5VSO

NMR structure of Ydj1 J-domain, a cytosolic Hsp40 from Saccharomyces cerevisiae


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Broadening the functionality of a J-protein/Hsp70 molecular chaperone system.

Schilke, B.A.Ciesielski, S.J.Ziegelhoffer, T.Kamiya, E.Tonelli, M.Lee, W.Cornilescu, G.Hines, J.K.Markley, J.L.Craig, E.A.

(2017) PLoS Genet 13: e1007084-e1007084

  • DOI: 10.1371/journal.pgen.1007084
  • Primary Citation of Related Structures:  
    5VSO

  • PubMed Abstract: 
  • By binding to a multitude of polypeptide substrates, Hsp70-based molecular chaperone systems perform a range of cellular functions. All J-protein co-chaperones play the essential role, via action of their J-domains, of stimulating the ATPase activity ...

    By binding to a multitude of polypeptide substrates, Hsp70-based molecular chaperone systems perform a range of cellular functions. All J-protein co-chaperones play the essential role, via action of their J-domains, of stimulating the ATPase activity of Hsp70, thereby stabilizing its interaction with substrate. In addition, J-proteins drive the functional diversity of Hsp70 chaperone systems through action of regions outside their J-domains. Targeting to specific locations within a cellular compartment and binding of specific substrates for delivery to Hsp70 have been identified as modes of J-protein specialization. To better understand J-protein specialization, we concentrated on Saccharomyces cerevisiae SIS1, which encodes an essential J-protein of the cytosol/nucleus. We selected suppressors that allowed cells lacking SIS1 to form colonies. Substitutions changing single residues in Ydj1, a J-protein, which, like Sis1, partners with Hsp70 Ssa1, were isolated. These gain-of-function substitutions were located at the end of the J-domain, suggesting that suppression was connected to interaction with its partner Hsp70, rather than substrate binding or subcellular localization. Reasoning that, if YDJ1 suppressors affect Ssa1 function, substitutions in Hsp70 itself might also be able to overcome the cellular requirement for Sis1, we carried out a selection for SSA1 suppressor mutations. Suppressing substitutions were isolated that altered sites in Ssa1 affecting the cycle of substrate interaction. Together, our results point to a third, additional means by which J-proteins can drive Hsp70's ability to function in a wide range of cellular processes-modulating the Hsp70-substrate interaction cycle.


    Organizational Affiliation

    Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Yeast dnaJ protein 1A75Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: YDJ1MAS5YNL064CN2418YNL2418C
Find proteins for P25491 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P25491 
Go to UniProtKB:  P25491
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 5VSO Olderado

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM31107
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM27870

Revision History 

  • Version 1.0: 2017-11-01
    Type: Initial release
  • Version 1.1: 2017-11-15
    Changes: Database references
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence, Data collection