A BRCA1 coiled-coil domain variant disrupting PALB2 interaction promotes the development of mammary tumors and confers a targetable defect in homologous recombination repair
[Paper-level Aggregated] PMCID: PMC7612117
Evidence Type(s): Functional
Summary: Mutation: p.L1363P | Summary: The Brca1 p.L1363P variant alters molecular or biochemical function by disrupting the interaction with PALB2, impairing homologous recombination repair (HRR), and leading to defects in RAD51 foci formation in response to gamma-radiation. It has been shown to cause general growth defects in embryos and is functionally important as it compromises BRCA1-mediated HRR.
Evidence Type: Functional Mutation: p.L1407P | Summary: The p.L1407P variant disrupts the interaction of BRCA1 with PALB2 and is predicted to disable the alpha-helical structure of the coiled-coil domain, indicating a functional alteration. It is analyzed in the context of its potential phenocopy of p.L1363P, suggesting it may also affect molecular interactions and functions related to BRCA1.
Gene→Variant (gene-first): TP53BP1(7158):p.L1363P BRCA1(672):p.L1407P
Genes: TP53BP1(7158) BRCA1(672)
Variants: p.L1363P p.L1407P