- EMDB-8540: Structural basis of MCM2-7 replicative helicase loading by ORC-Cd... -
+
データを開く
IDまたはキーワード:
読み込み中...
-
基本情報
登録情報
データベース: EMDB / ID: EMD-8540
タイトル
Structural basis of MCM2-7 replicative helicase loading by ORC-Cdc6 and Cdt1
マップデータ
Tetrameric HIV-1 Strand Transfer Complex Intasome
試料
複合体: ORC-Cdc6-Cdt1-MCM2-7
タンパク質・ペプチド: x 14種
DNA: x 2種
リガンド: x 1種
機能・相同性
機能・相同性情報
MCM complex loading / CDC6 association with the ORC:origin complex / Cul8-RING ubiquitin ligase complex / maintenance of rDNA / MCM core complex / Assembly of the pre-replicative complex / Switching of origins to a post-replicative state / MCM complex binding / nuclear DNA replication / Assembly of the ORC complex at the origin of replication ...MCM complex loading / CDC6 association with the ORC:origin complex / Cul8-RING ubiquitin ligase complex / maintenance of rDNA / MCM core complex / Assembly of the pre-replicative complex / Switching of origins to a post-replicative state / MCM complex binding / nuclear DNA replication / Assembly of the ORC complex at the origin of replication / premeiotic DNA replication / nuclear origin of replication recognition complex / pre-replicative complex assembly involved in nuclear cell cycle DNA replication / mitotic DNA replication / Activation of the pre-replicative complex / CMG complex / nuclear pre-replicative complex / nucleosome organization / cyclin-dependent protein serine/threonine kinase inhibitor activity / Activation of ATR in response to replication stress / DNA replication preinitiation complex / MCM complex / replication fork protection complex / mitotic DNA replication checkpoint signaling / double-strand break repair via break-induced replication / single-stranded DNA helicase activity / mitotic DNA replication initiation / regulation of DNA-templated DNA replication initiation / silent mating-type cassette heterochromatin formation / CDK-mediated phosphorylation and removal of Cdc6 / DNA strand elongation involved in DNA replication / Orc1 removal from chromatin / nuclear replication fork / regulation of DNA replication / DNA replication origin binding / DNA replication initiation / subtelomeric heterochromatin formation / nucleosome binding / helicase activity / transcription elongation by RNA polymerase II / G1/S transition of mitotic cell cycle / heterochromatin formation / single-stranded DNA binding / chromosome / DNA helicase / forked DNA-dependent helicase activity / single-stranded 3'-5' DNA helicase activity / four-way junction helicase activity / double-stranded DNA helicase activity / chromosome, telomeric region / DNA replication / cell division / GTPase activity / DNA damage response / chromatin binding / GTP binding / ATP hydrolysis activity / zinc ion binding / nucleoplasm / ATP binding / metal ion binding / nucleus / cytoplasm 類似検索 - 分子機能
ジャーナル: Nat Struct Mol Biol / 年: 2017 タイトル: Structural basis of Mcm2-7 replicative helicase loading by ORC-Cdc6 and Cdt1. 著者: Zuanning Yuan / Alberto Riera / Lin Bai / Jingchuan Sun / Saikat Nandi / Christos Spanos / Zhuo Angel Chen / Marta Barbon / Juri Rappsilber / Bruce Stillman / Christian Speck / Huilin Li / 要旨: To initiate DNA replication, the origin recognition complex (ORC) and Cdc6 load an Mcm2-7 double hexamer onto DNA. Without ATP hydrolysis, ORC-Cdc6 recruits one Cdt1-bound Mcm2-7 hexamer, thus ...To initiate DNA replication, the origin recognition complex (ORC) and Cdc6 load an Mcm2-7 double hexamer onto DNA. Without ATP hydrolysis, ORC-Cdc6 recruits one Cdt1-bound Mcm2-7 hexamer, thus forming an ORC-Cdc6-Cdt1-Mcm2-7 (OCCM) helicase-loading intermediate. Here we report a 3.9-Å structure of Saccharomyces cerevisiae OCCM on DNA. Flexible Mcm2-7 winged-helix domains (WHDs) engage ORC-Cdc6. A three-domain Cdt1 configuration embraces Mcm2, Mcm4, and Mcm6, thus comprising nearly half of the hexamer. The Cdt1 C-terminal domain extends to the Mcm6 WHD, which binds the Orc4 WHD. DNA passes through the ORC-Cdc6 and Mcm2-7 rings. Origin DNA interaction is mediated by an α-helix within Orc4 and positively charged loops within Orc2 and Cdc6. The Mcm2-7 C-tier AAA+ ring is topologically closed by an Mcm5 loop that embraces Mcm2, but the N-tier-ring Mcm2-Mcm5 interface remains open. This structure suggests a loading mechanism of the first Cdt1-bound Mcm2-7 hexamer by ORC-Cdc6.