6T8H

Cryo-EM structure of the DNA-bound PolD-PCNA processive complex from P. abyssi

6T8H の概要

• エントリーDOI: 10.2210/pdb6t8h/pdb
• EMDBエントリー: 10401
• 分子名称: DNA polymerase sliding clamp, DNA polymerase II small subunit, DP2 subunit of D-family DNA-polymerase, ... (7 entities in total)
• 機能のキーワード: pcna, dp2, pold, dp1, replication, pip-box
• 由来する生物種: Pyrococcus abyssi (strain GE5 / Orsay); 詳細
• タンパク質・核酸の鎖数: 7
• 化学式量合計: 316140.45

構造登録者

Madru, C.,Raia, P.,Hugonneau Beaufet, I.,Pehau-Arnaudet, G.,England, P.,Lindhal, E.,Delarue, M.,Carroni, M.,Sauguet, L. (登録日: 2019-10-24, 公開日: 2020-03-04, 最終更新日: 2024-11-20)

主引用文献

Madru, C.,Henneke, G.,Raia, P.,Hugonneau-Beaufet, I.,Pehau-Arnaudet, G.,England, P.,Lindahl, E.,Delarue, M.,Carroni, M.,Sauguet, L.
Structural basis for the increased processivity of D-family DNA polymerases in complex with PCNA.
Nat Commun, 11:1591-1591, 2020

PubMed Abstract: Replicative DNA polymerases (DNAPs) have evolved the ability to copy the genome with high processivity and fidelity. In Eukarya and Archaea, the processivity of replicative DNAPs is greatly enhanced by its binding to the proliferative cell nuclear antigen (PCNA) that encircles the DNA. We determined the cryo-EM structure of the DNA-bound PolD-PCNA complex from Pyrococcus abyssi at 3.77 Å. Using an integrative structural biology approach - combining cryo-EM, X-ray crystallography, protein-protein interaction measurements, and activity assays - we describe the molecular basis for the interaction and cooperativity between a replicative DNAP and PCNA. PolD recruits PCNA via a complex mechanism, which requires two different PIP-boxes. We infer that the second PIP-box, which is shared with the eukaryotic Polα replicative DNAP, plays a dual role in binding either PCNA or primase, and could be a master switch between an initiation and a processive phase during replication.

PubMed: 32221299
DOI: 10.1038/s41467-020-15392-9

実験手法

ELECTRON MICROSCOPY (3.77 Å)