| Title | The chromatin remodeling complex NuRD establishes the poised state of rRNA genes characterized by bivalent histone modifications and altered nucleosome positions |
| Authors | Xie, Wenbing Ling, Te Zhou, Yonggang Feng, Weijun Zhu, Qiaoyun Stunnenberg, Henk G. Grummt, Ingrid Tao, Wei |
| Affiliation | German Canc Res Ctr, Div Mol Biol Cell 2, D-69120 Heidelberg, Germany. Peking Univ, Key Lab Cell Proliferat & Differentiat, Educ Minist, Beijing 100871, Peoples R China. Nijmegen Ctr Mol Life Sci, NL-6500 HB Nijmegen, Netherlands. |
| Keywords | poised chromatin cell differentiation epigenetic dynamics NoRC POLYMERASE-I TRANSCRIPTION NORC BINDING PROTEIN METHYLTRANSFERASE CHROMODOMAINS METHYLATION TERMINATION EXPRESSION MI-2-BETA |
| Issue Date | 2012 |
| Publisher | proceedings of the national academy of sciences of the united states of america |
| Citation | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA.2012,109,(21),8161-8166. |
| Abstract | rRNA genes (rDNA) exist in two distinct epigenetic states, active promoters being unmethylated and marked by euchromatic histone modifications, whereas silent ones are methylated and exhibit heterochromatic features. Here we show that the nucleosome remodeling and deacetylation (NuRD) complex establishes a specific chromatin structure at rRNA genes that are poised for transcription activation. The promoter of poised rRNA genes is unmethylated, associated with components of the preinitiation complex, marked by bivalent histone modifications and covered by a nucleosome in the "off" position, which is refractory to transcription initiation. Repression of rDNA transcription in growth-arrested and differentiated cells correlates with elevated association of NuRD and increased levels of poised rRNA genes. Reactivation of transcription requires resetting the promoter-bound nucleosome into the "on" position by the DNA-dependent ATPase CSB (Cockayne syndrome protein B). The results uncover a unique mechanism by which ATP-dependent chromatin remodeling complexes with opposing activities establish a specific chromatin state and regulate transcription. |
| URI | http://hdl.handle.net/20.500.11897/343416 |
| ISSN | 0027-8424 |
| DOI | 10.1073/pnas.1201262109 |
| Indexed | SCI(E) PubMed |
| Appears in Collections: | 细胞增殖分化调控机理研究教育部重点实验室 |
