3UM3

Crystal structure of the Brox Bro1 domain in complex with the C-terminal tail of CHMP4B


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.233 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Two Distinct Binding Modes Define the Interaction of Brox with the C-Terminal Tails of CHMP5 and CHMP4B.

Mu, R.Dussupt, V.Jiang, J.Sette, P.Rudd, V.Chuenchor, W.Bello, N.F.Bouamr, F.Xiao, T.S.

(2012) Structure 20: 887-898

  • DOI: 10.1016/j.str.2012.03.001
  • Primary Citation of Related Structures:  
    3UM3, 3ULY, 3UM0, 3UM1, 3UM2

  • PubMed Abstract: 
  • Interactions of the CHMP protein carboxyl terminal tails with effector proteins play important roles in retroviral budding, cytokinesis, and multivesicular body biogenesis. Here we demonstrate that hydrophobic residues at the CHMP4B C-terminal amphipathic α helix bind a concave surface of Brox, a mammalian paralog of Alix ...

    Interactions of the CHMP protein carboxyl terminal tails with effector proteins play important roles in retroviral budding, cytokinesis, and multivesicular body biogenesis. Here we demonstrate that hydrophobic residues at the CHMP4B C-terminal amphipathic α helix bind a concave surface of Brox, a mammalian paralog of Alix. Unexpectedly, CHMP5 was also found to bind Brox and specifically recruit endogenous Brox to detergent-resistant membrane fractions through its C-terminal 20 residues. Instead of an α helix, the CHMP5 C-terminal tail adopts a tandem β-hairpin structure that binds Brox at the same site as CHMP4B. Additional Brox:CHMP5 interface is furnished by a unique CHMP5 hydrophobic pocket engaging the Brox residue Y348 that is not conserved among the Bro1 domains. Our studies thus unveil a β-hairpin conformation of the CHMP5 protein C-terminal tail, and provide insights into the overlapping but distinct binding profiles of ESCRT-III and the Bro1 domain proteins.


    Organizational Affiliation

    Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BRO1 domain-containing protein BROXA411Homo sapiensMutation(s): 0 
Gene Names: BROFTIBROXC1orf58
UniProt & NIH Common Fund Data Resources
Find proteins for Q5VW32 (Homo sapiens)
Explore Q5VW32 
Go to UniProtKB:  Q5VW32
PHAROS:  Q5VW32
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Charged multivesicular body protein 4bB104Homo sapiensMutation(s): 0 
Gene Names: C20orf178CHMP4BSHAX1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H444 (Homo sapiens)
Explore Q9H444 
Go to UniProtKB:  Q9H444
PHAROS:  Q9H444
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.233 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 138.156α = 90
b = 138.156β = 90
c = 373.779γ = 120
Software Package:
Software NamePurpose
CBASSdata collection
PHASERphasing
CNSrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-04-18
    Type: Initial release
  • Version 1.1: 2012-05-23
    Changes: Database references