Direct interaction of the Fanconi anaemia protein FANCG with BRCA2/FANCD1.

Abstract:

:Fanconi anaemia (FA) is an autosomal recessive genetic disorder characterized by progressive bone marrow failure, multiple congenital abnormalities, and an increased risk of cancer. FA cells are characterized by chromosomal instability and hypersensitivity to DNA interstrand crosslinking agents. At least eight complementation groups exist (FA-A to G), and the genes for all of these except FA-B have been cloned. Functional linkage between the FA pathway and genes involved in susceptibility to breast cancer has been demonstrated by the interaction of the FANCA and FANCD2 proteins with BRCA1, and the discovery that the FANCD1 gene is identical to BRCA2. Here we have used the yeast two-hybrid system to test for direct interaction between BRCA2 or its effector RAD51 and the FANCA, FANCC and FANCG proteins. We found that FANCG was capable of binding to two separate sites in the BRCA2 protein, located either side of the BRC repeats. Furthermore, FANCG could be co-immunoprecipitated with BRCA2 from human cells, and FANCG co-localized in nuclear foci with both BRCA2 and RAD51 following DNA damage with mitomycin C. These results demonstrate that BRCA2 is directly connected to a pathway that is deficient in interstrand crosslink repair, and that at least one other FA protein is closely associated with the homologous recombination DNA repair machinery.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Hussain S,Witt E,Huber PA,Medhurst AL,Ashworth A,Mathew CG

doi

10.1093/hmg/ddg266

subject

Has Abstract

pub_date

2003-10-01 00:00:00

pages

2503-10

issue

19

eissn

0964-6906

issn

1460-2083

pii

ddg266

journal_volume

12

pub_type

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