RPA32/RPA2 Recombinant Rabbit Monoclonal Antibody [JE45-59] (ET7109-41)

UNIPROT #

P15927

PROTEIN NAME

RPA32/RPA2

SYNONYMS

60S acidic ribosomal protein P1 antibody;AA409079 antibody;AI325195 antibody;AU020965 antibody;ik:tdsubc_2g1 antibody;M(2)21C antibody;MGC137236 antibody;OTTHUMP00000004008 antibody;p32 antibody;p34 antibody;RCJMB04_6d17 replication protein A2, 32kDa antibody;REPA2 antibody;Replication factor A protein 2 antibody;Replication protein A 32 kDa subunit antibody;Replication protein A 32kDa subunit antibody;Replication protein A 34 kDa subunit antibody;Replication protein A antibody;Replication Protein A2 (32kDa) antibody;Replication protein A2 antibody;Replication protein A2, 32kDa antibody;RF-A protein 2 antibody;Rf-A2 antibody;RFA antibody;RFA2_HUMAN antibody;RP-A p32 antibody;RP-A p34 antibody;RP21C antibody;RPA 2 antibody;RPA 32 antibody;RPA antibody;Rpa2 antibody;RPA32 antibody;RPA34 antibody;RpLP1 antibody;RpP2 antibody;xx:tdsubc_2g1 antibody;zgc:109822 antibody

SEQUENCE SIMILARITIES

Belongs to the replication factor A protein 2 family.

POST-TRANSLATIONAL MODIFICATION

Differentially phosphorylated throughout the cell cycle, becoming phosphorylated at the G1-S transition and dephosphorylated in late mitosis. Mainly phosphorylated at Ser-23 and Ser-29, by cyclin A-CDK2 and cyclin B-CDK1, respectively during DNA replication and mitosis. Dephosphorylation may require the serine/threonine-protein phosphatase 4. Phosphorylation at Ser-23 and Ser-29 is a prerequisite for further phosphorylation. Becomes hyperphosphorylated on additional residues including Ser-4, Ser-8, Thr-21 and Ser-33 in response to DNA damage. Hyperphosphorylation is mediated by ATM, ATR and PRKDC. Primarily recruited to DNA repair nuclear foci as a hypophosphorylated form it undergoes subsequent hyperphosphorylation, catalyzed by ATR. Hyperphosphorylation is required for RAD51 recruitment to chromatin and efficient DNA repair. Phosphorylation at Thr-21 depends upon RFWD3 presence.; DNA damage-induced 'Lys-63'-linked polyubiquitination by PRPF19 mediates ATRIP recruitment to the RPA complex at sites of DNA damage and activation of ATR. Ubiquitinated by RFWD3 at stalled replication forks in response to DNA damage: ubiquitination by RFWD3 does not lead to degradation by the proteasome and promotes removal of the RPA complex from stalled replication forks, promoting homologous recombination.

SUBCELLULAR LOCATION

Nucleus.

FUNCTION

As part of the heterotrimeric replication protein A complex (RPA/RP-A), binds and stabilizes single-stranded DNA intermediates, that form during DNA replication or upon DNA stress. It prevents their reannealing and in parallel, recruits and activates different proteins and complexes involved in DNA metabolism. Thereby, it plays an essential role both in DNA replication and the cellular response to DNA damage. In the cellular response to DNA damage, the RPA complex controls DNA repair and DNA damage checkpoint activation. Through recruitment of ATRIP activates the ATR kinase a master regulator of the DNA damage response. It is required for the recruitment of the DNA double-strand break repair factors RAD51 and RAD52 to chromatin in response to DNA damage. Also recruits to sites of DNA damage proteins like XPA and XPG that are involved in nucleotide excision repair and is required for this mechanism of DNA repair. Plays also a role in base excision repair (BER) probably through interaction with UNG. Also recruits SMARCAL1/HARP, which is involved in replication fork restart, to sites of DNA damage. May also play a role in telomere maintenance.