8r64
From Proteopedia
Cryo-EM structure of the FIGNL1 AAA hexamer bound to RAD51
Structural highlights
FunctionFIGL1_HUMAN Involved in DNA double-strand break (DBS) repair via homologous recombination (HR). Recruited at DSB sites independently of BRCA2, RAD51 and RAD51 paralogs in a H2AX-dependent manner. May regulate osteoblast proliferation and differentiation.[1] Publication Abstract from PubMedMaintaining genome integrity is an essential and challenging process. RAD51 recombinase, the central player of several crucial processes in repairing and protecting genome integrity, forms filaments on DNA. RAD51 filaments are tightly regulated. One of these regulators is FIGNL1, that prevents persistent RAD51 foci post-damage and genotoxic chromatin association in cells. The cryogenic electron microscopy structure of FIGNL1 in complex with RAD51 reveals that the FIGNL1 forms a non-planar hexamer and RAD51 N-terminus is enclosed in the FIGNL1 hexamer pore. Mutations in pore loop or catalytic residues of FIGNL1 render it defective in filament disassembly and are lethal in mouse embryonic stem cells. Our study reveals a unique mechanism for removing RAD51 from DNA and provides the molecular basis for FIGNL1 in maintaining genome stability. Molecular basis of FIGNL1 in dissociating RAD51 from DNA and chromatin.,Carver A, Yu TY, Yates LA, White T, Wang R, Lister K, Jasin M, Zhang X bioRxiv [Preprint]. 2024 Jul 16:2024.07.16.603765. doi: , 10.1101/2024.07.16.603765. PMID:39071279[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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