1N5O

Structural consequences of a cancer-causing BRCA1-BRCT missense mutation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.274 
  • R-Value Observed: 0.275 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural consequences of a cancer-causing BRCA1-BRCT missense mutation

Williams, R.S.Glover, J.N.M.

(2003) J Biol Chem 278: 2630-2635

  • DOI: 10.1074/jbc.M210019200
  • Primary Citation of Related Structures:  
    1N5O

  • PubMed Abstract: 
  • The integrity of the carboxyl-terminal BRCT repeat region is critical for BRCA1 tumor suppressor function; however, the molecular details of how a number of clinically derived BRCT missense mutations affect BRCA1 function remain largely unknown. Here we assess the structural response of the BRCT tandem repeat domain to a well characterized, cancer-associated single amino acid substitution, Met-1775 --> Arg-1775 ...

    The integrity of the carboxyl-terminal BRCT repeat region is critical for BRCA1 tumor suppressor function; however, the molecular details of how a number of clinically derived BRCT missense mutations affect BRCA1 function remain largely unknown. Here we assess the structural response of the BRCT tandem repeat domain to a well characterized, cancer-associated single amino acid substitution, Met-1775 --> Arg-1775. The structure of BRCT-M1775R reveals that the mutated side chain is extruded from the protein hydrophobic core, thereby altering the protein surface. Charge-charge repulsion, rearrangement of the hydrophobic core, and disruption of the native hydrogen bonding network at the interface between the two BRCT repeats contribute to the conformational instability of BRCT-M1775R. Destabilization and global unfolding of the mutated BRCT domain at physiological temperatures explain the pleiotropic molecular and genetic defects associated with the BRCA1-M1775R protein.


    Organizational Affiliation

    Department of Biochemistry, 437 Medical Sciences Building, University of Alberta, Edmonton T6G 2H7, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Breast cancer type 1 susceptibility proteinA [auth X]214Homo sapiensMutation(s): 1 
Gene Names: BRCA1RNF53
EC: 2.3.2.27
Find proteins for P38398 (Homo sapiens)
Explore P38398 
Go to UniProtKB:  P38398
NIH Common Fund Data Resources
PHAROS:  P38398
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
C [auth X], D [auth X]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CO
Query on CO

Download Ideal Coordinates CCD File 
B [auth X]COBALT (II) ION
Co
XLJKHNWPARRRJB-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.274 
  • R-Value Observed: 0.275 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 114.535α = 90
b = 114.535β = 90
c = 121.527γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
CNSrefinement
HKL-2000data collection
HKL-2000data reduction
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-12-25
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance
  • Version 1.3: 2019-07-24
    Changes: Data collection, Refinement description