6QI8

Truncated human R2TP complex, structure 3 (ADP-filled)

6QI8 の概要

• エントリーDOI: 10.2210/pdb6qi8/pdb
• EMDBエントリー: 4552
• 分子名称: RuvB-like 1, RuvB-like 2, ADENOSINE-5'-DIPHOSPHATE (3 entities in total)
• 機能のキーワード: r2tp, hsp90 co-chaperone, pih1d1, rpap3, ruvbl1, ruvbl2, cryo-em, chaperone
• 由来する生物種: Homo sapiens (Human); 詳細
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 307121.34

構造登録者

Munoz-Hernandez, H.,Rodriguez, C.F.,Llorca, O. (登録日: 2019-01-18, 公開日: 2019-04-10, 最終更新日: 2024-05-15)

主引用文献

Munoz-Hernandez, H.,Pal, M.,Rodriguez, C.F.,Fernandez-Leiro, R.,Prodromou, C.,Pearl, L.H.,Llorca, O.
Structural mechanism for regulation of the AAA-ATPases RUVBL1-RUVBL2 in the R2TP co-chaperone revealed by cryo-EM.
Sci Adv, 5:eaaw1616-eaaw1616, 2019

PubMed Abstract: The human R2TP complex (RUVBL1-RUVBL2-RPAP3-PIH1D1) is an HSP90 co-chaperone required for the maturation of several essential multiprotein complexes, including RNA polymerase II, small nucleolar ribonucleoproteins, and PIKK complexes such as mTORC1 and ATR-ATRIP. RUVBL1-RUVBL2 AAA-ATPases are also primary components of other essential complexes such as INO80 and Tip60 remodelers. Despite recent efforts, the molecular mechanisms regulating RUVBL1-RUVBL2 in these complexes remain elusive. Here, we report cryo-EM structures of R2TP and show how access to the nucleotide-binding site of RUVBL2 is coupled to binding of the client recruitment component of R2TP (PIH1D1) to its DII domain. This interaction induces conformational rearrangements that lead to the destabilization of an N-terminal segment of RUVBL2 that acts as a gatekeeper to nucleotide exchange. This mechanism couples protein-induced motions of the DII domains with accessibility of the nucleotide-binding site in RUVBL1-RUVBL2, and it is likely a general mechanism shared with other RUVBL1-RUVBL2-containing complexes.

PubMed: 31049401
DOI: 10.1126/sciadv.aaw1616

実験手法

ELECTRON MICROSCOPY (3.75 Å)