RPA4 Peptide - Middle Region Blocking Peptide

This gene encodes a single-stranded DNA-binding protein that is the 30-kDa subunit of the replication protein A complex. Replication protein A is an essential factor for DNA double-strand break repair and cell cycle checkpoint activation. The encoded protein localizes to DNA repair foci and may be involved in the cellular DNA damage response. This protein may also play a role in inhibiting viral replication.[provided by RefSeq, Apr 2010]

RPA4: functions as component of the alternative replication protein A complex (aRPA). aRPA binds single-stranded DNA and probably plays a role in DNA repair; it does not support chromosomal DNA replication and cell cycle progression through S-phase. In vitro, aRPA cannot promote efficient priming by DNA polymerase alpha but supports DNA polymerase delta synthesis in the presence of PCNA and replication factor C (RFC), the dual incision/excision reaction of nucleotide excision repair and RAD51-dependent strand exchange. Component of the alternative replication protein A complex (aRPA) composed of RPA1, RPA3 and RPA4. Interacts with RPA1 and RPA3. Localizes to DNA repair foci after DNA damage.

Chromosomal Location of Human Ortholog: Xq21.33

Cellular Component: nucleoplasm; DNA replication factor A complex; nucleus

Molecular Function: single-stranded DNA binding

Biological Process: DNA replication initiation; nucleotide-excision repair; DNA damage checkpoint; DNA replication during S phase; mitotic cell cycle; G1/S transition of mitotic cell cycle; DNA recombination