2QWL

Crystal structure of bovine hsc70 (1-394aa)in the ADP state

2QWL の概要

• エントリーDOI: 10.2210/pdb2qwl/pdb
• 関連するPDBエントリー: 2QWM 2QWN 2QWO 2QWP 2QWQ 2QWR
• 分子名称: Heat shock cognate 71 kDa protein, MAGNESIUM ION, SODIUM ION, ... (6 entities in total)
• 機能のキーワード: chaperone, atp-binding, nucleotide-binding, nucleus, phosphorylation, stress response
• 由来する生物種: Bos taurus (cattle)
• 細胞内の位置: Cytoplasm : P19120
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 87931.28

構造登録者

Jiang, J.,Maes, E.G.,Wang, L.,Taylor, A.B.,Hinck, A.P.,Lafer, E.M.,Sousa, R. (登録日: 2007-08-10, 公開日: 2007-12-18, 最終更新日: 2024-02-21)

主引用文献

Jiang, J.,Maes, E.G.,Taylor, A.B.,Wang, L.,Hinck, A.P.,Lafer, E.M.,Sousa, R.
Structural basis of J cochaperone binding and regulation of Hsp70.
Mol.Cell, 28:422-433, 2007

PubMed Abstract: The many protein processing reactions of the ATP-hydrolyzing Hsp70s are regulated by J cochaperones, which contain J domains that stimulate Hsp70 ATPase activity and accessory domains that present protein substrates to Hsp70s. We report the structure of a J domain complexed with a J responsive portion of a mammalian Hsp70. The J domain activates ATPase activity by directing the linker that connects the Hsp70 nucleotide binding domain (NBD) and substrate binding domain (SBD) toward a hydrophobic patch on the NBD surface. Binding of the J domain to Hsp70 displaces the SBD from the NBD, which may allow the SBD flexibility to capture diverse substrates. Unlike prokaryotic Hsp70, the SBD and NBD of the mammalian chaperone interact in the ADP state. Thus, although both nucleotides and J cochaperones modulate Hsp70 NBD:linker and NBD:SBD interactions, the intrinsic persistence of those interactions differs in different Hsp70s and this may optimize their activities for different cellular roles.

PubMed: 17996706
DOI: 10.1016/j.molcel.2007.08.022

実験手法

X-RAY DIFFRACTION (1.75 Å)