ABSTRACT
HbzF from
Pseudomonas alcaligenes
NCIMB 9867 was purified to homogeneity as a His-tagged protein and likely a dimer by SDS-PAGE and gel filtration. This protein was demonstrated to be a novel maleylpyruvate hydrolase, catalyzing direct hydrolysis of maleylpyruvate to maleate and pyruvate, and belongs to the fumarylacetoacetate hydrolase superfamily. This study reveals the genetic determinate for the direct maleylpyruvate hydrolysis in the gentisate pathway, complementary to the well-studied maleylpyruvate isomerization route.
摘要
HbzF
的 HbzF
NCIMB 9867 中的 HbzF 通过 SDS-PAGE 和凝胶过滤纯化为均一的 His 标记蛋白,并且很可能是二聚体。该蛋白被证明是一种新型马来酰丙酮酸水解酶,可催化马来酰丙酮酸直接水解为马来酸盐和丙酮酸盐,属于富马酸乙酰乙酸水解酶超家族。这项研究揭示了马来酰丙酮酸在庆大霉素途径中直接水解的遗传决定因素,是对已被充分研究的马来酰丙酮酸异构化途径的补充。