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Series GSE34774 Query DataSets for GSE34774
Status Public on Feb 09, 2012
Title PCGF Homologs and RYBP Define Functionally Distinct PRC1 Family Complexes
Organism Homo sapiens
Experiment type Genome binding/occupancy profiling by high throughput sequencing
Summary The heterogeneous nature of mammalian PRC1 complexes has hindered our understanding of their biological functions. Here, we present a comprehensive proteomic and genomic analysis that uncovered six major groups of PRC1 complexes each containing a distinct PCGF subunit, a RING1A/B ubiquitin ligase, and a unique set of associated polypeptides. These PRC1 complexes differ in their genomic localization and only a small subset co-localize with H3K27me3. Further biochemical dissection revealed that the six PCGF–RING1A/B combinations form multiple complexes through association with RYBP or its homolog YAF2, which prevents the incorporation of other canonical PRC1 subunits such as CBX, PHC and SCM. Although both RYBP/YAF2- and CBX/PHC/SCM-containing complexes compact chromatin, only RYBP stimulates the activity of RING1B toward H2AK119ub1, suggesting a central role in PRC1 function. Knockdown of RYBP in ES cells compromised their ability to form embryoid bodies, likely because of defects in cell proliferation and maintenance of H2AK119ub1 level.
Overall design ChIP-seq experiments of different PRC1 components were performed either on HA-tagged transgenic stable 293T-REx lines or on endogenous subunits using specific antibodies.
Contributor(s) Reinberg D, Gao Z, Zhang J, Bonasio R
Citation(s) 22325352
Submission date Dec 29, 2011
Last update date May 15, 2019
Contact name Roberto Bonasio
Organization name University of Pennsylvania
Department Cell and Developmental Biology
Lab Roberto Bonasio
Street address 3400 Civic Center Blvd., 9th floor
City Philadelphia
State/province PA
ZIP/Postal code 19104
Country USA
Platforms (2)
GPL10999 Illumina Genome Analyzer IIx (Homo sapiens)
GPL11154 Illumina HiSeq 2000 (Homo sapiens)
Samples (15)
GSM855006 input
SRA SRP010052
BioProject PRJNA150339

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Supplementary file Size Download File type/resource
GSE34774_RAW.tar 2.9 Gb (http)(custom) TAR (of BED, WIG)
SRA Run SelectorHelp
Raw data are available in SRA
Processed data provided as supplementary file

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