Structural basis for budding by the ESCRTIII factor CHMP3

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.261 

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This is version 1.3 of the entry. See complete history


Structural Basis for Budding by the ESCRT-III Factor CHMP3.

Pineda-Molina, E.Ravelli, R.B.Zamborlini, A.Usami, Y.Weissenhorn, W.

(2006) Dev Cell 10: 821-830

  • DOI: https://doi.org/10.1016/j.devcel.2006.03.013
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The vacuolar protein sorting machinery regulates multivesicular body biogenesis and is selectively recruited by enveloped viruses to support budding. Here we report the crystal structure of the human ESCRT-III protein CHMP3 at 2.8 A resolution. The core structure of CHMP3 folds into a flat helical arrangement that assembles into a lattice, mainly via two different dimerization modes, and unilaterally exposes a highly basic surface. The C terminus, the target for Vps4-induced ESCRT disassembly, extends from the opposite side of the membrane targeting region. Mutations within the basic and dimerization regions hinder bilayer interaction in vivo and reverse the dominant-negative effect of a truncated CHMP3 fusion protein on HIV-1 budding. Thus, the final steps in the budding process may include CHMP protein polymerization and lattice formation on membranes by employing different bilayer-recognizing surfaces, a function shared by all CHMP family members.

  • Organizational Affiliation

    European Molecular Biology Laboratory, 6 rue Jules Horowitz, 38042 Grenoble, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Charged multivesicular body protein 3
A, B, C, D
179Homo sapiensMutation(s): 12 
Gene Names: CHMP3
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y3E7 (Homo sapiens)
Explore Q9Y3E7 
Go to UniProtKB:  Q9Y3E7
GTEx:  ENSG00000115561 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Y3E7
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
A, B, C, D
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.261 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.58α = 68.68
b = 72.57β = 83.61
c = 89.23γ = 76.7
Software Package:
Software NamePurpose
ProDCdata collection
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-06-13
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description