2QWQ

Crystal structure of disulfide-bond-crosslinked complex of bovine hsc70 (1-394aa)R171C and bovine Auxilin (810-910aa)D876C in the AMPPNP hydrolyzed form

Summary for 2QWQ

• Entry DOI: 10.2210/pdb2qwq/pdb
• Related: 2QW9 2QWL 2QWM 2QWN 2QWO 2QWP 2QWR
• Descriptor: Heat shock cognate 71 kDa protein, Putative tyrosine-protein phosphatase auxilin, PHOSPHATE ION, ... (7 entities in total)
• Functional Keywords: chaperone-cochaperone complex, atp-binding, nucleotide-binding, nucleus, phosphorylation, stress response, hydrolase, protein phosphatase, sh3-binding, chaperone
• Biological source: Bos taurus (cattle); More
• Cellular location: Cytoplasm : P19120
• Total number of polymer chains: 2
• Total formula weight: 54881.96

Authors

Jiang, J.,Maes, E.G.,Wang, L.,Taylor, A.B.,Hinck, A.P.,Lafer, E.M.,Sousa, R. (deposition date: 2007-08-10, release date: 2007-12-18, Last modification date: 2024-11-13)

Primary citation

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

Experimental method

X-RAY DIFFRACTION (2.21 Å)