3EAB

Crystal structure of Spastin MIT in complex with ESCRT III


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for midbody targeting of spastin by the ESCRT-III protein CHMP1B.

Yang, D.Rismanchi, N.Renvoise, B.Lippincott-Schwartz, J.Blackstone, C.Hurley, J.H.

(2008) Nat.Struct.Mol.Biol. 15: 1278-1286

  • DOI: 10.1038/nsmb.1512

  • PubMed Abstract: 
  • The endosomal sorting complex required for transport (ESCRT) machinery, including ESCRT-III, localizes to the midbody and participates in the membrane-abscission step of cytokinesis. The ESCRT-III protein charged multivesicular body protein 1B (CHMP1 ...

    The endosomal sorting complex required for transport (ESCRT) machinery, including ESCRT-III, localizes to the midbody and participates in the membrane-abscission step of cytokinesis. The ESCRT-III protein charged multivesicular body protein 1B (CHMP1B) is required for recruitment of the MIT domain-containing protein spastin, a microtubule-severing enzyme, to the midbody. The 2.5-A structure of the C-terminal tail of CHMP1B with the MIT domain of spastin reveals a specific, high-affinity complex involving a noncanonical binding site between the first and third helices of the MIT domain. The structural interface is twice as large as that of the MIT domain of the VPS4-CHMP complex, consistent with the high affinity of the interaction. A series of unique hydrogen-bonding interactions and close packing of small side chains discriminate against the other ten human ESCRT-III subunits. Point mutants in the CHMP1B binding site of spastin block recruitment of spastin to the midbody and impair cytokinesis.


    Organizational Affiliation

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, US Department of Health and Human Services, Bethesda, Maryland 20892, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Spastin
A, B, C, D, E, F
89Homo sapiensMutation(s): 0 
Gene Names: SPAST (ADPSP, FSP2, KIAA1083, SPG4)
EC: 5.6.1.1
Find proteins for Q9UBP0 (Homo sapiens)
Go to Gene View: SPAST
Go to UniProtKB:  Q9UBP0
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CHMP1b
G, H, I, J, K, L
50Homo sapiensMutation(s): 0 
Gene Names: CHMP1B (C18orf2)
Find proteins for Q7LBR1 (Homo sapiens)
Go to Gene View: CHMP1B
Go to UniProtKB:  Q7LBR1
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.232 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 151.967α = 90.00
b = 95.493β = 90.00
c = 100.360γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
SOLVEphasing
CNSrefinement
REFMACrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-11-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance