2R51

Crystal Structure of mouse Vps26B


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of Vps26B and mapping of its interaction with the retromer protein complex.

Collins, B.M.Norwood, S.J.Kerr, M.C.Mahony, D.Seaman, M.N.Teasdale, R.D.Owen, D.J.

(2008) Traffic 9: 366-379

  • DOI: 10.1111/j.1600-0854.2007.00688.x

  • PubMed Abstract: 
  • Retromer is a heteromeric protein complex with important roles in endosomal membrane trafficking, most notably in the retrograde transport of lysosomal hydrolase receptors from endosomes to the Golgi. The core of retromer is composed of three subunit ...

    Retromer is a heteromeric protein complex with important roles in endosomal membrane trafficking, most notably in the retrograde transport of lysosomal hydrolase receptors from endosomes to the Golgi. The core of retromer is composed of three subunits vacuolar protein sorting (Vps)35, Vps26 and Vps29, and in mammals, there are two paralogues of the medium subunit Vps26A and Vps26B. We find that both Vps26A and Vps26B bind to Vps35/Vps29 with nanomolar affinity and compete for a single-binding site to define distinct retromer complexes in vitro and in vivo. We have determined the crystal structure of mouse Vps26B and compare this structure with that of Vps26A. Vps26 proteins have a striking similarity to the arrestin family of proteins that regulate the signalling and endocytosis of G-protein-coupled receptors, although we observe that surface residues involved in arrestin function are not conserved in Vps26. Using structure-based mutagenesis, we show that both Vps26A and Vps26B are incorporated into retromer complexes through binding of Vps35 to a highly conserved surface patch within the C-terminal subdomain and that this interaction is required for endosomal recruitment of the proteins.


    Organizational Affiliation

    Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia. b.collins@imb.uq.edu.au




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Vacuolar protein sorting-associated protein 26B
A
340Mus musculusMutation(s): 0 
Gene Names: Vps26b
Find proteins for Q8C0E2 (Mus musculus)
Go to UniProtKB:  Q8C0E2
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.194 
  • Space Group: I 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 90.755α = 90.00
b = 125.047β = 90.00
c = 99.896γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
SHARPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-07-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance