- EMDB-41254: Cryo-EM map of the Saccharomyces cerevisiae clamp unloader Elg1-R... -
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基本情報
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データベース: EMDB / ID: EMD-41254
タイトル
Cryo-EM map of the Saccharomyces cerevisiae clamp unloader Elg1-RFC bound to PCNA
マップデータ
Cryo-EM map of closed PCNA clamp
試料
複合体: PCNA clamp unloader Elg1-RFC
複合体: PCNA clamp unloader Elg1-RFC
タンパク質・ペプチド: ELG1 isoform 1
タンパク質・ペプチド: Replication factor C subunit 4
タンパク質・ペプチド: Replication factor C subunit 3
タンパク質・ペプチド: Replication factor C subunit 2
タンパク質・ペプチド: Replication factor C subunit 5
複合体: PCNA clamp
タンパク質・ペプチド: Proliferating cell nuclear antigen
リガンド: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
リガンド: MAGNESIUM ION
リガンド: ADENOSINE-5'-DIPHOSPHATE
キーワード
DNA replication / DNA sliding clamp / PCNA clamp / clamp loader/unloader / Elg1-RFC unloader / REPLICATION
機能・相同性
機能・相同性情報
DNA clamp unloading / Rad17 RFC-like complex / Gap-filling DNA repair synthesis and ligation in GG-NER / Elg1 RFC-like complex / Ctf18 RFC-like complex / DNA replication factor C complex / Polymerase switching / Translesion synthesis by REV1 / Translesion synthesis by POLK / Translesion synthesis by POLI ...DNA clamp unloading / Rad17 RFC-like complex / Gap-filling DNA repair synthesis and ligation in GG-NER / Elg1 RFC-like complex / Ctf18 RFC-like complex / DNA replication factor C complex / Polymerase switching / Translesion synthesis by REV1 / Translesion synthesis by POLK / Translesion synthesis by POLI / Translesion Synthesis by POLH / DNA replication checkpoint signaling / Activation of ATR in response to replication stress / Termination of translesion DNA synthesis / sister chromatid cohesion / mitotic sister chromatid cohesion / leading strand elongation / DNA polymerase processivity factor activity / regulation of DNA replication / Gap-filling DNA repair synthesis and ligation in TC-NER / Dual incision in TC-NER / mismatch repair / DNA damage checkpoint signaling / DNA-templated DNA replication / DNA replication / DNA repair / ATP hydrolysis activity / DNA binding / ATP binding / nucleus / cytosol 類似検索 - 分子機能
Replication factor C subunit 3, C-terminal domain / RCF1/5-like, AAA+ ATPase lid domain / Replication factor C, C-terminal / Replication factor C C-terminal domain / : / DNA polymerase III, delta subunit / : / DNA polymerase III, clamp loader complex, gamma/delta/delta subunit, C-terminal / Proliferating cell nuclear antigen signature 2. / Proliferating cell nuclear antigen, PCNA, conserved site ...Replication factor C subunit 3, C-terminal domain / RCF1/5-like, AAA+ ATPase lid domain / Replication factor C, C-terminal / Replication factor C C-terminal domain / : / DNA polymerase III, delta subunit / : / DNA polymerase III, clamp loader complex, gamma/delta/delta subunit, C-terminal / Proliferating cell nuclear antigen signature 2. / Proliferating cell nuclear antigen, PCNA, conserved site / Proliferating cell nuclear antigen signature 1. / Proliferating cell nuclear antigen, PCNA / Proliferating cell nuclear antigen, PCNA, N-terminal / Proliferating cell nuclear antigen, PCNA, C-terminal / Proliferating cell nuclear antigen, N-terminal domain / Proliferating cell nuclear antigen, C-terminal domain / : / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / 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
Proliferating cell nuclear antigen / ELG1 isoform 1 / Replication factor C subunit 5 / Replication factor C subunit 3 / Replication factor C subunit 4 / Replication factor C subunit 2 類似検索 - 構成要素
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)
GM115809
米国
Howard Hughes Medical Institute (HHMI)
米国
引用
ジャーナル: Sci Adv / 年: 2024 タイトル: Structure of the PCNA unloader Elg1-RFC. 著者: Fengwei Zheng / Nina Y Yao / Roxana E Georgescu / Huilin Li / Michael E O'Donnell / 要旨: During DNA replication, the proliferating cell nuclear antigen (PCNA) clamps are loaded onto primed sites for each Okazaki fragment synthesis by the AAA heteropentamer replication factor C (RFC). ...During DNA replication, the proliferating cell nuclear antigen (PCNA) clamps are loaded onto primed sites for each Okazaki fragment synthesis by the AAA heteropentamer replication factor C (RFC). PCNA encircling duplex DNA is quite stable and is removed from DNA by the dedicated clamp unloader Elg1-RFC. Here, we show the cryo-EM structure of Elg1-RFC in various states with PCNA. The structures reveal essential features of Elg1-RFC that explain how it is dedicated to PCNA unloading. Specifically, Elg1 contains two external loops that block opening of the Elg1-RFC complex for DNA binding, and an "Elg1 plug" domain that fills the central DNA binding chamber, thereby reinforcing the exclusive PCNA unloading activity of Elg1-RFC. Elg1-RFC was capable of unloading PCNA using non-hydrolyzable AMP-PNP. Both RFC and Elg1-RFC could remove PCNA from covalently closed circular DNA, indicating that PCNA unloading occurs by a mechanism that is distinct from PCNA loading. Implications for the PCNA unloading mechanism are discussed.