Purification and characterization of extracellular penicillin V acylase from Fusarium sp. SKF 235.
Hindustan Antibiot Bull
;
1995 Feb-Nov; 37(1-4): 9-15
Article
in English
| IMSEAR
| ID: sea-2595
ABSTRACT
Penicillin V acylase from Fusarium sp. SKF 235 culture filtrate was purified to homogeneity. The enzyme was a glycoprotein and composed of single polypeptide chain with molecular weight of 83,200 Daltons. The pH and temperature optima were 6.5 and 55 degrees C, respectively. The KM for penicillin V was 10 mM but the enzyme was inhibited by penicillin V at concentrations above 50 mM. Products of reaction, 6-aminopenicillanic acid and phenoxyacetic acid inhibited the enzyme competitively and noncompetitively with Ki values of 18 mM and 45 mM, respectively. The enzyme specifically hydrolyzed penicillin V, cephalosporanic acid V and penicillin V sulphoxide. Other phenoxy acetyl amides studied were not hydrolysed. It is proposed that phenoxyacetyl moiety alone is not recognized by the penicillin V acylase and in addition, the beta-lactam structure contributes in formation of enzyme-substrate complex.
Full text:
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Index:
IMSEAR (South-East Asia)
Main subject:
Penicillin Amidase
/
Phenoxyacetates
/
Substrate Specificity
/
Temperature
/
Binding, Competitive
/
Cephalosporins
/
Penicillin V
/
Penicillanic Acid
/
Culture Media
/
Electrophoresis, Polyacrylamide Gel
Language:
English
Journal:
Hindustan Antibiot Bull
Year:
1995
Type:
Article
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