Anti-PCNA Antibody Picoband®

Proliferating cell nuclear antigen (PCNA) is a DNA clamp that acts as a processivity factor for DNA polymerase δ in eukaryotic cells and is essential for replication. It is mapped to 20p12.3. The protein encoded by this gene is found in the nucleus and is a cofactor of DNA polymerase delta. The encoded protein acts as a homotrimer and helps increase the processivity of leading strand synthesis during DNA replication. In response to DNA damage, this protein is ubiquitinated and is involved in the RAD6-dependent DNA repair pathway. Two transcript variants encoding the same protein have been found for this gene. Pseudogenes of this gene have been described on chromosome 4 and on the X chromosome.

Angiogenesis, Cancer, Cardiovascular, Developmental Biology, Growth Factors, Growth Factors/Hormones, Invasion/Microenvironment, Neural Stem Cells, Neurogenesis, Neurology Process, Neuroscience, Organogenesis, Signal Transduction, Stem Cells

Auxiliary protein of DNA polymerase delta and is involved in the control of eukaryotic DNA replication by increasing the polymerase's processibility during elongation of the leading strand. Induces a robust stimulatory effect on the 3'-5' exonuclease and 3'-phosphodiesterase, but not apurinic-apyrimidinic (AP) endonuclease, APEX2 activities. Has to be loaded onto DNA in order to be able to stimulate APEX2. Plays a key role in DNA damage response (DDR) by being conveniently positioned at the replication fork to coordinate DNA replication with DNA repair and DNA damage tolerance pathways (PubMed:24939902) . Acts as a loading platform to recruit DDR proteins that allow completion of DNA replication after DNA damage and promote postreplication repair: Monoubiquitinated PCNA leads to recruitment of translesion (TLS) polymerases, while 'Lys-63'-linked polyubiquitination of PCNA is involved in error-free pathway and employs recombination mechanisms to synthesize across the lesion (PubMed:24695737) .

1. Moldovan GL, Pfander B, Jentsch S (May 18, 2007) . PCNA, the maestro of the replication fork. Cell. 129 (4) : 665–79. 2. Warbrick E (Mar 1998) . PCNA binding through a conserved motif. BioEssays. 20 (3) : 195–9. 3. Mailand N, Gibbs-Seymour I, Bekker-Jensen S (May 2013) . Regulation of PCNA-protein interactions for genome stability. Nature Reviews. Molecular Cell Biology. 14 (5) : 269–82.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.