4JIO

Bro1 V domain and ubiquitin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.421 
  • R-Value Work: 0.366 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The yeast alix homolog bro1 functions as a ubiquitin receptor for protein sorting into multivesicular endosomes.

Pashkova, N.Gakhar, L.Winistorfer, S.C.Sunshine, A.B.Rich, M.Dunham, M.J.Yu, L.Piper, R.C.

(2013) Dev.Cell 25: 520-533

  • DOI: 10.1016/j.devcel.2013.04.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Sorting of ubiquitinated membrane proteins into lumenal vesicles of multivesicular bodies is mediated by the Endosomal Sorting Complex Required for Transport (ESCRT) apparatus and accessory proteins such as Bro1, which recruits the deubiquitinating e ...

    Sorting of ubiquitinated membrane proteins into lumenal vesicles of multivesicular bodies is mediated by the Endosomal Sorting Complex Required for Transport (ESCRT) apparatus and accessory proteins such as Bro1, which recruits the deubiquitinating enzyme Doa4 to remove ubiquitin from cargo. Here we propose that Bro1 works as a receptor for the selective sorting of ubiquitinated cargoes. We found synthetic genetic interactions between BRO1 and ESCRT-0, suggesting that Bro1 functions similarly to ESCRT-0. Multiple structural approaches demonstrated that Bro1 binds ubiquitin via the N-terminal trihelical arm of its middle V domain. Mutants of Bro1 that lack the ability to bind Ub were dramatically impaired in their ability to sort Ub-cargo membrane proteins, but only when combined with hypomorphic alleles of ESCRT-0. These data suggest that Bro1 and other Bro1 family members function in parallel with ESCRT-0 to recognize and sort Ub-cargoes.


    Organizational Affiliation

    Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, IA 52242, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BRO1
A, B
344Naumovozyma castellii (strain ATCC 76901 / CBS 4309 / NBRC 1992 / NRRL Y-12630)Mutation(s): 3 
Gene Names: NCAS0B02080
Find proteins for G0VBG6 (Naumovozyma castellii (strain ATCC 76901 / CBS 4309 / NBRC 1992 / NRRL Y-12630))
Go to UniProtKB:  G0VBG6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Ubiquitin
U
76Homo sapiensMutation(s): 1 
Gene Names: UBA52 (UBCEP2)
Find proteins for P62987 (Homo sapiens)
Go to Gene View: UBA52
Go to UniProtKB:  P62987
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.421 
  • R-Value Work: 0.366 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 63.430α = 90.00
b = 92.320β = 90.00
c = 229.450γ = 90.00
Software Package:
Software NamePurpose
d*TREKdata scaling
PHENIXrefinement
Blu-Icedata collection
d*TREKdata reduction
PHENIXmodel building
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-06-19
    Type: Initial release
  • Version 1.1: 2013-07-10
    Type: Database references