A Lamin-Binding Ligand Inhibits Homologous Recombination Repair of DNA Double-Strand Breaks.

ABSTRACT: Nuclear lamins are type V intermediate filament proteins. Lamins, including LA, LB1, LB2, and LC, are the major protein components forming the nuclear lamina to support the mechanical stability of the mammalian cell nucleus. Increasing evidence has shown that LA participates in homologous recombination (HR) repair of DNA double-strand breaks (DSBs) . However, the mechanisms underlying this process are incompletely understood. We recently identified the first lamin-binding ligand 1 (LBL1) that directly binds LA and inhibited cancer cell growth. We provided here further mechanistic investigations of LBL1 and revealed that LA interacts with the HR recombinase Rad51 to protect Rad51 from degradation. LBL1 inhibits LA-Rad51 interaction leading to accelerated proteasome-medi

SUBMITTER: Li BX 

PROVIDER: S-EPMC6161055 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature