M. Vandermey et E. Devroom, SUBSTRATE-SPECIFICITY OF IMMOBILIZED PENICILLIN-G ACYLASE, Bioorganic & medicinal chemistry letters, 4(2), 1994, pp. 345-348
The substrate specificity of immobilized penicillin-Ci acylase towards
penicillin and cephalosporin derivatives was studied. The phenylacety
l moiety can be altered at the a-position with several small substitue
nts. Depending on polarity and size of the substituent, enzyme activit
y decreases or increases. Insertion or deletion of atoms between the a
romatic nucleus of the phenylacetyl group and the center of hydrolysis
leads to substrates that are no longer recognized by the enzyme.