Knowles P F, Pandeya K B, Rius F X, Spencer C M, Moog R S, McGuirl M A, Dooley D M
Biochem J. 1987 Jan 15;241(2):603-8. doi: 10.1042/bj2410603.
Plasma amine oxidases (EC 1.4.3.6) are classified as containing the organic cofactor pyridoxal phosphate. Biochemical and bioassays on the pig plasma amine oxidase fail to reveal the presence of pyridoxal phosphate and 31P n.m.r. evidence is also inconsistent with pyridoxal phosphate in the enzyme. Resonance Raman spectral studies on phenylhydrazone derivatives of the pig and bovine plasma enzymes have been carried out and comparisons made with the corresponding derivatives of pyridoxal phosphate and pyrroloquinoline quinone (PQQ). The resonance Raman evidence indicates that the cofactor in both plasma amine oxidases is PQQ or a closely related species and not pyridoxal phosphate. The results substantiate earlier reports concerning the identity of the organic cofactor.
血浆胺氧化酶(EC 1.4.3.6)被归类为含有有机辅因子磷酸吡哆醛。对猪血浆胺氧化酶进行的生化和生物测定未能揭示磷酸吡哆醛的存在,并且31P核磁共振证据也与该酶中存在磷酸吡哆醛不一致。已经对猪和牛血浆酶的苯腙衍生物进行了共振拉曼光谱研究,并与磷酸吡哆醛和吡咯喹啉醌(PQQ)的相应衍生物进行了比较。共振拉曼证据表明,两种血浆胺氧化酶中的辅因子都是PQQ或与之密切相关的物质,而不是磷酸吡哆醛。这些结果证实了早期关于有机辅因子身份的报道。