UniProt functional annotation for P42371

UniProt code: P42371.

Organism: Lactococcus lactis subsp. cremoris (Streptococcus cremoris).
Taxonomy: Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae; Lactococcus.
 
Function: Involved in base excision repair of DNA damaged by oxidation or by mutagenic agents. Acts as DNA glycosylase that recognizes and removes damaged bases. Has a preference for oxidized purines, such as 7,8-dihydro-8-oxoguanine (8-oxoG). Has AP (apurinic/apyrimidinic) lyase activity and introduces nicks in the DNA strand. Cleaves the DNA backbone by beta-delta elimination to generate a single-strand break at the site of the removed base with both 3'- and 5'-phosphates.
 
Catalytic activity: Hydrolysis of DNA containing ring-opened 7- methylguanine residues, releasing 2,6-diamino-4-hydroxy-5-(N- methyl)formamidopyrimidine.
Catalytic activity: The C-O-P bond 3' to the apurinic or apyrimidinic site in DNA is broken by a beta-elimination reaction, leaving a 3'-terminal unsaturated sugar and a product with a terminal 5'-phosphate.
Cofactor: Binds 1 zinc ion per subunit.
Subunit: Monomer.
Miscellaneous: The zinc finger is important for DNA binding.
Similarity: Belongs to the FPG family.
Similarity: Contains 1 FPG-type zinc finger.

Annotations taken from UniProtKB at the EBI.