- EMDB-23755: CryoEM map of the structure of the S. cerevisiae origin recogniti... -
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基本情報
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データベース: EMDB / ID: EMD-23755
タイトル
CryoEM map of the structure of the S. cerevisiae origin recognition complex bound to the replication initiator Cdc6 and the ARS1 origin DNA.
マップデータ
試料
複合体: Complex of origin replication complex with Cdc6 and ARS1 origin DNA
タンパク質・ペプチド: x 7種
DNA: x 2種
リガンド: x 2種
キーワード
replication initiation / REPLICATION
機能・相同性
機能・相同性情報
CDC6 association with the ORC:origin complex / Cul8-RING ubiquitin ligase complex / maintenance of rDNA / Assembly of the ORC complex at the origin of replication / nuclear origin of replication recognition complex / pre-replicative complex assembly involved in nuclear cell cycle DNA replication / Activation of the pre-replicative complex / nuclear pre-replicative complex / Activation of ATR in response to replication stress / DNA replication preinitiation complex ...CDC6 association with the ORC:origin complex / Cul8-RING ubiquitin ligase complex / maintenance of rDNA / Assembly of the ORC complex at the origin of replication / nuclear origin of replication recognition complex / pre-replicative complex assembly involved in nuclear cell cycle DNA replication / Activation of the pre-replicative complex / nuclear pre-replicative complex / Activation of ATR in response to replication stress / DNA replication preinitiation complex / mitotic DNA replication checkpoint signaling / silent mating-type cassette heterochromatin formation / regulation of DNA-templated DNA replication initiation / CDK-mediated phosphorylation and removal of Cdc6 / Orc1 removal from chromatin / regulation of DNA replication / DNA replication origin binding / subtelomeric heterochromatin formation / DNA replication initiation / nucleosome binding / G1/S transition of mitotic cell cycle / chromosome / chromosome, telomeric region / cell division / GTPase activity / chromatin binding / GTP binding / ATP hydrolysis activity / nucleoplasm / ATP binding / nucleus / metal ion binding / cytoplasm 類似検索 - 分子機能
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM131754
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM45436
米国
Biotechnology and Biological Sciences Research Council (BBSRC)
BB/S001387.1
米国
Biotechnology and Biological Sciences Research Council (BBSRC)
BB/N000323/1
米国
引用
ジャーナル: Nat Commun / 年: 2021 タイトル: The structure of ORC-Cdc6 on an origin DNA reveals the mechanism of ORC activation by the replication initiator Cdc6. 著者: Xiang Feng / Yasunori Noguchi / Marta Barbon / Bruce Stillman / Christian Speck / Huilin Li / 要旨: The Origin Recognition Complex (ORC) binds to sites in chromosomes to specify the location of origins of DNA replication. The S. cerevisiae ORC binds to specific DNA sequences throughout the cell ...The Origin Recognition Complex (ORC) binds to sites in chromosomes to specify the location of origins of DNA replication. The S. cerevisiae ORC binds to specific DNA sequences throughout the cell cycle but becomes active only when it binds to the replication initiator Cdc6. It has been unclear at the molecular level how Cdc6 activates ORC, converting it to an active recruiter of the Mcm2-7 hexamer, the core of the replicative helicase. Here we report the cryo-EM structure at 3.3 Å resolution of the yeast ORC-Cdc6 bound to an 85-bp ARS1 origin DNA. The structure reveals that Cdc6 contributes to origin DNA recognition via its winged helix domain (WHD) and its initiator-specific motif. Cdc6 binding rearranges a short α-helix in the Orc1 AAA+ domain and the Orc2 WHD, leading to the activation of the Cdc6 ATPase and the formation of the three sites for the recruitment of Mcm2-7, none of which are present in ORC alone. The results illuminate the molecular mechanism of a critical biochemical step in the licensing of eukaryotic replication origins.