Synthesis of δ--α-aminoadipoyl--cysteinyl--allylglycine, and eight deuterated analogues, substrates for the investigation of the mechanism of action of isopenicillin n synthase.
摘要:
The synthesis of delta-L-alpha-aminoadipoyl-L-cysteinyl-D-allylglycine (1a) from its component amino acids is described, along with the synthesis of eight analogues (1b-i) specifically deuterated at C-3 and/or C-5 of the allylglycine residue.
Evidence for epoxide formation from isopenicillin N synthase
作者:Jack E. Baldwin、Robert M. Adlington、M. Bradley、N. J. Turner、A. R. Pitt
DOI:10.1039/c39890000978
日期:——
Isolation of a new β-lactam-containing metabolite, from incubation of the three deuteriated tripeptides (1b–d) with isopencillin Nsynthase (IPNS) has provided evidence of an epoxide type intermediate; a unified mechanism is proposed for the formation of products by IPNS from unsaturated precursors.
Penicillin biosynthesis: multiple pathways from a modified substrate
作者:Jack E. Baldwin、Robert M. Adlington、Andrew E. Derome、Hong-Hoi Ting、Nicholas J. Turner
DOI:10.1039/c39840001211
日期:——
Preparations of the enzyme isopenicillin N synthetase from Cephalosporium acremonium CO 728 convert the modified tripeptide substrate δ-(L-α-aminoadipoyl)-L-cysteingyl-D-allylgycine into penam, homoceph-3-em, hydroxycepham, and hydroxyhomocepham type products; these have been isolated and their structures established.
酶异青霉素N合成从制剂顶头孢霉CO 728转换修饰的三肽底物δ-(大号-α氨基己二酰) -大号-cysteingyl- d -allylgycine成青霉烷,homoceph-3-EM,hydroxycepham和hydroxyhomocepham型产品; 这些已经被隔离并建立了它们的结构。
Enzymic conversion of deuterated analogues of δ--α-aminoadipoyl--cysteinyl--allylglycine, an unnatural substrate for isopenicilin n synthase: A unified theory of second ring closure.
作者:Jack E. Baldwin、MarK Bradley、Nicholas J. Turner、Robert M. Adlington、Andrew R. Pitt、Andrew E. Derome
DOI:10.1016/s0040-4020(01)91016-6
日期:1991.9
The enzyme Isopenicillin N Synthase catalyses the conversion of the modified substrate delta-L-alpha-aminoadipoyl-L-cysteinyl-D-allylglycine to six beta-lactam containing metabolites. Eight tripeptides deuterated in the allylglycine moiety have been prepared and the stereochemical course of their cyclization to the beta-lactam containing metabolites has been investigated.