Actin-related protein 2/3 complex subunit 5 (ARPC5)

Component of the Arp2/3 complex, a multiprotein complex that mediates actin polymerization upon stimulation by nucleation- promoting factor (NPF) (PubMed:9230079). The Arp2/3 complex mediates the formation of branched actin networks in the cytoplasm, providing the force for cell motility (PubMed:9230079).

Besides its function in the cytoplasmic cytoskeleton, the Arp2/3 complex also promotes actin polymerization in the nucleus, thereby regulating gene transcription and repair of damaged DNA (PubMed:29925947). The Arp2/3 complex promotes homologous recombination (HR) repair in response to DNA damage by encouraging nuclear actin polymerization, leading to drive motility of double- strand breaks (DSBs) (PubMed:29925947).