Identification and characterisation of shunt metabolites from isopenicillin N synthase
作者:Jack E. Baldwin、Robert M. Adlington、Mark Bradley、William J. Norris、Nicholas J. Turner、Akira Yoshida
DOI:10.1039/c39880001125
日期:——
[(5S)-5-amino-5-carboxypentanoyl]-L-[3-13C]cysteinyl-D-[15N,3-2H]valine with isopenicillinNsynthase (IPNS) resulted in the observation of a ‘shuntmetabolite’, which we believe is formed from the collapse of an enzyme-bound monocyclic β-lactam intermediate, and which from chemical studies has been shown not to be derived from the decomposition of a free thiol monocyclic β-lactam.
BALDWIN, JACK E.;ADLINGTON, ROBERT M.;BRADLEY, MARK;NORRIS, WILLIAM J.;TU+, J. CHEM. SOC. CHEM. COMMUN.,(1988) N 16, C. 1125-1128
作者:BALDWIN, JACK E.、ADLINGTON, ROBERT M.、BRADLEY, MARK、NORRIS, WILLIAM J.、TU+
DOI:——
日期:——
Further evidence for the involvement of a monocyclic β-lactam in the enzymatic conversion of δ-L-α-aminoadipoyl-L-cysteinyl-D-valine into isopenicillin N.
Incubation of δ--α-aminoadipoyl--[3-13Ccysteinyl--[3-2H]valine with IsopenicillinNSynthase (IPNS) resulted in the observation of a ‘shuntmetabolite’, which we believe is formed from the collapse of an enzyme bound monocyclic β-lactam intermediate. Chemical studies into the origin of the shuntmetabolite suggest its formation occurred after initial β-lactam ring closure. Further chemical studies