8-Oxoguanine DNA Glycosylase (OGG1) Human Recombinant Protein

This gene encodes the enzyme responsible for the excision of 8-oxoguanine, a mutagenic base byproduct which occurs as a result of exposure to reactive oxygen. The action of this enzyme includes lyase activity for chain cleavage. Alternative splicing of the C-terminal region of this gene classifies splice variants into two major groups, type 1 and type 2, depending on the last exon of the sequence. Type 1 alternative splice variants end with exon 7 and type 2 end with exon 8. All variants share the N-terminal region in common, which contains a mitochondrial targeting signal that is essential for mitochondrial localization. Many alternative splice variants for this gene have been described, but the full-length nature for every variant has not been determined. [provided by RefSeq, Aug 2008]

OGG1: DNA repair enzyme that incises DNA at 8-oxoG residues. Excises 7,8-dihydro-8-oxoguanine and 2,6-diamino-4-hydroxy-5-N- methylformamidopyrimidine (FAPY) from damaged DNA. Has a beta- lyase activity that nicks DNA 3' to the lesion. Defects in OGG1 may be a cause of renal cell carcinoma (RCC). It is a heterogeneous group of sporadic or hereditary carcinoma derived from cells of the proximal renal tubular epithelium. It is subclassified into clear cell renal carcinoma (non-papillary carcinoma), papillary renal cell carcinoma, chromophobe renal cell carcinoma, collecting duct carcinoma with medullary carcinoma of the kidney, and unclassified renal cell carcinoma. Belongs to the type-1 OGG1 family. 8 isoforms of the human protein are produced by alternative splicing.

Protein type: EC 4.2.99.18; Lyase; DNA repair, damage; Deoxyribonuclease

Chromosomal Location of Human Ortholog: 3p26.2

Cellular Component: nucleoplasm; nuclear matrix; mitochondrion; nuclear speck

Molecular Function: protein binding; endonuclease activity; microtubule binding; oxidized purine base lesion DNA N-glycosylase activity; DNA N-glycosylase activity; damaged DNA binding; 8-oxo-7,8-dihydroguanine DNA N-glycosylase activity

Biological Process: response to drug; depurination; DNA repair; DNA catabolic process, endonucleolytic; response to estradiol stimulus; response to radiation; response to ethanol; regulation of transcription, DNA-dependent; base-excision repair, AP site formation; nucleotide-excision repair; base-excision repair; response to folic acid; regulation of protein import into nucleus, translocation; response to oxidative stress; acute inflammatory response; aging; negative regulation of apoptosis

Disease: Renal Cell Carcinoma, Nonpapillary