Expression of penicillin G acylase gene from Bacillus megaterium ATCC 14945 in Escherichia coli and Bacillus subtilis.
Penicillin G acylase gene from Bacillus megaterium ATCC 14945 has been isolated. Recombinant Escherichia coli clones were screened for clear halo forming activity on the lawn of Staphylococcus aureus ATCC 6538P using the enzymatic acylating reaction of 7-aminodeacetoxycephalosporanic acid (7-ADCA) and D-(alpha)-phenylglycine methylester. The gene was contained within a 2.8 kb DNA fragment and expressed efficiently when transferred from E. coli to Bacillus subtilis. A twenty times greater amount of enzyme was produced in B. subtilis transformant than that in B. megaterium. The purified enzyme from subcloned B. subtilis showed that the native enzyme consisted of two identical subunits, each with a molecular weight of 57,000. The enzyme was able to react on various cephalosporins, i.e., cephalothin, cefamandole, cephaloridine, cephaloglycin, cephalexin and cephradine.
Department of Biological Science and Engineering, Korea Advanced Institute of Science and Technology, Seoul.
J H
JH
Kang
Y
Y
Hwang
O J
OJ
Yoo
D001410:Bacillus megaterium / Q000201:enzymology / Q000235:genetics*; D001412:Bacillus subtilis / Q000235:genetics; D001426:Bacterial Proteins / Q000096:biosynthesis* / Q000235:genetics; D002511:Cephalosporins / Q000378:metabolism; D004926:Escherichia coli / Q000235:genetics; D015971:Gene Expression Regulation, Enzymologic; D005822:Genetic Vectors; D008970:Molecular Weight; D010399:Penicillin Amidase / Q000096:biosynthesis* / Q000235:genetics; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis*; D013045:Species Specificity; D013379:Substrate Specificity
D001426:Bacterial Proteins; D002511:Cephalosporins; D011993:Recombinant Fusion Proteins; D010399:Penicillin Amidase