6AU8

1.8 angstrom crystal structure of the human Bag6-NLS & TRC35 complex

  • Classification: CHAPERONE
  • Organism(s): Homo sapiens
  • Expression System: Escherichia coli
  • Mutation(s): No 

  • Deposited: 2017-08-31 Released: 2017-11-01 
  • Deposition Author(s): Mock, J.Y., Clemons Jr., W.M.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.162 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural basis for regulation of the nucleo-cytoplasmic distribution of Bag6 by TRC35.

Mock, J.Y.Xu, Y.Ye, Y.Clemons, W.M.

(2017) Proc Natl Acad Sci U S A 114: 11679-11684

  • DOI: 10.1073/pnas.1702940114
  • Primary Citation of Related Structures:  
    6AU8

  • PubMed Abstract: 
  • The metazoan protein BCL2-associated athanogene cochaperone 6 (Bag6) forms a hetero-trimeric complex with ubiquitin-like 4A and transmembrane domain recognition complex 35 (TRC35). This Bag6 complex is involved in tail-anchored protein targeting and vari ...

    The metazoan protein BCL2-associated athanogene cochaperone 6 (Bag6) forms a hetero-trimeric complex with ubiquitin-like 4A and transmembrane domain recognition complex 35 (TRC35). This Bag6 complex is involved in tail-anchored protein targeting and various protein quality-control pathways in the cytosol as well as regulating transcription and histone methylation in the nucleus. Here we present a crystal structure of Bag6 and its cytoplasmic retention factor TRC35, revealing that TRC35 is remarkably conserved throughout the opisthokont lineage except at the C-terminal Bag6-binding groove, which evolved to accommodate Bag6, a unique metazoan factor. While TRC35 and its fungal homolog, guided entry of tail-anchored protein 4 (Get4), utilize a conserved hydrophobic patch to bind their respective partners, Bag6 wraps around TRC35 on the opposite face relative to the Get4-5 interface. We further demonstrate that TRC35 binding is critical not only for occluding the Bag6 nuclear localization sequence from karyopherin α to retain Bag6 in the cytosol but also for preventing TRC35 from succumbing to RNF126-mediated ubiquitylation and degradation. The results provide a mechanism for regulation of Bag6 nuclear localization and the functional integrity of the Bag6 complex in the cytosol.


    Organizational Affiliation

    Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125; clemons@caltech.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Golgi to ER traffic protein 4 homolog A283Homo sapiensMutation(s): 0 
Gene Names: GET4C7orf20CEETRC35CGI-20
Find proteins for Q7L5D6 (Homo sapiens)
Explore Q7L5D6 
Go to UniProtKB:  Q7L5D6
NIH Common Fund Data Resources
PHAROS:  Q7L5D6
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Large proline-rich protein BAG6 C43Homo sapiensMutation(s): 0 
Gene Names: BAG6BAT3G3
Find proteins for P46379 (Homo sapiens)
Explore P46379 
Go to UniProtKB:  P46379
NIH Common Fund Data Resources
PHAROS:  P46379
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
A, C
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.162 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.66α = 90
b = 84.56β = 90
c = 102.58γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XSCALEdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
PHASERphasing
Cootmodel building

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 StatesGM097572

Revision History 

  • Version 1.0: 2017-11-01
    Type: Initial release
  • Version 1.1: 2017-11-15
    Changes: Database references
  • Version 1.2: 2017-12-06
    Changes: Author supporting evidence
  • Version 1.3: 2020-01-01
    Changes: Author supporting evidence