Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 25 
  • Selection Criteria: all calculated structures submitted 

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This is version 1.3 of the entry. See complete history


Structural analysis of BAG1 cochaperone and its interactions with Hsc70 heat shock protein.

Briknarova, K.Takayama, S.Brive, L.Havert, M.L.Knee, D.A.Velasco, J.Homma, S.Cabezas, E.Stuart, J.Hoyt, D.W.Satterthwait, A.C.Llinas, M.Reed, J.C.Ely, K.R.

(2001) Nat Struct Biol 8: 349-352

  • DOI: https://doi.org/10.1038/86236
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    BAG-family proteins share a conserved protein interaction region, called the 'BAG domain', which binds and regulates Hsp70/Hsc70 molecular chaperones. This family of cochaperones functionally regulates signal transducing proteins and transcription factors important for cell stress responses, apoptosis, proliferation, cell migration and hormone action. Aberrant overexpression of the founding member of this family, BAG1, occurs in human cancers. In this study, a structure-based approach was used to identify interacting residues in a BAG1--Hsc70 complex. An Hsc70-binding fragment of BAG1 was shown by multidimensional NMR methods to consist of an antiparallel three-helix bundle. NMR chemical shift experiments marked surface residues on the second (alpha 2) and third (alpha 3) helices in the BAG domain that are involved in chaperone binding. Structural predictions were confirmed by site-directed mutagenesis of these residues, resulting in loss of binding of BAG1 to Hsc70 in vitro and in cells. Molecular docking of BAG1 to Hsc70 and mutagenesis of Hsc70 marked the molecular surface of the ATPase domain necessary for interaction with BAG1. The results provide a structural basis for understanding the mechanism by which BAG proteins link molecular chaperones and cell signaling pathways.

  • Organizational Affiliation

    The Burnham Institute, La Jolla, California 92037, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gene Names: BAG1
UniProt & NIH Common Fund Data Resources
Find proteins for Q60739 (Mus musculus)
Explore Q60739 
Go to UniProtKB:  Q60739
IMPC:  MGI:108047
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ60739
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 25 
  • Selection Criteria: all calculated structures submitted 

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2001-09-06
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Data collection, Database references, Derived calculations