3E1R

Midbody targeting of the ESCRT machinery by a non-canonical coiled-coil in CEP55


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Midbody targeting of the ESCRT machinery by a noncanonical coiled coil in CEP55.

Lee, H.H.Elia, N.Ghirlando, R.Lippincott-Schwartz, J.Hurley, J.H.

(2008) Science 322: 576-580

  • DOI: 10.1126/science.1162042

  • PubMed Abstract: 
  • The ESCRT (endosomal sorting complex required for transport) machinery is required for the scission of membrane necks in processes including the budding of HIV-1 and cytokinesis. An essential step in cytokinesis is recruitment of the ESCRT-I complex ...

    The ESCRT (endosomal sorting complex required for transport) machinery is required for the scission of membrane necks in processes including the budding of HIV-1 and cytokinesis. An essential step in cytokinesis is recruitment of the ESCRT-I complex and the ESCRT-associated protein ALIX to the midbody (the structure that tethers two daughter cells) by the protein CEP55. Biochemical experiments show that peptides from ALIX and the ESCRT-I subunit TSG101 compete for binding to the ESCRT and ALIX-binding region (EABR) of CEP55. We solved the crystal structure of EABR bound to an ALIX peptide at a resolution of 2.0 angstroms. The structure shows that EABR forms an aberrant dimeric parallel coiled coil. Bulky and charged residues at the interface of the two central heptad repeats create asymmetry and a single binding site for an ALIX or TSG101 peptide. Both ALIX and ESCRT-I are required for cytokinesis, which suggests that multiple CEP55 dimers are required for function.


    Organizational Affiliation

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Centrosomal protein of 55 kDa
A, B
58Homo sapiensGene Names: CEP55 (C10orf3, URCC6)
Find proteins for Q53EZ4 (Homo sapiens)
Go to Gene View: CEP55
Go to UniProtKB:  Q53EZ4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Programmed cell death 6-interacting protein
C
13Homo sapiensGene Names: PDCD6IP (AIP1, ALIX, KIAA1375)
Find proteins for Q8WUM4 (Homo sapiens)
Go to Gene View: PDCD6IP
Go to UniProtKB:  Q8WUM4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.224 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 54.585α = 90.00
b = 61.150β = 90.00
c = 88.542γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
CNSrefinement
ADSCdata collection
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-11-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance