EZH1 Mediates Methylation on Histone H3 Lysine 27 and Complements EZH2 in Maintaining Stem Cell Identity and Executing Pluripotency Export

@article{citeulike:4210942, abstract = {Trimethylation on H3K27 (H3K27me3) mediated by Polycomb repressive complex 2 (PRC2) has been linked to embryonic stem cell (ESC) identity and pluripotency. EZH2, the catalytic subunit of PRC2, has been reported as the sole histone methyltransferase that methylates H3K27 and mediates transcriptional silencing. Analysis of Ezh2/ ESCs suggests existence of an additional enzyme(s) catalyzing H3K27 methylation. We have identified EZH1, a homolog of EZH2 that is physically present in a noncanonical PRC2 complex, as an H3K27 methyltransferase in vivo and in vitro. EZH1 colocalizes with the H3K27me3 mark on chromatin and preferentially preserves this mark on development-related genes in Ezh2/ ESCs. Depletion of Ezh1 in cells lacking Ezh2 abolishes residual methylation on H3K27 and derepresses H3K27me3 target genes, demonstrating a role of EZH1 in safeguarding ESC identity. Ezh1 partially complements Ezh2 in executing pluripotency during ESC differentiation, suggesting that cell-fate transitions require epigenetic specificity.}, author = {Shen, Xiaohua and Liu, Yingchun and Hsu, Yu-Jung and Fujiwara, Yuko and Kim, Jonghwan and Mao, Xiaohong and Yuan, Guo-Cheng and Orkin, Stuart H.}, citeulike-article-id = {4210942}, citeulike-linkout-0 = {http://www.cell.com/molecular-cell/abstract/S1097-2765(08)00732-6}, day = {21}, keywords = {h3k27, polycomb}, month = {November}, number = {4}, pages = {491--502}, posted-at = {2009-03-23 18:08:53}, priority = {2}, title = {EZH1 Mediates Methylation on Histone H3 Lysine 27 and Complements EZH2 in Maintaining Stem Cell Identity and Executing Pluripotency}, url = {http://www.cell.com/molecular-cell/abstract/S1097-2765(08)00732-6}, volume = {32}, year = {2008} }

TY - JOUR ID - citeulike:4210942 L3 - citeulike-article-id:4210942 N2 - Trimethylation on H3K27 (H3K27me3) mediated by Polycomb repressive complex 2 (PRC2) has been linked to embryonic stem cell (ESC) identity and pluripotency. EZH2, the catalytic subunit of PRC2, has been reported as the sole histone methyltransferase that methylates H3K27 and mediates transcriptional silencing. Analysis of Ezh2/ ESCs suggests existence of an additional enzyme(s) catalyzing H3K27 methylation. We have identified EZH1, a homolog of EZH2 that is physically present in a noncanonical PRC2 complex, as an H3K27 methyltransferase in vivo and in vitro. EZH1 colocalizes with the H3K27me3 mark on chromatin and preferentially preserves this mark on development-related genes in Ezh2/ ESCs. Depletion of Ezh1 in cells lacking Ezh2 abolishes residual methylation on H3K27 and derepresses H3K27me3 target genes, demonstrating a role of EZH1 in safeguarding ESC identity. Ezh1 partially complements Ezh2 in executing pluripotency during ESC differentiation, suggesting that cell-fate transitions require epigenetic specificity. IS - 4 EP - 502 TI - EZH1 Mediates Methylation on Histone H3 Lysine 27 and Complements EZH2 in Maintaining Stem Cell Identity and Executing Pluripotency VL - 32 SP - 491 KW - h3k27 KW - polycomb AU - Shen, Xiaohua AU - Liu, Yingchun AU - Hsu, Yu-Jung AU - Fujiwara, Yuko AU - Kim, Jonghwan AU - Mao, Xiaohong AU - Yuan, Guo-Cheng AU - Orkin, Stuart PY - 2008/11/21/ UR - http://www.cell.com/molecular-cell/abstract/S1097-2765(08)00732-6 ER -