Tags: Protein.
Serine beta-lactamase-like protein LACTB mitochondrial is an enzyme that in humans is encoded by the LACTB gene.This gene encodes a 54 kDa protein sharing significant sequence similarity to serine proteases of the penicillin binding protein and beta-lactamase superfamily occurring in bacteria.The amino acid residues necessary for serine protease activity in the bacterial penicillin binding proteins are conserved in LACTB indicating that LACTB has enzymatic activity although its enzymatic substrate remains unknown.