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1n5o
From Proteopedia
Contents |
Structural consequences of a cancer-causing BRCA1-BRCT missense mutation
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.
Structural consequences of a cancer-causing BRCA1-BRCT missense mutation., Williams RS, Glover JN, J Biol Chem. 2003 Jan 24;278(4):2630-5. Epub 2002 Nov 8. PMID:12427738
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
Disease
Known disease associated with this structure: Breast cancer-1 OMIM:[113705], Breast-ovarian cancer OMIM:[113705], Ovarian cancer OMIM:[113705], Papillary serous carcinoma of the peritoneum OMIM:[113705]
About this Structure
1N5O is a 1 chain structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
- Williams RS, Glover JN. Structural consequences of a cancer-causing BRCA1-BRCT missense mutation. J Biol Chem. 2003 Jan 24;278(4):2630-5. Epub 2002 Nov 8. PMID:12427738 doi:10.1074/jbc.M210019200
Page seeded by OCA on Wed Feb 18 00:06:44 2009

