6AU8

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.159 

wwPDB Validation 3D Report Full Report


This is version 1.2 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

  • 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 ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Golgi to ER traffic protein 4 homolog
A
283Homo sapiensMutation(s): 0 
Gene Names: GET4 (C7orf20, CEE, TRC35)
Find proteins for Q7L5D6 (Homo sapiens)
Go to Gene View: GET4
Go to UniProtKB:  Q7L5D6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Large proline-rich protein BAG6
C
43Homo sapiensMutation(s): 0 
Gene Names: BAG6 (BAT3, G3)
Find proteins for P46379 (Homo sapiens)
Go to Gene View: BAG6
Go to UniProtKB:  P46379
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL
Download SDF File 
Download CCD File 
A, C
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.159 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 41.660α = 90.00
b = 84.560β = 90.00
c = 102.580γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
Cootmodel building
PHENIXrefinement
PDB_EXTRACTdata extraction
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM097572

Revision History 

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