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  • *Gene Expression Regulation  (2)
  • *Chromosomes, Human/chemistry/ultrastructure  (1)
  • *Encyclopedias as Topic  (1)
  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2004-10-23
    Description: When considering the daunting complexity of eukaryotic genomes, some comfort can be found in the fact that the human genome may contain only 30,000 to 40,000 genes. Moreover, growing evidence suggests that genomes may be organized in such a way as to take advantage of space. A gene's location in the linear DNA sequence and its position in the three-dimensional nucleus can both be important in its regulation. Contrary to prevailing notions in this postgenomic era, the bacteriophage lambda, a paragon of simplicity, may still have a few things to teach us with respect to these facets of nonrandom genomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kosak, Steven T -- Groudine, Mark -- New York, N.Y. -- Science. 2004 Oct 22;306(5696):644-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Basic Sciences, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15499009" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacteriophage lambda/genetics ; Cell Cycle ; Cell Nucleus/physiology ; Chromosomes/genetics/physiology ; Chromosomes, Human/genetics/physiology ; *Gene Expression Regulation ; Gene Expression Regulation, Viral ; *Gene Order ; *Genome ; Genome, Human ; Genome, Viral ; Humans ; Multigene Family ; Transcription Factors/metabolism ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2012-09-08
    Description: Regulatory factor binding to genomic DNA protects the underlying sequence from cleavage by DNase I, leaving nucleotide-resolution footprints. Using genomic DNase I footprinting across 41 diverse cell and tissue types, we detected 45 million transcription factor occupancy events within regulatory regions, representing differential binding to 8.4 million distinct short sequence elements. Here we show that this small genomic sequence compartment, roughly twice the size of the exome, encodes an expansive repertoire of conserved recognition sequences for DNA-binding proteins that nearly doubles the size of the human cis-regulatory lexicon. We find that genetic variants affecting allelic chromatin states are concentrated in footprints, and that these elements are preferentially sheltered from DNA methylation. High-resolution DNase I cleavage patterns mirror nucleotide-level evolutionary conservation and track the crystallographic topography of protein-DNA interfaces, indicating that transcription factor structure has been evolutionarily imprinted on the human genome sequence. We identify a stereotyped 50-base-pair footprint that precisely defines the site of transcript origination within thousands of human promoters. Finally, we describe a large collection of novel regulatory factor recognition motifs that are highly conserved in both sequence and function, and exhibit cell-selective occupancy patterns that closely parallel major regulators of development, differentiation and pluripotency.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3736582/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3736582/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Neph, Shane -- Vierstra, Jeff -- Stergachis, Andrew B -- Reynolds, Alex P -- Haugen, Eric -- Vernot, Benjamin -- Thurman, Robert E -- John, Sam -- Sandstrom, Richard -- Johnson, Audra K -- Maurano, Matthew T -- Humbert, Richard -- Rynes, Eric -- Wang, Hao -- Vong, Shinny -- Lee, Kristen -- Bates, Daniel -- Diegel, Morgan -- Roach, Vaughn -- Dunn, Douglas -- Neri, Jun -- Schafer, Anthony -- Hansen, R Scott -- Kutyavin, Tanya -- Giste, Erika -- Weaver, Molly -- Canfield, Theresa -- Sabo, Peter -- Zhang, Miaohua -- Balasundaram, Gayathri -- Byron, Rachel -- MacCoss, Michael J -- Akey, Joshua M -- Bender, M A -- Groudine, Mark -- Kaul, Rajinder -- Stamatoyannopoulos, John A -- F30 DK095678/DK/NIDDK NIH HHS/ -- HG004592/HG/NHGRI NIH HHS/ -- P30 CA015704/CA/NCI NIH HHS/ -- R37 DK044746/DK/NIDDK NIH HHS/ -- RC2 HG005654/HG/NHGRI NIH HHS/ -- RC2HG005654/HG/NHGRI NIH HHS/ -- U54 HG004592/HG/NHGRI NIH HHS/ -- England -- Nature. 2012 Sep 6;489(7414):83-90. doi: 10.1038/nature11212.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22955618" target="_blank"〉PubMed〈/a〉
    Keywords: DNA/*genetics ; *DNA Footprinting ; DNA Methylation ; DNA-Binding Proteins/metabolism ; Deoxyribonuclease I/metabolism ; *Encyclopedias as Topic ; Genome, Human/*genetics ; Genomic Imprinting ; Genomics ; Humans ; *Molecular Sequence Annotation ; Polymorphism, Single Nucleotide/genetics ; Regulatory Sequences, Nucleic Acid/*genetics ; Transcription Factors/*metabolism ; Transcription Initiation Site
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2009-10-10
    Description: We describe Hi-C, a method that probes the three-dimensional architecture of whole genomes by coupling proximity-based ligation with massively parallel sequencing. We constructed spatial proximity maps of the human genome with Hi-C at a resolution of 1 megabase. These maps confirm the presence of chromosome territories and the spatial proximity of small, gene-rich chromosomes. We identified an additional level of genome organization that is characterized by the spatial segregation of open and closed chromatin to form two genome-wide compartments. At the megabase scale, the chromatin conformation is consistent with a fractal globule, a knot-free, polymer conformation that enables maximally dense packing while preserving the ability to easily fold and unfold any genomic locus. The fractal globule is distinct from the more commonly used globular equilibrium model. Our results demonstrate the power of Hi-C to map the dynamic conformations of whole genomes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2858594/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2858594/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lieberman-Aiden, Erez -- van Berkum, Nynke L -- Williams, Louise -- Imakaev, Maxim -- Ragoczy, Tobias -- Telling, Agnes -- Amit, Ido -- Lajoie, Bryan R -- Sabo, Peter J -- Dorschner, Michael O -- Sandstrom, Richard -- Bernstein, Bradley -- Bender, M A -- Groudine, Mark -- Gnirke, Andreas -- Stamatoyannopoulos, John -- Mirny, Leonid A -- Lander, Eric S -- Dekker, Job -- HG003143/HG/NHGRI NIH HHS/ -- R01 HG003143/HG/NHGRI NIH HHS/ -- R01 HG003143-06/HG/NHGRI NIH HHS/ -- R01HL06544/HL/NHLBI NIH HHS/ -- R37DK44746/DK/NIDDK NIH HHS/ -- T32 HG002295/HG/NHGRI NIH HHS/ -- U54HG004592/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2009 Oct 9;326(5950):289-93. doi: 10.1126/science.1181369.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Broad Institute of Harvard and Massachusetts Institute of Technology (MIT), MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19815776" target="_blank"〉PubMed〈/a〉
    Keywords: Biotin ; Cell Line, Transformed ; Cell Nucleus/*ultrastructure ; Chromatin/*chemistry ; Chromatin Immunoprecipitation ; *Chromosomes, Human/chemistry/ultrastructure ; Computational Biology ; DNA/*chemistry ; Gene Library ; *Genome, Human ; Humans ; In Situ Hybridization, Fluorescence ; Models, Molecular ; Monte Carlo Method ; Nucleic Acid Conformation ; Principal Component Analysis ; Protein Conformation ; Sequence Analysis, DNA
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 1985-05-31
    Description: The chromatin structure characteristic of constitutively expressed genes, tissue-specific genes, and inactive genes is absent in chicken sperm chromatin. However, point sites of undermethylation in sperm DNA within constitutively expressed genes, but not within globin genes or an inactive gene, correspond to the location of regions of altered chromatin structure (hypersensitive sites) in somatic tissue and spermatogonial cells. A de novo methylation process whereby regions within and flanking these genes become methylated, but which excludes the methylation of sequences within hypersensitive sites, occurs between the spermatogonial stage and the first meiotic prophase. These undermethylated regions may play a role in the activation of the paternal genome during embryogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Groudine, M -- Conkin, K F -- F32CA07476/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1985 May 31;228(4703):1061-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2986289" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chick Embryo/*physiology ; Chickens/*genetics ; Chromatin/*ultrastructure ; DNA Restriction Enzymes ; DNA, Viral/genetics ; Deoxyribonuclease I ; Endonucleases ; *Gene Expression Regulation ; Globins/genetics ; Male ; *Methylation ; Single-Strand Specific DNA and RNA Endonucleases ; Spermatogenesis ; Spermatozoa/*physiology ; Thymidine Kinase/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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