Anti-XPA Antibody Picoband®

DNA repair protein complementing XP-A cells is a protein that in humans is encoded by the XPA gene. This gene encodes a zinc finger protein involved in DNA excision repair. The encoded protein is part of the NER (nucleotide excision repair) complext which is responsible for repair of UV radiation-induced photoproducts and DNA adducts induced by chemical carcinogens. Mutations in this gene are associated with xeroderma pigmentosum complementation group A. Alternatively spliced transcript variants have been found for this gene.

Involved in intracellular signal transduction mediated by cytokines and growth factors. When associated with STAM, it suppresses DNA signaling upon stimulation by IL-2 and GM-CSF. Could be a effector of PI3-kinase in vesicular pathway via early endosomes and may regulate trafficking to early and late endosomes by recruiting clathrin. May concentrate ubiquitinated receptors within clathrin-coated regions. Involved in down-regulation of receptor tyrosine kinase via multivesicular body (MVBs) when complexed with STAM (ESCRT-0 complex) . The ESCRT-0 complex binds ubiquitin and acts as sorting machinery that recognizes ubiquitinated receptors and transfers them to further sequential lysosomal sorting/trafficking processes. May contribute to the efficient recruitment of SMADs to the activin receptor complex. Involved in receptor recycling via its association with the CART complex, a multiprotein complex required for efficient transferrin receptor recycling but not for EGFR degradation.

1. Li L, Elledge SJ, Peterson CA, Bales ES, Legerski RJ (May 1994) . Specific association between the human DNA repair proteins XPA and ERCC1. Proceedings of the National Academy of Sciences of the United States of America. 91 (11) : 5012–6. 2. Nagai A, Saijo M, Kuraoka I, Matsuda T, Kodo N, Nakatsu Y, Mimaki T, Mino M, Biggerstaff M, Wood RD (Jun 1995) . Enhancement of damage-specific DNA binding of XPA by interaction with the ERCC1 DNA repair protein. Biochemical and Biophysical Research Communications. 211 (3) : 960–6.

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 freezing and thawing.