Biochem Biophys Res Commun:铜绿假单胞菌PAO1生物合成丙氨酸消旋酶的酶学表征和晶体结构

2018-07-03 MedSci MedSci原创

丙氨酸消旋酶是吡哆醛-5'-磷酸(PLP)依赖性酶,其可逆地催化1-丙氨酸转化为d-丙氨酸。 d-丙氨酸是许多原核细胞结构中的必需成分。抑制丙氨酸消旋酶可杀灭原核生物是致命的,因此可利用此特性设计抗菌药物。本研究中,我们报告了来自致病菌铜绿假单胞菌PAO1的生物合成丙氨酸消旋酶(Alr)的晶体结构。 结构研究表明,铜绿假单胞菌Alr(PaAlr)是保守的同二聚体结构。在活性位点观察到客体底物d-赖

丙氨酸消旋酶是吡哆醛-5'-磷酸(PLP)依赖性酶,其可逆地催化1-丙氨酸转化为d-丙氨酸。 d-丙氨酸是许多原核细胞结构中的必需成分。抑制丙氨酸消旋酶可杀灭原核生物是致命的,因此可利用此特性设计抗菌药物。本研究中,我们报告了来自致病菌铜绿假单胞菌PAO1的生物合成丙氨酸消旋酶(Alr)的晶体结构。

结构研究表明,铜绿假单胞菌Alr(PaAlr)是保守的同二聚体结构。在活性位点观察到客体底物d-赖氨酸,并构成双构象。两种缓冲离子,丙二酸和乙酸,在d-赖氨酸附近结合。生化表征揭示了PaAlr的最佳反应条件。

原始出处:

Dong H, Han Q, et al., Enzymatic characterization and crystal structure of biosynthetic alanine racemase from Pseudomonas aeruginosa PAO1. Biochem Biophys Res Commun. 2018 Jun 29. pii: S0006-291X(18)31474-8. doi: 10.1016/j.bbrc.2018.06.155.

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    2018-11-07 sunylz
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    2019-01-22 liuli5079
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    2018-07-03 1e1b8538m79(暂无匿称)

    不错的文章值得拥有哦

    0