2JQK

VPS4B MIT-CHMP2B Complex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

ESCRT-III recognition by VPS4 ATPases.

Stuchell-Brereton, M.D.Skalicky, J.J.Kieffer, C.Karren, M.A.Ghaffarian, S.Sundquist, W.I.

(2007) Nature 449: 740-744

  • DOI: 10.1038/nature06172
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The ESCRT (endosomal sorting complex required for transport) pathway is required for terminal membrane fission events in several important biological processes, including endosomal intraluminal vesicle formation, HIV budding and cytokinesis. VPS4 ATP ...

    The ESCRT (endosomal sorting complex required for transport) pathway is required for terminal membrane fission events in several important biological processes, including endosomal intraluminal vesicle formation, HIV budding and cytokinesis. VPS4 ATPases perform a key function in this pathway by recognizing membrane-associated ESCRT-III assemblies and catalysing their disassembly, possibly in conjunction with membrane fission. Here we show that the microtubule interacting and transport (MIT) domains of human VPS4A and VPS4B bind conserved sequence motifs located at the carboxy termini of the CHMP1-3 class of ESCRT-III proteins. Structures of VPS4A MIT-CHMP1A and VPS4B MIT-CHMP2B complexes reveal that the C-terminal CHMP motif forms an amphipathic helix that binds in a groove between the last two helices of the tetratricopeptide-like repeat (TPR) of the VPS4 MIT domain, but in the opposite orientation to that of a canonical TPR interaction. Distinct pockets in the MIT domain bind three conserved leucine residues of the CHMP motif, and mutations that inhibit these interactions block VPS4 recruitment, impair endosomal protein sorting and relieve dominant-negative VPS4 inhibition of HIV budding. Thus, our studies reveal how the VPS4 ATPases recognize their CHMP substrates to facilitate the membrane fission events required for the release of viruses, endosomal vesicles and daughter cells.


    Organizational Affiliation

    Department of Biochemistry, Room 4100, 15 N. Medical Drive East, University of Utah, Salt Lake City, Utah 84112-5650, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Vacuolar protein sorting-associating protein 4B
A
89Homo sapiensMutation(s): 0 
Gene Names: VPS4B (SKD1, VPS42)
EC: 3.6.4.6
Find proteins for O75351 (Homo sapiens)
Go to Gene View: VPS4B
Go to UniProtKB:  O75351
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Charged multivesicular body protein 2b
B
19Homo sapiensMutation(s): 0 
Gene Names: CHMP2B
Find proteins for Q9UQN3 (Homo sapiens)
Go to Gene View: CHMP2B
Go to UniProtKB:  Q9UQN3
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2JQK Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-10-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance