pattern driven by that enhancer. Thus, staining the flies for LacZ expression or activity and cloning the sequence surrounding the integration site allows the identification of the enhancer sequence. 682:
expression is controlled in the early embryo by an intronic enhancer that binds another forkhead domain transcription factor, FoxA2. Initially the enhancer drives broad gene expression throughout the embryo, but the expression quickly becomes restricted to the endoderm, suggesting that other
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have a leading role in the regulation of gene expression. An enhancer localized in a DNA region distant from the promoter of a gene can have a very large effect on gene expression, with some genes undergoing up to 100-fold increased expression due to an activated enhancer.
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enhancers that guide changes in cellular function through inflammation. As a result, inflammation reprograms cells, altering their interactions with the rest of tissue and with the immune system. In cancer, proteins that control NF-κB activity are dysregulated, permitting
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of genes. Core promoters are sufficient to direct transcription initiation, but generally have low basal activity. Other important cis-regulatory modules are localized in DNA regions that are distant from the transcription start sites. These include enhancers,
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gene produce gene expression in precisely this pattern – the vein spot enhancer drives reporter gene expression in the 12 spots, and the intervein shade enhancer drives reporter expression in the 4 distinct patches. These two enhancers are responsive to the
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one another. Thus, unique combinations of pair-rule gene expression create spatial domains along the anterior-posterior axis to set up each of the 14 individual segments. The 480 bp enhancer responsible for driving the sharp stripe two of the pair-rule gene
127:, provided an explanation for the transcriptional activation of rearranged Vh gene promoters while unrearranged Vh promoters remained inactive. Lately, enhancers have been shown to be involved in certain medical conditions, for example, 554:. Although much evidence has pointed to sequence conservation for critical developmental enhancers, other work has shown that the function of enhancers can be conserved with little or no primary sequence conservation. For example, the 735:
gene involved in posterior limb development in vertebrates. Preliminary genetic analyses indicated that changes in the expression of this gene were responsible for pelvic reduction in sticklebacks. Fish expressing only the freshwater
320:(a complex usually consisting of about 26 proteins in an interacting structure) communicates regulatory signals from enhancer DNA-bound transcription factors directly to the RNA polymerase II (pol II) enzyme bound to the promoter. 307:
The schematic illustration in this section shows an enhancer looping around to come into close physical proximity with the promoter of a target gene. The loop is stabilized by a dimer of a connector protein (e.g. dimer of
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Synthetic regulatory elements such as enhancers promise to be a powerful tool to direct gene products to particular cell types in order to treat disease by activating beneficial genes or by halting aberrant cell states.
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repressors may be involved in its restriction. Late in development, the same enhancer restricts expression to the tissues that will become the stomach and pancreas. An additional enhancer is responsible for maintaining
175:, repress the transcription of the gene. Silencers and enhancers may be in close proximity to each other or may even be in the same region only differentiated by the transcription factor the region binds to. 260:
of the gene. The loop is stabilized by one architectural protein anchored to the enhancer and one anchored to the promoter and these proteins are joined to form a dimer (red zigzags). Specific regulatory
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fish. Sticklebacks exist in both marine and freshwater environments, but sticklebacks in many freshwater populations have completely lost their pelvic fins (appendages homologous to the posterior limb of
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Seen here is a four step diagram depicting the usage of an enhancer. Within this DNA sequence, protein(s) known as transcription factor(s) bind to the enhancer and increase the activity of the promoter.
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can be indicative of enhancers. Sequences from multiple species are aligned, and conserved regions are identified computationally. Identified sequences can then be attached to a reporter gene such as
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do not have pelvic spines, whereas fish expressing a marine allele retain pelvic spines. A more thorough characterization showed that a 500 base pair enhancer sequence is responsible for turning on
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is only expressed in a narrow stripe of cells that contain high concentrations of the activators and low concentration of the repressors for this enhancer sequence. Other enhancer regions drive
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and other DNA-binding proteins in a developing tissue controls which genes will be expressed in that tissue. Enhancers allow the same gene to be used in diverse processes in space and time.
825:". These enhancers contain a large number of binding sites for sequence-specific, inducible transcription factors, and regulate expression of genes involved in cell differentiation. During 1251:
Gillies SD, Morrison SL, Oi VT, Tonegawa S (July 1983). "A tissue-specific transcription enhancer element is located in the major intron of a rearranged immunoglobulin heavy chain gene".
605:) has been well-characterized. The enhancer contains 12 different binding sites for maternal and gap gene transcription factors. Activating and repressing sites overlap in sequence. 668:
is another critical step in animal development. Each of the three germ layers has unique patterns of gene expression that promote their differentiation and development. The
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suppress further neurogenesis. Loss of the GADD45G enhancer in humans may contribute to an increase of certain neuronal populations and to forebrain expansion in humans.
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bind to DNA sequence motifs on the enhancer. General transcription factors bind to the promoter. When a transcription factor is activated by a signal (here indicated as
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Banerji J, Olson L, Schaffner W (July 1983). "A lymphocyte-specific cellular enhancer is located downstream of the joining region in immunoglobulin heavy chain genes".
708:("evo-devo") is investigating the role of enhancers and other cis-regulatory elements in producing morphological changes via developmental differences between species. 4107:
de Almeida BP, Reiter F, Pagani M, Stark A (May 2022). "DeepSTARR predicts enhancer activity from DNA sequence and enables the de novo design of synthetic enhancers".
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de Almeida BP, Reiter F, Pagani M, Stark A (May 2022). "DeepSTARR predicts enhancer activity from DNA sequence and enables the de novo design of synthetic enhancers".
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transcription factor Fox1. Early in development, Fox1-driven Nodal expression establishes the visceral endoderm. Later in development, Fox1 binding to the ASE drives
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as first shown by in vivo competition experiments. Subsequently, molecular studies showed direct interactions with transcription factors and cofactors, including the
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Norris DP, Brennan J, Bikoff EK, Robertson EJ (July 2002). "The Foxh1-dependent autoregulatory enhancer controls the level of Nodal signals in the mouse embryo".
489:(NGS) methods now enable high-throughput functional CRM discovery assays, and the vastly increasing amounts of available data, including large-scale libraries of 357:
Flexible billboards – less integrative, multiple proteins independently regulate gene expression and their sum is read in by the basal transcriptional machinery.
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Scholer H, Haslinger A, Heguy A, Holtgreve H, Karin M (April 1986). "In vivo competition between a metallothionein regulatory element and the SV40 enhancer".
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techniques using a reporter gene or by comparative sequence analysis and computational genomics. In genetically tractable models such as the fruit fly
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gene contains two enhancers: the Proximal Epiblast Enhancer (PEE) and the Asymmetric Enhancer (ASE). The PEE is upstream of the Nodal gene and drives
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strategies have led to a better understanding of the features of regulatory DNA sequences, the prediction, and the design of synthetic enhancers.
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Enhancers, when active, are generally transcribed from both strands of DNA with RNA polymerases acting in two different directions, producing two
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Pigmentation patterns provide one of the most striking and easily scored differences between different species of animals. Pigmentation of the
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Mercola M, Goverman J, Mirell C, Calame K (January 1985). "Immunoglobulin heavy-chain enhancer requires one or more tissue-specific factors".
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expression in the pelvic spines in isolated freshwater population, and without this enhancer, freshwater fish fail to develop pelvic spines.
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superfamily ligand, is a key gene involved in patterning both the anterior-posterior axis and the left-right axis of the early embryo. The
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Spilianakis CG, Lalioti MD, Town T, Lee GR, Flavell RA (June 2005). "Interchromosomal associations between alternatively expressed loci".
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Each cell typically contains several hundred of a special class of enhancers that stretch over many kilobases long DNA sequences, called "
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data across many cell types, are making accurate computational CRM discovery an attainable goal. An example of NGS-based approach called
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Mercola M, Wang XF, Olsen J, Calame K (August 1983). "Transcriptional enhancer elements in the mouse immunoglobulin heavy chain locus".
3482:"Direct transcriptional regulation of Gata4 during early endoderm specification is controlled by FoxA2 binding to an intronic enhancer" 501:
have enabled identification of nucleosome-depleted, or open chromatin regions, which can contain CRM. More recently techniques such as
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have been developed which require less starting material. Nucelosome depleted regions can be identified in vivo through expression of
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Werner T, Koshikawa S, Williams TM, Carroll SB (April 2010). "Generation of a novel wing colour pattern by the Wingless morphogen".
3853:"Acute TNF-induced repression of cell identity genes is mediated by NFκB-directed redistribution of cofactors from super-enhancers" 4252: 4398: 171:
in the eukaryotic genome. Silencers are antagonists of enhancers that, when bound to its proper transcription factors called
3398:"Nodal cis-regulatory elements reveal epiblast and primitive endoderm heterogeneity in the peri-implantation mouse embryo" 865:
Building on work in cell culture, synthetic enhancers were successfully applied to entire living organisms in 2023. Using
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wing has proven to be a particularly amenable system for studying the development of complex pigmentation phenotypes. The
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interacting structure) communicates regulatory signals from the enhancer DNA-bound transcription factors to the promoter.
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to design synthetic enhancers and applied them in animal systems, first in a cell line, and one year later also in vivo.
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wing has 12 dark pigmentation spots and 4 lighter gray intervein patches. Pigment spots arise from expression of the
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transcription factors are responsible for activating and repressing a number of segmentation genes, such as the
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upstream or downstream of the start site. Enhancers do not act on the promoter region itself, but are bound by
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Chatterjee B, Banoth B, Mukherjee T, Taye N, Vijayaragavan B, Chattopadhyay S, et al. (December 2016).
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Schoenfelder S, Fraser P (August 2019). "Long-range enhancer-promoter contacts in gene expression control".
509:, allowing for greater control of cell-type specific enhancer identification. Computational methods include 752:—a sequence of DNA that is likely to be broken and thus more likely to be mutated as a result of imprecise 160: 3281:"Evidence for Deep Regulatory Similarities in Early Developmental Programs across Highly Diverged Insects" 481:
The development of genomic and epigenomic technologies, however, has dramatically changed the outlook for
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Burren OS, Rubio García A, Javierre BM, Rainbow DB, Cairns J, Cooper NJ, et al. (4 September 2017).
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The development, differentiation and growth of cells and tissues require precisely regulated patterns of
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on two legs". Evidence to date shows that of the 110,000 gene enhancer sequences identified in the human
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DNA, so although the enhancer DNA may be far from the gene in a linear way, it is spatially close to the
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Hartenstein V, Jan YN (June 1992). "Studying Drosophila embryogenesis with P-lacZ enhancer trap lines".
4278: 4194: 3130:"CATaDa reveals global remodelling of chromatin accessibility during stem cell differentiation in vivo" 2818:"MAP kinase phosphorylation-dependent activation of Elk-1 leads to activation of the co-activator p300" 2427:"Three-dimensional genome restructuring across timescales of activity-induced neuronal gene expression" 120: 2865:
Carullo NV, Phillips Iii RA, Simon RC, Soto SA, Hinds JE, Salisbury AJ, et al. (September 2020).
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Taskiran II, Spanier KI, Dickmänken H, Kempynck N, Pančíková A, Ekşi EC, et al. (February 2024).
592:. The gap genes are expressed in blocks along the anterior-posterior axis of the fly along with other 4475: 4411: 4381: 4359: 2718:
Mikhaylichenko O, Bondarenko V, Harnett D, Schor IE, Males M, Viales RR, et al. (January 2018).
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Establishing body axes is a critical step in animal development. During mouse embryonic development,
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As of 2005, there are two different theories on the information processing that occurs on enhancers:
17: 756:. This fragile site has caused repeated, independent losses of the enhancer responsible for driving 4695: 4269: 4261: 4198: 3396:
Granier C, Gurchenkov V, Perea-Gomez A, Camus A, Ott S, Papanayotou C, et al. (January 2011).
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complex of DNA is folded in a way that functionally mimics the supercoiled state characteristic of
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initiation site to affect transcription, as some have been found located several hundred thousand
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expression at all of the pigmented locations. Thus, in the evolution of the complex pigmentation
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Blackwood EM, Kadonaga JT (July 1998). "Going the distance: a current view of enhancer action".
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Parker SC, Stitzel ML, Taylor DL, Orozco JM, Erdos MR, Akiyama JA, et al. (October 2013).
2065:"Genome-wide mapping of HATs and HDACs reveals distinct functions in active and inactive genes" 1359:
Zhigulev A, Norberg Z, Cordier J, Spalinskas R, Bassereh H, Björn N, et al. (March 2024).
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embryos are among the best characterized developmental enhancers. In the early fly embryo, the
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McLean CY, Reno PL, Pollen AA, Bassan AI, Capellini TD, Guenther C, et al. (March 2011).
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Avsec Ž, Weilert M, Shrikumar A, Krueger S, Alexandari A, Dalal K, et al. (March 2021).
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Vlahopoulos SA, Cen O, Hengen N, Agan J, Moschovi M, Critselis E, et al. (August 2015).
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Chan YF, Marks ME, Jones FC, Villarreal G, Shapiro MD, Brady SD, et al. (January 2010).
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Weintraub AS, Li CH, Zamudio AV, Sigova AA, Hannett NM, Day DS, et al. (December 2017).
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and tethering elements. Among this constellation of elements, enhancers and their associated
203: 2114:"Histone modifications at human enhancers reflect global cell-type-specific gene expression" 1865:"Exonic remnants of whole-genome duplication reveal cis-regulatory function of coding exons" 1814:
Ramasamy S, Aljahani A, Karpinska MA, Cao TB, Velychko T, Cruz JN, et al. (July 2023).
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2) is a gene enhancer "that may have contributed to the evolution of the uniquely opposable
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Brown JD, Lin CY, Duan Q, Griffin G, Federation A, Paranal RM, et al. (October 2014).
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in specific cells and/or repressing it in other cells. Thus, the particular combination of
292: 262: 191: 106: 94: 4057:"Brd4 maintains constitutively active NF-κB in cancer cells by binding to acetylated RelA" 3284: 2112:
Heintzman ND, Hon GC, Hawkins RD, Kheradpour P, Stark A, Harp LF, et al. (May 2009).
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Smemo S, Tena JJ, Kim KH, Gamazon ER, Sakabe NJ, Gómez-Marín C, et al. (March 2014).
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Recent work has investigated the role of enhancers in morphological changes in threespine
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Beagan JA, Pastuzyn ED, Fernandez LR, Guo MH, Feng K, Titus KR, et al. (June 2020).
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Lambert SA, Jolma A, Campitelli LF, Das PK, Yin Y, Albu M, et al. (February 2018).
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of the gene it regulates. Furthermore, an enhancer does not need to be located near the
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Vahedi G, Kanno Y, Furumoto Y, Jiang K, Parker SC, Erdos MR, et al. (April 2015).
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1889: 1864: 1646: 1613: 1594: 1336: 1295: 1276: 1230: 1139: 1104: 1080: 1055: 1036: 982: 957: 931: 518: 156: 3373: 3348: 2842: 2817: 1791: 1756: 1448:"Targeted design of synthetic enhancers for selected tissues in the Drosophila embryo" 1105:"Chromosome contacts in activated T cells identify autoimmune disease candidate genes" 4637: 4173: 4124: 4086: 4037: 3988: 3931: 3882: 3833: 3784: 3725: 3668: 3625: 3568: 3511: 3454: 3419: 3378: 3329: 3262: 3210: 3161: 3102: 3067: 3018: 2938: 2896: 2847: 2798: 2749: 2700: 2651: 2592: 2551: 2506: 2494: 2456: 2408: 2396: 2357: 2306: 2257: 2208: 2151: 2094: 2037: 1994: 1943: 1894: 1845: 1796: 1737: 1694: 1651: 1586: 1545: 1485: 1425: 1390: 1341: 1268: 1264: 1222: 1218: 1187: 1144: 1126: 1085: 1028: 987: 923: 859: 253: 164: 3466: 3114: 2950: 1598: 1280: 1234: 1040: 935: 838:
to decrease their dependence on interactions with local tissue, and hindering their
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DNA sequence that binds activators to increase the likelihood of gene transcription
4023: 3804:"NF-κB directs dynamic super enhancer formation in inflammation and atherogenesis" 2981:"Human-specific loss of regulatory DNA and the evolution of human-specific traits" 2816:
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pattern of gene expression produced by the enhancer when injected into an embryo.
4423: 4144:"Base-resolution models of transcription-factor binding reveal soft motif syntax" 3851:
Schmidt SF, Larsen BD, Loft A, Nielsen R, Madsen JG, Mandrup S (September 2015).
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Proceedings of the National Academy of Sciences of the United States of America
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Proceedings of the National Academy of Sciences of the United States of America
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Proceedings of the National Academy of Sciences of the United States of America
1531: 1471: 1421: 835: 822: 642: 486: 350:– rely on highly cooperative, coordinated action and can be disabled by single 332: 240:. An active enhancer regulatory region of DNA is enabled to interact with the 168: 39: 3917: 3554: 3053: 2916:"Transcriptional enhancers: Intelligent enhanceosomes or flexible billboards?" 2610:
Grossman SR, Engreitz J, Ray JP, Nguyen TH, Hacohen N, Lander ES (July 2018).
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expression in the endoderm during the intermediate stages of gut development.
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Aughey GN, Estacio Gomez A, Thomson J, Yin H, Southall TD (February 2018).
3106: 3071: 3022: 2942: 2900: 2851: 2833: 2802: 2753: 2735: 2704: 2655: 2596: 2555: 2498: 2460: 2400: 2361: 2310: 2261: 2212: 2155: 2098: 2041: 1998: 1947: 1898: 1849: 1800: 1655: 1590: 1549: 1489: 1429: 1394: 1376: 1345: 1148: 1089: 1032: 991: 826: 665: 347: 324: 3951:"Super-enhancers delineate disease-associated regulatory nodes in T cells" 3868: 2882: 1929: 1880: 1741: 1698: 1272: 1226: 1191: 927: 435:
to mediate both spatial and temporal control of development by turning on
4522: 4490: 4393: 4072: 1071: 720: 661: 407: 152: 4055:
Zou Z, Huang B, Wu X, Zhang H, Qi J, Bradner J, et al. (May 2014).
3974: 3664: 3146: 3004: 2326:"The Why of YY1: Mechanisms of Transcriptional Regulation by Yin Yang 1" 2194: 2137: 2033: 1637: 956:
Pennacchio LA, Bickmore W, Dean A, Nobrega MA, Bejerano G (April 2013).
4674: 4368: 4323: 4313: 4308: 4303: 4298: 3315: 3098: 753: 558:
enhancers in humans have very little sequence conservation to those in
494: 211: 187: 144: 4102: 4100: 3181:"Identifying transcriptional cis-regulatory modules in animal genomes" 2934: 690: 4330: 3196: 1246: 1244: 809:
pigment gene evolved enhancers responsive to the wingless signal and
802: 748:
expression in the posterior fin bud. This enhancer is located near a
559: 498: 472: 403: 172: 148: 82: 2717: 2686: 2392: 2171:"ChIP-seq accurately predicts tissue-specific activity of enhancers" 1914:"Coding exons function as tissue-specific enhancers of nearby genes" 1757:"Association of the Mediator complex with enhancers of active genes" 1056:"Distant activation of transcription: mechanisms of enhancer action" 973: 813:
expression evolved at new locations to produce novel wing patterns.
4537: 4527: 4097: 2323: 2243: 1294:
Hauptman G, Reichert MC, Abdal Rhida MA, Evans TA (December 2022).
732: 669: 654: 585: 502: 74: 3480:
Rojas A, Schachterle W, Xu SM, Martín F, Black BL (October 2010).
1241: 830: 4497: 4364: 3395: 1505: 1102: 1053: 785: 678:
expression, and Gata4 goes on to direct gut morphogenesis later.
210:
region of an unrelated gene and they may act on genes on another
90: 1358: 1293: 32: 4293: 3531:"Shadow enhancers foster robustness of Drosophila gastrulation" 1816:"The Mediator complex regulates enhancer-promoter interactions" 737: 641:
that will differentiate into the node (also referred to as the
399: 372: 124: 4214: 3642: 3529:
Perry MW, Boettiger AN, Bothma JP, Levine M (September 2010).
1862: 1711: 4554: 4406: 4209: 3899: 3127: 2671:"The Mediator complex: a central integrator of transcription" 2228:"ChIP-Seq identification of weakly conserved heart enhancers" 2111: 1445: 955: 727: 674: 622: 506: 387: 383: 380: 354:
that move or remove the binding sites of individual proteins.
4141: 3436: 2864: 2767:
Yao L, Liang J, Ozer A, Leung AK, Lis JT, Yu H (July 2022).
2324:
Verheul TC, van Hijfte L, Perenthaler E, Barakat TS (2020).
1813: 4625: 4455: 4386: 4106: 1668: 1407: 845: 468: 464: 395: 391: 309: 245: 207: 102: 3528: 2522:"YY1 Is a Structural Regulator of Enhancer-Promoter Loops" 2424: 493:, collections of annotated, validated CRMs, and extensive 248:
by the formation of a chromosome loop. This can initiate
4260: 3742: 2609: 2568: 2011: 1565:"Transcriptional regulatory elements in the human genome" 1250: 1007:"Transcriptional regulatory elements in the human genome" 313: 86: 4005: 3948: 3850: 3693: 3585: 3479: 2519: 699: 119:
The first discovery of a eukaryotic enhancer was in the
1911: 763: 3233:"Enhancer identification through comparative genomics" 3230: 3185:
Wiley Interdisciplinary Reviews. Developmental Biology
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will occur. These proteins are usually referred to as
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Borok MJ, Tran DA, Ho MC, Drewell RA (January 2010).
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of humans following the split with the ancestors of
3801: 3231:Visel A, Bristow J, Pennacchio LA (February 2007). 3036:Barrett LW, Fletcher S, Wilton SD (November 2012). 2225: 1960: 1905: 1755:Kuras L, Borggrefe T, Kornberg RD (November 2003). 1611: 691:
Multiple enhancers promote developmental robustness
471:can be randomly integrated into the genome using a 3297: 2476: 2062: 1508:"Cell-type-directed design of synthetic enhancers" 788:. Recent work has shown that two enhancers in the 402:, HACNS1 has undergone the most change during the 123:gene in 1983. This enhancer, located in the large 2815: 2766: 897: 653:expression on the left side of the lateral plate 4687: 3178: 2168: 1563:Maston GA, Evans SK, Green MR (1 January 2006). 1562: 1004: 537:expression of the reporter can be visualized by 274:Gene expression in mammals is regulated by many 4054: 3346: 2913: 2472: 2470: 1501: 1499: 1441: 1439: 491:transcription factor-binding site (TFBS) motifs 361: 3283:. Genome Biology and Evolution. Archived from 3084: 462:for example, a reporter construct such as the 159:and gene. This allows it to interact with the 4246: 1963:"De novo genesis of enhancers in vertebrates" 816: 613:expression in 6 other stripes in the embryo. 569: 331:, these eRNAs are usually protected by their 280:core promoters and promoter-proximal elements 3237:Seminars in Cell & Developmental Biology 3226: 3224: 2858: 2809: 2711: 2668: 2662: 2603: 2562: 2513: 2467: 2374: 2368: 2317: 2274: 2268: 1961:Eichenlaub MP, Ettwiller L (November 2011). 1569:Annual Review of Genomics and Human Genetics 1496: 1436: 1401: 1011:Annual Review of Genomics and Human Genetics 951: 949: 947: 945: 451:Traditionally, enhancers were identified by 2330:Frontiers in Cell and Developmental Biology 1705: 1296:"Characterization of enhancer fragments in 616: 422: 327:(eRNAs) as illustrated in the Figure. Like 4253: 4239: 4222:Enhancer discovery and characterization. 228: 4197:at the U.S. National Library of Medicine 4167: 4080: 4031: 3982: 3925: 3876: 3827: 3778: 3768: 3719: 3619: 3562: 3505: 3413: 3372: 3323: 3256: 3221: 3204: 3155: 3145: 3061: 3012: 2890: 2841: 2792: 2743: 2694: 2645: 2635: 2586: 2545: 2450: 2420: 2418: 2351: 2341: 2300: 2251: 2202: 2145: 2088: 1988: 1978: 1937: 1888: 1839: 1820:Nature Structural & Molecular Biology 1790: 1780: 1645: 1580: 1539: 1479: 1384: 1335: 1325: 1315: 1138: 1120: 1079: 1022: 981: 942: 386:, and possibly also modifications in the 3087:Roux's Archives of Developmental Biology 846:Designing enhancers in synthetic biology 232: 38: 31: 256:(RNAP II) bound to the promoter at the 221:and their location can be predicted by 202:may have effects although they are not 14: 4688: 2914:Arnosti DN, Kulkarni MM (April 2005). 2675:Nature Reviews. Molecular Cell Biology 2415: 2281:Nature Reviews. Molecular Cell Biology 1005:Maston GA, Evans SK, Green MR (2006). 238:Regulation of transcription in mammals 4399:Histone acetylation and deacetylation 4234: 3347:Norris DP, Robertson EJ (June 1999). 1582:10.1146/annurev.genom.7.080505.115623 1024:10.1146/annurev.genom.7.080505.115623 958:"Enhancers: five essential questions" 700:Evolution of developmental mechanisms 672:is specified early in development by 225:against this family of coactivators. 206:. Enhancers can also be found at the 4012:Cytokine & Growth Factor Reviews 3042:Cellular and Molecular Life Sciences 2005: 711: 167:. The same mechanism holds true for 2907: 2669:Allen BL, Taatjes DJ (March 2015). 2275:Haberle V, Stark A (October 2018). 784:gene, whose product produces black 447:Identification and characterization 131:. Since 2022, scientists have used 24: 706:evolutionary developmental biology 97:) to increase the likelihood that 25: 4707: 4188: 2571:"The Human Transcription Factors" 840:surveillance by the immune system 637:expression in the portion of the 3179:Suryamohan K, Halfon MS (2014). 2923:Journal of Cellular Biochemistry 574:The enhancers determining early 4603:Archaeal transcription factor B 4135: 4048: 3999: 3942: 3893: 3844: 3795: 3736: 3687: 3636: 3579: 3522: 3473: 3430: 3389: 3340: 3291: 3273: 3172: 3121: 3078: 3029: 2972: 2760: 2219: 2162: 2105: 2056: 1954: 1856: 1807: 1748: 1662: 1605: 1556: 1352: 627:transforming growth factor-beta 60:Transcription Activator Protein 1287: 1198: 1155: 1096: 1060:Molecular and Cellular Biology 1047: 998: 891: 13: 1: 4024:10.1016/j.cytogfr.2015.06.001 1327:10.1080/19336934.2022.2126259 884: 161:general transcription factors 3820:10.1016/j.molcel.2014.08.024 3249:10.1016/j.semcdb.2006.12.014 1980:10.1371/journal.pbio.1001188 1265:10.1016/0092-8674(83)90014-4 1219:10.1016/0092-8674(83)90015-6 362:Examples in the human genome 138: 7: 3498:10.1016/j.ydbio.2010.07.032 3415:10.1016/j.ydbio.2010.10.036 920:10.1126/science.281.5373.60 872: 829:, the transcription factor 338: 178:An enhancer may be located 147:cells the structure of the 10: 4712: 4279:Transcriptional regulation 4160:10.1038/s41588-021-00782-6 4121:10.1038/s41588-022-01048-5 3712:10.1016/j.cell.2013.03.035 2785:10.1038/s41587-022-01211-7 2588:10.1016/j.cell.2018.01.029 2538:10.1016/j.cell.2017.11.008 2081:10.1016/j.cell.2009.06.049 1832:10.1038/s41594-023-01027-2 1532:10.1038/s41586-023-06936-2 1472:10.1038/s41586-023-06905-9 1422:10.1038/s41588-022-01048-5 817:In inflammation and cancer 570:In segmentation of insects 487:Next-generation sequencing 413: 282:that are located near the 121:immunoglobulin heavy chain 4646: 4611: 4585: 4510: 4476:Transcription coregulator 4468: 4445: 4422: 4412:Histone acetyltransferase 4382:Histone methyltransferase 4360:Histone-modifying enzymes 4358: 4351: 4286: 4277: 4195:Enhancer+Elements,Genetic 3918:10.1126/scisignal.aaf1129 3555:10.1016/j.cub.2010.07.043 3054:10.1007/s00018-012-0990-9 2491:10.1038/s41576-019-0128-0 2443:10.1038/s41593-020-0634-6 2343:10.3389/fcell.2020.592164 2293:10.1038/s41580-018-0028-8 1317:10.1101/2022.08.01.502399 1122:10.1186/s13059-017-1285-0 704:One theme of research in 529:or lacZ to determine the 527:green fluorescent protein 366: 284:transcription start sites 244:DNA region of its target 4199:Medical Subject Headings 2479:Nature Reviews. Genetics 2381:Nature Reviews. Genetics 962:Nature Reviews. Genetics 797:, which is activated by 750:chromosomal fragile site 617:In vertebrate patterning 423:In developmental biology 377:Human Accelerated Region 258:transcription start site 4577:Internal control region 4220:ENCODE threads explorer 3770:10.1073/pnas.1317023110 3612:10.1126/science.1182213 3451:10.1242/dev.129.14.3455 3353:Genes & Development 2724:Genes & Development 2637:10.1073/pnas.1804663115 1782:10.1073/pnas.2036346100 1734:10.1126/science.3006253 1691:10.1126/science.3917575 1184:10.1126/science.6306772 856:artificial intelligence 581:Drosophila melanogaster 458:Drosophila melanogaster 433:cis-regulatory elements 276:cis-regulatory elements 229:Role in gene expression 217:Enhancers are bound by 133:artificial intelligence 3365:10.1101/gad.13.12.1575 2871:Nucleic Acids Research 2736:10.1101/gad.308619.117 1869:Nucleic Acids Research 1377:10.26508/lsa.202302244 768:wing pattern evolution 483:cis-regulatory modules 371:HACNS1 (also known as 271: 180:upstream or downstream 70: 36: 4670:Intrinsic termination 4435:DNA methyltransferase 3869:10.1101/gr.188300.114 3486:Developmental Biology 3402:Developmental Biology 1930:10.1101/gr.133546.111 1365:Life Science Alliance 795:Wnt signaling pathway 519:sequence conservation 441:transcription factors 394:that allow humans to 297:transcription factors 263:transcription factors 236: 107:transcription factors 89:that can be bound by 42: 35: 4447:Chromatin remodeling 4073:10.1038/onc.2013.179 2834:10.1093/emboj/cdg028 2773:Nature Biotechnology 2532:(7): 1573–1588.e28. 1072:10.1128/MCB.01127-12 867:deep neural networks 778:Drosophila guttifera 515:comparative genomics 511:comparative genomics 431:. Enhancers work as 252:(mRNA) synthesis by 81:is a short (50–1500 4404:Histone deacetylase 4394:Histone demethylase 4378:Histone methylation 3975:10.1038/nature14154 3967:2015Natur.520..558V 3761:2013PNAS..11017921P 3755:(44): 17921–17926. 3665:10.1038/nature08896 3657:2010Natur.464.1143W 3651:(7292): 1143–1148. 3604:2010Sci...327..302C 3547:2010CBio...20.1562P 3147:10.7554/eLife.32341 3005:10.1038/nature09774 2997:2011Natur.471..216M 2883:10.1093/nar/gkaa671 2628:2018PNAS..115E7222G 2622:(30): E7222–E7230. 2431:Nature Neuroscience 2195:10.1038/nature07730 2187:2009Natur.457..854V 2138:10.1038/nature07829 2130:2009Natur.459..108H 2034:10.1038/nature03574 2026:2005Natur.435..637S 1881:10.1093/nar/gkp1124 1773:2003PNAS..10013887K 1767:(24): 13887–13891. 1726:1986Sci...232...76S 1683:1985Sci...227..266M 1638:10.1038/nature13138 1630:2014Natur.507..371S 1524:2024Natur.626..212T 1464:2024Natur.626..207D 1176:1983Sci...221..663M 912:1998Sci...281...60. 660:Establishing three 375:and located in the 3316:10.1242/dev.036160 3099:10.1007/BF00188752 523:non-coding regions 272: 192:activator proteins 71: 37: 4683: 4682: 4638:RNA polymerase II 4506: 4505: 4464: 4463: 4067:(18): 2395–2404. 3961:(7548): 558–562. 3906:Science Signaling 3598:(5963): 302–305. 3541:(17): 1562–1567. 3445:(14): 3455–3468. 3359:(12): 1575–1588. 3048:(21): 3613–3634. 2991:(7337): 216–219. 2935:10.1002/jcb.20352 2877:(17): 9550–9570. 2181:(7231): 854–858. 2124:(7243): 108–112. 2020:(7042): 637–645. 1677:(4684): 266–270. 1624:(7492): 371–375. 1518:(7997): 212–220. 1458:(7997): 207–211. 1371:(3): e202302244. 1170:(4611): 663–665. 1066:(24): 4892–4897. 860:transfer learning 485:(CRM) discovery. 254:RNA polymerase II 165:RNA polymerase II 16:(Redirected from 4703: 4560:Response element 4543:Response element 4356: 4355: 4284: 4283: 4255: 4248: 4241: 4232: 4231: 4182: 4181: 4171: 4139: 4133: 4132: 4104: 4095: 4094: 4084: 4052: 4046: 4045: 4035: 4003: 3997: 3996: 3986: 3946: 3940: 3939: 3929: 3897: 3891: 3890: 3880: 3863:(9): 1281–1294. 3848: 3842: 3841: 3831: 3799: 3793: 3792: 3782: 3772: 3740: 3734: 3733: 3723: 3691: 3685: 3684: 3640: 3634: 3633: 3623: 3583: 3577: 3576: 3566: 3526: 3520: 3519: 3509: 3477: 3471: 3470: 3434: 3428: 3427: 3417: 3393: 3387: 3386: 3376: 3344: 3338: 3337: 3327: 3295: 3289: 3288: 3287:on 10 July 2015. 3277: 3271: 3270: 3260: 3228: 3219: 3218: 3208: 3197:10.1002/wdev.168 3176: 3170: 3169: 3159: 3149: 3125: 3119: 3118: 3082: 3076: 3075: 3065: 3033: 3027: 3026: 3016: 2976: 2970: 2969: 2967: 2965: 2959: 2953:. Archived from 2920: 2911: 2905: 2904: 2894: 2862: 2856: 2855: 2845: 2822:The EMBO Journal 2813: 2807: 2806: 2796: 2779:(7): 1056–1065. 2764: 2758: 2757: 2747: 2715: 2709: 2708: 2698: 2666: 2660: 2659: 2649: 2639: 2607: 2601: 2600: 2590: 2566: 2560: 2559: 2549: 2517: 2511: 2510: 2474: 2465: 2464: 2454: 2422: 2413: 2412: 2372: 2366: 2365: 2355: 2345: 2321: 2315: 2314: 2304: 2272: 2266: 2265: 2255: 2223: 2217: 2216: 2206: 2166: 2160: 2159: 2149: 2109: 2103: 2102: 2092: 2075:(5): 1019–1031. 2060: 2054: 2053: 2009: 2003: 2002: 1992: 1982: 1973:(11): e1001188. 1958: 1952: 1951: 1941: 1924:(6): 1059–1068. 1909: 1903: 1902: 1892: 1875:(4): 1071–1085. 1860: 1854: 1853: 1843: 1811: 1805: 1804: 1794: 1784: 1752: 1746: 1745: 1709: 1703: 1702: 1666: 1660: 1659: 1649: 1609: 1603: 1602: 1584: 1560: 1554: 1553: 1543: 1503: 1494: 1493: 1483: 1443: 1434: 1433: 1405: 1399: 1398: 1388: 1356: 1350: 1349: 1339: 1329: 1319: 1298:Drosophila robo2 1291: 1285: 1284: 1248: 1239: 1238: 1202: 1196: 1195: 1159: 1153: 1152: 1142: 1124: 1100: 1094: 1093: 1083: 1051: 1045: 1044: 1026: 1002: 996: 995: 985: 953: 940: 939: 895: 879:Shadow enhancers 647:fork head domain 639:primitive streak 196:mediator complex 129:myelosuppression 109:. Enhancers are 101:of a particular 63:Mediator Protein 21: 4711: 4710: 4706: 4705: 4704: 4702: 4701: 4700: 4696:Gene expression 4686: 4685: 4684: 4679: 4654: 4648: 4642: 4607: 4581: 4502: 4460: 4441: 4424:DNA methylation 4418: 4362: 4347: 4273: 4259: 4191: 4186: 4185: 4148:Nature Genetics 4140: 4136: 4109:Nature Genetics 4105: 4098: 4053: 4049: 4004: 4000: 3947: 3943: 3898: 3894: 3857:Genome Research 3849: 3845: 3800: 3796: 3741: 3737: 3692: 3688: 3641: 3637: 3584: 3580: 3535:Current Biology 3527: 3523: 3478: 3474: 3435: 3431: 3394: 3390: 3345: 3341: 3296: 3292: 3279: 3278: 3274: 3229: 3222: 3177: 3173: 3126: 3122: 3083: 3079: 3034: 3030: 2977: 2973: 2963: 2961: 2960:on 21 July 2006 2957: 2918: 2912: 2908: 2863: 2859: 2814: 2810: 2765: 2761: 2716: 2712: 2687:10.1038/nrm3951 2667: 2663: 2608: 2604: 2567: 2563: 2518: 2514: 2475: 2468: 2423: 2416: 2393:10.1038/nrg3207 2373: 2369: 2322: 2318: 2287:(10): 621–637. 2273: 2269: 2232:Nature Genetics 2224: 2220: 2167: 2163: 2110: 2106: 2061: 2057: 2010: 2006: 1959: 1955: 1918:Genome Research 1910: 1906: 1861: 1857: 1826:(7): 991–1000. 1812: 1808: 1753: 1749: 1720:(4746): 76–80. 1710: 1706: 1667: 1663: 1610: 1606: 1561: 1557: 1504: 1497: 1444: 1437: 1410:Nature Genetics 1406: 1402: 1357: 1353: 1292: 1288: 1249: 1242: 1203: 1199: 1160: 1156: 1101: 1097: 1052: 1048: 1003: 999: 974:10.1038/nrg3458 954: 943: 906:(5373): 60–63. 896: 892: 887: 875: 848: 836:malignant cells 823:super-enhancers 819: 770: 725: 717: 702: 693: 619: 594:maternal effect 590:pair rule genes 572: 552:protein folding 449: 429:gene expression 425: 416: 369: 364: 352:point mutations 341: 267:phosphorylation 231: 141: 69: 28: 23: 22: 15: 12: 11: 5: 4709: 4699: 4698: 4681: 4680: 4678: 4677: 4672: 4667: 4661: 4659: 4644: 4643: 4641: 4640: 4634:RNA polymerase 4628: 4622:RNA polymerase 4615: 4613: 4609: 4608: 4606: 4605: 4600: 4595: 4589: 4587: 4583: 4582: 4580: 4579: 4574: 4569: 4564: 4563: 4562: 4557: 4547: 4546: 4545: 4540: 4535: 4530: 4525: 4514: 4512: 4508: 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2437:(6): 707–717. 2414: 2387:(9): 613–626. 2367: 2316: 2267: 2244:10.1038/ng.650 2238:(9): 806–810. 2218: 2161: 2104: 2055: 2004: 1953: 1904: 1855: 1806: 1747: 1704: 1661: 1604: 1555: 1495: 1435: 1416:(5): 613–624. 1400: 1351: 1310:(1): 312–346. 1286: 1259:(3): 717–728. 1240: 1213:(3): 729–740. 1197: 1154: 1109:Genome Biology 1095: 1046: 997: 968:(4): 288–295. 941: 889: 888: 886: 883: 882: 881: 874: 871: 847: 844: 818: 815: 769: 762: 716: 710: 701: 698: 692: 689: 643:primitive node 618: 615: 571: 568: 448: 445: 424: 421: 415: 412: 368: 365: 363: 360: 359: 358: 355: 340: 337: 230: 227: 140: 137: 68: 67: 66:RNA Polymerase 64: 61: 58: 55: 52: 49: 45: 26: 9: 6: 4: 3: 2: 4708: 4697: 4694: 4693: 4691: 4676: 4673: 4671: 4668: 4666: 4663: 4662: 4660: 4657: 4652: 4645: 4639: 4635: 4632: 4629: 4627: 4623: 4620: 4617: 4616: 4614: 4610: 4604: 4601: 4599: 4596: 4594: 4591: 4590: 4588: 4584: 4578: 4575: 4573: 4570: 4568: 4565: 4561: 4558: 4556: 4553: 4552: 4551: 4548: 4544: 4541: 4539: 4536: 4534: 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