- EMDB-6535: Structure of the eukaryotic replicative CMG helicase and pumpjack... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-6535
タイトル
Structure of the eukaryotic replicative CMG helicase and pumpjack motion
マップデータ
Structure of CMG with "Flat" Mcm2-7 ring
試料
試料: Saccharomyces cerevisiae CMG complex
タンパク質・ペプチド: CMG complex
キーワード
CMG helicase / Cryo-EM
機能・相同性
機能・相同性情報
Unwinding of DNA / DNA strand elongation involved in mitotic DNA replication / GINS complex / MCM core complex / Assembly of the pre-replicative complex / Switching of origins to a post-replicative state / MCM complex binding / mitotic DNA replication preinitiation complex assembly / nuclear DNA replication / premeiotic DNA replication ...Unwinding of DNA / DNA strand elongation involved in mitotic DNA replication / GINS complex / MCM core complex / Assembly of the pre-replicative complex / Switching of origins to a post-replicative state / MCM complex binding / mitotic DNA replication preinitiation complex assembly / nuclear DNA replication / premeiotic DNA replication / 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 / Activation of ATR in response to replication stress / DNA replication preinitiation complex / : / MCM complex / replication fork protection complex / double-strand break repair via break-induced replication / single-stranded DNA helicase activity / mitotic DNA replication initiation / silent mating-type cassette heterochromatin formation / regulation of DNA-templated DNA replication initiation / DNA strand elongation involved in DNA replication / nuclear replication fork / DNA replication origin binding / DNA replication initiation / subtelomeric heterochromatin formation / helicase activity / transcription elongation by RNA polymerase II / DNA-templated DNA replication / heterochromatin formation / single-stranded DNA binding / 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 / DNA damage response / chromatin binding / ATP hydrolysis activity / zinc ion binding / nucleoplasm / ATP binding / nucleus / cytoplasm 類似検索 - 分子機能
: / PSF3 N-terminal domain / CDC45 family / DNA replication complex GINS protein Psf2 / CDC45 / GINS complex, subunit Psf1 / GINS complex, subunit Psf3 / DNA replication complex GINS protein SLD5, C-terminal / GINS, helical bundle-like domain superfamily / GINS complex, subunit Psf3 superfamily ...: / PSF3 N-terminal domain / CDC45 family / DNA replication complex GINS protein Psf2 / CDC45 / GINS complex, subunit Psf1 / GINS complex, subunit Psf3 / DNA replication complex GINS protein SLD5, C-terminal / GINS, helical bundle-like domain superfamily / GINS complex, subunit Psf3 superfamily / GINS complex protein Sld5, alpha-helical domain / : / DNA replication complex GINS protein SLD5 C-terminus / MCM3 winged helix domain / GINS complex subunit Sld5 / GINS subunit, domain A / GINS complex protein helical bundle domain / MCM4, winged helix domain / : / MCM5, C-terminal domain / MCM3-like, winged helix domain / DNA replication licensing factor Mcm5 / DNA replication licensing factor Mcm3 / Mini-chromosome maintenance complex protein 4 / DNA replication licensing factor Mcm6 / DNA replication licensing factor Mcm7 / Mcm6, C-terminal winged-helix domain / MCM6 C-terminal winged-helix domain / DNA replication licensing factor Mcm2 / Mini-chromosome maintenance protein 2 / Mini-chromosome maintenance, conserved site / MCM family signature. / MCM N-terminal domain / MCM N-terminal domain / MCM OB domain / MCM OB domain / Mini-chromosome maintenance protein / MCM, AAA-lid domain / MCM P-loop domain / MCM AAA-lid domain / MCM family domain profile. / minichromosome maintenance proteins / MCM domain / Winged helix-like DNA-binding domain superfamily / Nucleic acid-binding, OB-fold / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
DNA replication licensing factor MCM3 / DNA replication licensing factor MCM2 / Minichromosome maintenance protein 5 / DNA replication licensing factor MCM4 / DNA replication licensing factor MCM7 / DNA replication complex GINS protein PSF2 / DNA replication licensing factor MCM6 / DNA replication complex GINS protein SLD5 / Cell division control protein 45 / DNA replication complex GINS protein PSF3 / DNA replication complex GINS protein PSF1 類似検索 - 構成要素
ジャーナル: Nat Struct Mol Biol / 年: 2016 タイトル: Structure of the eukaryotic replicative CMG helicase suggests a pumpjack motion for translocation. 著者: Zuanning Yuan / Lin Bai / Jingchuan Sun / Roxana Georgescu / Jun Liu / Michael E O'Donnell / Huilin Li / 要旨: The CMG helicase is composed of Cdc45, Mcm2-7 and GINS. Here we report the structure of the Saccharomyces cerevisiae CMG, determined by cryo-EM at a resolution of 3.7-4.8 Å. The structure reveals ...The CMG helicase is composed of Cdc45, Mcm2-7 and GINS. Here we report the structure of the Saccharomyces cerevisiae CMG, determined by cryo-EM at a resolution of 3.7-4.8 Å. The structure reveals that GINS and Cdc45 scaffold the N tier of the helicase while enabling motion of the AAA+ C tier. CMG exists in two alternating conformations, compact and extended, thus suggesting that the helicase moves like an inchworm. The N-terminal regions of Mcm2-7, braced by Cdc45-GINS, form a rigid platform upon which the AAA+ C domains make longitudinal motions, nodding up and down like an oil-rig pumpjack attached to a stable platform. The Mcm ring is remodeled in CMG relative to the inactive Mcm2-7 double hexamer. The Mcm5 winged-helix domain is inserted into the central channel, thus blocking entry of double-stranded DNA and supporting a steric-exclusion DNA-unwinding model.