The primary structure of Providencia rettgeri penicillin G amidase gene and its relationship to other gram negative amidases.

The nucleotide sequence of Penicillin G amidase (PA,E.C.3.5.1.11) of Providencia rettgeri was determined. We aligned our P. rettgeri PA with other known Gram negative periplasmically located beta-lactam amidases. The analysis revealed a high homology with other Enterobacteric amidases (60%-65%), while with similar Pseudomonas sp. amidases the homology exceeded 25%. These homologies indicate their common ancestry.