FEATURES

FAMILY

DESCRIPTION

Also known as PHF19_HUMAN, PHF19, PCL3. Polycomb group (PcG) protein that specifically binds histone H3 trimethylated at 'Lys-36' (H3K36me3) and recruits the PRC2 complex, thus enhancing PRC2 H3K27me3 methylation activity (PubMed:15563832, PubMed:18691976, PubMed:23160351, PubMed:23228662, PubMed:23273982, PubMed:29499137, PubMed:23104054, PubMed:31959557). Probably involved in the transition from an active state to a repressed state in embryonic stem cells: acts by binding to H3K36me3, a mark for transcriptional activation, and recruiting H3K36me3 histone demethylases RIOX1 or KDM2B, leading to demethylation of H3K36 and recruitment of the PRC2 complex that mediates H3K27me3 methylation, followed by de novo silencing (PubMed:23160351). Recruits the PRC2 complex to CpG islands and contributes to embryonic stem cell self-renewal. Also binds histone H3 dimethylated at 'Lys-36' (H3K36me2) (PubMed:23104054). Isoform 1 and isoform 2 inhibit transcription from an HSV-tk promoter (PubMed:15563832). Associates with the PRC2 complex, which consists of the core components EED, EZH1 or EZH2, SUZ12, and RBBP4, and various combinations of accessory subunits including AEBP2, JARID2, PHF19, MTF2 and EPOP (PubMed:23104054, PubMed:29499137, PubMed:31959557). Forms a dimeric PRC2.1 (class 1, PRC-PCL) complex consisting of at least SUZ12, RBBP4, and PHF19 or MTF2; PHF19 and MTF2 stabilize the dimeric structure which enhances PRC2 interaction with chromatin (PubMed:31959557). Interacts with SUZ12; competes with AEBP2 for SUZ12 binding (PubMed:29499137, PubMed:31959557). Interacts with EZH2 (via its Tudor domain) (PubMed:21143197). Isoform 1 interacts with SUZ12; isoform 2 does not interact with SUZ12 (PubMed:23104054). Interacts with RIOX1 (PubMed:23160351).

EXTERNAL LINKS

PHF19

PHD finger protein 19

PHF19

Molecular Synopsis