Replication protein A 32 kDa subunit

UniProtKB accession:  A0A0U8TRG9

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Component of the heterotrimeric replication protein A (RPA) and holoenzyme telomerase ribonucleoprotein complexes (PubMed:26472759, PubMed:27895115). As part of the RPA complex, binds and stabilizes single-stranded DNA (ssDNA) intermediates, that form during DNA replication or upon DNA stress (By similarity). It prevents their reannealing and in parallel, recruits and activates different proteins and complexes involved in DNA metabolism (By similarity). Thereby, it plays an essential role both in DNA replication and the cellular response to DNA damage (By similarity). In the cellular response to DNA damage, the RPA complex controls DNA repair and DNA damage checkpoint activation (By similarity). Also part of a subcomplex of the holoenzyme telomerase ribonucleoprotein complex: this subcomplex that contains TEB1, RPA2/TEB2, RPA3/TEB3, but not RPA1, mediates the recruitment of telomerase to telomeric DNA via specific interaction between TEB1 and telomeric ssDNA (PubMed:27895115). In the holoenzyme telomerase ribonucleoprotein complex, RPA2/TEB2 and RPA3/TEB3 act as assembly factors for TEB1 incorporation into telomerase holoenzyme (PubMed:27895115). In the holoenzyme telomerase ribonucleoprotein complex, RPA2/TEB2 does not contribute to ssDNA affinity, while it contributes to ssDNA affinity in the RPA complex (PubMed:27895115).