title: The inhibitory mechanisms of glucose and carbon dioxide on the biosyntheses of penicillins and cephalosporins.
abstract: The inhibitory mechanism of glucose and CO2 on the biosyntheses of penicillins and cephalosporins is discussed in the present paper. 6-aminopenicillanic acid (6-APA) is considered to be an intermediate product, and the reaction between 6-APA and glucose may play an important role in the yield and rate of biosyntheses of beta-lactam antibiotics. According to this hypothesis the experimental phenomena taking place in biosynthesis of penicillin and cephalosporin, such as the inhibition by glucose and carbon dioxide and the reduction of the yield, can be satisfactorily explained. The stability of 6-aminopenicillanic acid (6-APA) in bicarbonate solution, the reaction of 6-APA with sugars, the determination of the concentration of the 6-APA-sugar compound and the effect of these reactions on the biosynthesis of penicillin G are investigated to present evidences for this hypothesis.
authors.affiliation: Institut für Technische Chemie, Universität Hannover, Germany.
authors.forename: Z F
authors.initials: ZF
authors.lastname: Yang
authors.forename: K
authors.initials: K
authors.lastname: Schügerl
authors.forename: L
authors.initials: L
authors.lastname: Lucas
mesh_terms: D000164:Acremonium / Q000378:metabolism; D000215:Acylation; D001709:Biotechnology; D050260:Carbohydrate Metabolism; D002245:Carbon Dioxide / Q000494:pharmacology; D002511:Cephalosporins / Q000096:biosynthesis*; D005947:Glucose / Q000494:pharmacology; D010397:Penicillanic Acid / Q000031:analogs & derivatives / Q000378:metabolism; D010400:Penicillin G / Q000378:metabolism; D010406:Penicillins / Q000096:biosynthesis*; D010408:Penicillium chrysogenum / Q000378:metabolism
chemical_list: D002511:Cephalosporins; D010406:Penicillins; D002245:Carbon Dioxide; D010397:Penicillanic Acid; D005947:Glucose; D010400:Penicillin G; C004408:aminopenicillanic acid