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Dynamic loss of H2B ubiquitylation without corresponding changes in H3K4 trimethylation during myogenic differentiation.

Mol. Cell. Biol.2012 Mar;32(6):1044-55. Epub 2012 Jan 17
Vasupradha Vethantham 1 , Yan Yang , Christopher Bowman , Patrik Asp , Jeong-Heon Lee , David G Skalnik , Brian D Dynlacht
Vasupradha Vethantham 1 , Yan Yang , Christopher Bowman , Patrik Asp , Jeong-Heon Lee , David G Skalnik , Brian D Dynlacht
+ et al

[No authors listed]

Author information
  • 1 Department of Pathology and Cancer Institute, Smilow Research Center, New York University School of Medicine, New York, New York, USA.

摘要


Ubiquitylation of H2B on lysine 120 (H2Bub) is associated with active transcriptional elongation. H2Bub has been implicated in histone cross talk and is generally regarded to be a prerequisite for trimethylation of histone 3 lysine 4 (H3K4me3) and H3K79 in both yeast and mammalian cells. We performed a genome-wide analysis of epigenetic marks during muscle differentiation, and strikingly, we observed a near-complete loss of H2Bub in the differentiated state. We examined the basis for global loss of this mark and found that the H2B ubiquitin E3 ligase, RNF20, was depleted from chromatin in differentiated myotubes, indicating that recruitment of this protein to genes substantially decreases upon differentiation. Remarkably, during the course of myogenic differentiation, we observed retention and acquisition of H3K4 trimethylation on a large number of genes in the absence of detectable H2Bub. The Set1 H3K4 trimethylase complex was efficiently recruited to a subset of genes in myotubes in the absence of detectable H2Bub, accounting in part for H3K4 trimethylation in myotubes. Our studies suggest that H3K4me3 deposition in the absence of detectable H2Bub in myotubes is mediated via Set1 and, perhaps, MLL complexes, whose recruitment does not require H2Bub. Thus, muscle cells represent a novel setting in which to explore mechanisms that regulate histone cross talk.

原始数据


 保存测序数据
Sample name
Organism Experiment title Sample type Library instrument Attributes
antibody lot numbercell typechip antibodychromatin preparation methodsource name
H2Bub_MT_replicate3
Mus musculus GSM859582: H2Bub_MT_replicate3 ChIP-Seq Illumina Genome Analyzer II DAM1588304 C2C12 H2Bub, Millipore: 05-1312, clone 56 MNAse digestion C1C12 myotubes differentiated for 96h
H2Bub_MT_replicate2
Mus musculus GSM859581: H2Bub_MT_replicate2 ChIP-Seq Illumina Genome Analyzer II DAM1588303 C2C12 H2Bub, Millipore: 05-1312, clone 56 MNAse digestion C1C12 myotubes differentiated for 96h
H2Bub_MT_replicate1
Mus musculus GSM859580: H2Bub_MT_replicate1 ChIP-Seq Illumina Genome Analyzer II DAM1588302 C2C12 H2Bub, Millipore: 05-1312, clone 56 MNAse digestion C1C12 myotubes differentiated for 96h
H2Bub_MB_replicate3
Mus musculus GSM859579: H2Bub_MB_replicate3 ChIP-Seq Illumina Genome Analyzer II DAM1588301 C2C12 H2Bub, Millipore: 05-1312, clone 56 MNAse digestion Growing C1C12 myoblasts
H2Bub_MB_replicate2
Mus musculus GSM859578: H2Bub_MB_replicate2 ChIP-Seq Illumina Genome Analyzer II DAM1588300 C2C12 H2Bub, Millipore: 05-1312, clone 56 MNAse digestion Growing C1C12 myoblasts