Anti-NQO2 Antibody Picoband® Fluoro647 Conjugated

NAD (P) H dehydrogenase, quinone 2, also known as QR2, is a protein that in humans is encoded by the NQO2 gene. This gene encodes a member of the thioredoxin family of enzymes. It is a cytosolic and ubiquitously expressed flavoprotein that catalyzes the two-electron reduction of quinone substrates and uses dihydronicotinamide riboside as a reducing coenzyme. Mutations in this gene have been associated with neurodegenerative diseases and several cancers. Alternative splicing results in multiple transcript variants.

General transcription and DNA repair factor IIH helicase subunit XPB; TFIIH subunit XPB; Basic transcription factor 2 89 kDa subunit; BTF2 p89; DNA excision repair protein ERCC-3; DNA repair protein complementing XP-B cells; TFIIH basal transcription factor complex 89 kDa subunit; TFIIH 89 kDa subunit; TFIIH p89; Xeroderma pigmentosum group B-complementing protein; ERCC3; XPB; XPBC

Mainly expressed in pachytene spermatocytes of testis and in lymphocyte-rich areas of spleen and lymph nodes. Isoform v1 is expressed in spleen. Isoform v2 is expressed in testis. Also detected in ovary, placenta, pancreas, cardiac fibroblasts. Expressed in B-cells and prostate malignant cells. Isoform v1 and isoform v3 are expressed in epithelial colorectal adenocarcinoma cells. Isoform v2 and isoform v4 are expressed in endothelial cells. Isoform v1, isoform v2, isoform v3 and isoform v4 are expressed in pulmonary artery smooth muscle cells. Isoform v2 and isoform v5 are expressed in microvascular endothelial cells (at protein level) .

Cancer, Cancer Metabolism, DNA/RNA, DNA Damage & Repair, Epigenetics and Nuclear Signaling, Metabolic Signaling Pathways, Metabolism, Metabolism Processes, Nucleotide Metabolism, Pathways and Processes, Response To Hypoxia

ATP-dependent 3'-5' DNA helicase, component of the general transcription and DNA repair factor IIH (TFIIH) core complex, which is involved in general and transcription-coupled nucleotide excision repair (NER) of damaged DNA and, when complexed to CAK, in RNA transcription by RNA polymerase II. In NER, TFIIH acts by opening DNA around the lesion to allow the excision of the damaged oligonucleotide and its replacement by a new DNA fragment. The ATPase activity of XPB/ERCC3, but not its helicase activity, is required for DNA opening. In transcription, TFIIH has an essential role in transcription initiation. When the pre-initiation complex (PIC) has been established, TFIIH is required for promoter opening and promoter escape. The ATP- dependent helicase activity of XPB/ERCC3 is required for promoter opening and promoter escape. Phosphorylation of the C-terminal tail (CTD) of the largest subunit of RNA polymerase II by the kinase module CAK controls the initiation of transcription.

1. Gaikwad, N. W., Yang, L., Rogan, E. G., Cavalieri, E. L. Evidence for NQO2-mediated reduction of the carcinogenic estrogen ortho-quinones. Free Radic. Biol. Med. 46: 253-262, 2009. 2. Jaiswal, A. K., Bell, D. W., Radjendirane, V., Testa, J. R. Localization of human NQO1 gene to chromosome 16q22 and NQO2-6p25 and associated polymorphisms. Pharmacogenetics 9: 413-418, 1999. 3. Jaiswal, A. K., Burnett, P., Adesnik, M., McBride, O. W. Nucleotide and deduced amino acid sequence of a human cDNA (NQO2) corresponding to a second member of the NAD (P) H:quinone oxidoreductase gene family: extensive polymorphism at the NQO2 gene locus on chromosome 6. (Abstract) Biochemistry 29: 1899-1906, 1990.