Abstract:
:Chromodomain Helicase DNA binding protein 5 (CHD5) is a tumor suppressor mapping to 1p36, a genomic region that is frequently deleted in human cancer. Although CHD5 belongs to the CHD family of chromatin-remodeling proteins, whether its tumor-suppressive role involves an interaction with chromatin is unknown. Here we report that Chd5 binds the unmodified N terminus of H3 through its tandem plant homeodomains (PHDs). Genome-wide chromatin immunoprecipitation studies reveal preferential binding of Chd5 to loci lacking the active mark H3K4me3 and also identify Chd5 targets implicated in cancer. Chd5 mutations that abrogate H3 binding are unable to inhibit proliferation or transcriptionally modulate target genes, which leads to tumorigenesis in vivo. Unlike wild-type Chd5, Chd5-PHD mutants are unable to induce differentiation or efficiently suppress the growth of human neuroblastoma in vivo. Our work defines Chd5 as an N-terminally unmodified H3-binding protein and provides functional evidence that this interaction orchestrates chromatin-mediated transcriptional programs critical for tumor suppression.
journal_name
Cell Repjournal_title
Cell reportsauthors
Paul S,Kuo A,Schalch T,Vogel H,Joshua-Tor L,McCombie WR,Gozani O,Hammell M,Mills AAdoi
10.1016/j.celrep.2012.12.009subject
Has Abstractpub_date
2013-01-31 00:00:00pages
92-102issue
1issn
2211-1247pii
S2211-1247(12)00434-2journal_volume
3pub_type
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