2ETX

Crystal Structure of MDC1 Tandem BRCT Domains


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.33 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Molecular Basis for the Association of Microcephalin (MCPH1) Protein with the Cell Division Cycle Protein 27 (Cdc27) Subunit of the Anaphase-promoting Complex.

Singh, N.Wiltshire, T.D.Thompson, J.R.Mer, G.Couch, F.J.

(2012) J.Biol.Chem. 287: 2854-2862

  • DOI: 10.1074/jbc.M111.307868
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Microcephalin (MCPH1), the first gene identified as causative for primary recessive autosomal microcephaly, is aberrantly expressed in autism-like disorders and human malignancy of breast and ovarian origin. MCPH1, the encoded protein product, has be ...

    Microcephalin (MCPH1), the first gene identified as causative for primary recessive autosomal microcephaly, is aberrantly expressed in autism-like disorders and human malignancy of breast and ovarian origin. MCPH1, the encoded protein product, has been implicated in various cellular processes including the DNA damage checkpoint, DNA repair, and transcription. Although our understanding of the cellular context in which MCPH1 operates continues to develop, a structural understanding of the C-terminal tandem BRCT domains of MCPH1 remains unexplored. Here, we identify cell division cycle protein 27 (Cdc27), a component of the anaphase-promoting complex (APC/C), as a novel interacting partner of MCPH1. We provide in vitro and in vivo evidence that the C-terminal tandem BRCT domains of MCPH1 (C-BRCTs) bind Cdc27 in a phosphorylation-dependent manner. To characterize this interaction further, we determined the structure of MCPH1 C-BRCTs in complex with a phosphorylated Cdc27 peptide (pCdc27) using x-ray crystallography. Based on this structure, we identified single amino acid mutations targeted at the binding interface that disrupted the MCPH1-pCdc27 interaction. Collectively, our data define the biochemical, structural, and cellular determinants of the novel interaction between MCPH1 and Cdc27 and suggest that this interaction may occur within the larger context of MCPH1-APC/C.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mediator of DNA damage checkpoint protein 1
A, B
209Homo sapiensMutation(s): 0 
Gene Names: MDC1 (KIAA0170, NFBD1)
Find proteins for Q14676 (Homo sapiens)
Go to Gene View: MDC1
Go to UniProtKB:  Q14676
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.33 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.202 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 41.890α = 70.98
b = 44.350β = 86.45
c = 63.100γ = 61.91
Software Package:
Software NamePurpose
HKL-2000data scaling
REFMACrefinement
SOLVEphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-15
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2011-12-28
    Type: Database references
  • Version 1.4: 2012-02-22
    Type: Database references