title: Enzymatic dimerization of penicillin X.
abstract: Penicillin X methyl ester was transformed into three types of dimer by laccase from Coriolus versicolor. The dimers are considered to be formed by free-radical addition of phenoxy radicals produced by laccase. The enzyme reaction with the ester as substrate was more suitable for forming dimers than that with the sodium salt as substrate. Penicillin X pivaloyloxymethyl ester was also transformed into a dimer, which had antibacterial activity in the presence of esterase.
authors.affiliation: Central Research Laboratories, Mercian Co., Fujisawa, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Agematu
authors.forename: T
authors.initials: T
authors.lastname: Tsuchida
authors.forename: K
authors.initials: K
authors.lastname: Kominato
authors.forename: N
authors.initials: N
authors.lastname: Shibamoto
authors.forename: T
authors.initials: T
authors.lastname: Yoshioka
authors.forename: H
authors.initials: H
authors.lastname: Nishida
authors.forename: R
authors.initials: R
authors.lastname: Okamoto
authors.forename: T
authors.initials: T
authors.lastname: Shin
authors.forename: S
authors.initials: S
authors.lastname: Murao
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D002851:Chromatography, High Pressure Liquid; D004952:Esters; D005609:Free Radicals / Q000737:chemistry; D042845:Laccase; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D010088:Oxidoreductases / Q000737:chemistry*; D010400:Penicillin G / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology; D010406:Penicillins / Q000737:chemistry / Q000494:pharmacology; D013379:Substrate Specificity
chemical_list: D000900:Anti-Bacterial Agents; D004952:Esters; D005609:Free Radicals; D010406:Penicillins; C079817:XML 1; C079821:XML 4; C079818:XPL 1; C079819:XML 2; D010088:Oxidoreductases; D042845:Laccase; D010400:Penicillin G; C037825:penicillin X