Japan Agency for Medical Research and Development (AMED)
JP17am0101073
日本
Japan Agency for Medical Research and Development (AMED)
JP17am0101072j0001
日本
Japan Society for the Promotion of Science
JP26251008
日本
Japan Society for the Promotion of Science
JP16K18528
日本
Japan Society for the Promotion of Science
JP16H01410
日本
Japan Society for the Promotion of Science
JP17K07313
日本
Japan Society for the Promotion of Science
18K06089
日本
Japan Society for the Promotion of Science
JP18K06064
日本
Japan Society for the Promotion of Science
JP26505009
日本
Japan Agency for Medical Research and Development (AMED)
JP17am0101076
日本
Japan Science and Technology
JPMJPR12L9
日本
引用
ジャーナル: Genes Dev / 年: 2016 タイトル: Integrated molecular mechanism directing nucleosome reorganization by human FACT. 著者: Yasuo Tsunaka / Yoshie Fujiwara / Takuji Oyama / Susumu Hirose / Kosuke Morikawa / 要旨: Facilitates chromatin transcription (FACT) plays essential roles in chromatin remodeling during DNA transcription, replication, and repair. Our structural and biochemical studies of human FACT- ...Facilitates chromatin transcription (FACT) plays essential roles in chromatin remodeling during DNA transcription, replication, and repair. Our structural and biochemical studies of human FACT-histone interactions present precise views of nucleosome reorganization, conducted by the FACT-SPT16 (suppressor of Ty 16) Mid domain and its adjacent acidic AID segment. AID accesses the H2B N-terminal basic region exposed by partial unwrapping of the nucleosomal DNA, thereby triggering the invasion of FACT into the nucleosome. The crystal structure of the Mid domain complexed with an H3-H4 tetramer exhibits two separate contact sites; the Mid domain forms a novel intermolecular β structure with H4. At the other site, the Mid-H2A steric collision on the H2A-docking surface of the H3-H4 tetramer within the nucleosome induces H2A-H2B displacement. This integrated mechanism results in disrupting the H3 αN helix, which is essential for retaining the nucleosomal DNA ends, and hence facilitates DNA stripping from histone.