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首页> 外文期刊>The Journal of Antibiotics: An International Journal >KtzJ-dependent serine activation and O-methylation by KtzH for kutznerides biosynthesis
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KtzJ-dependent serine activation and O-methylation by KtzH for kutznerides biosynthesis

机译:KtzH依赖KtzJ的丝氨酸活化和O-甲基化用于库兹涅德生物合成

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摘要

Kutznerides are hexadepsipeptide antifungal and antimicrobial agents containing O-methyl-L-serine in their very unique peptidic backbone. During kutznerides biosynthesis, this O-methylated amino-acid residue is proposed to result from the action of an adenylation (A) domain present in KtzH, which is interrupted by the S-adenosylmethionine-binding-containing part of a methyltransferase. In this study, we co-expressed recombinant KtzH(A 4 MA 4 T 4) with its MbtH-like protein partner KtzJ and demonstrated the requirement for KtzJ in producing soluble and active KtzH(A 4 MA 4 T 4). We demonstrated the specificity of KtzH(A 4 MA 4 T 4) toward L-Ser and showed the activity of the partial methyltransferase enzyme in O-methylation of L-Ser after its covalent attachment to the thiolation domain of KtzH(A 4 MA 4 T 4). The insights gained from this work may guide future study and development of engineered interrupted adenylation domains for combinatorial biosynthetic methodologies.
机译:Kutznerides是六肽肽抗真菌剂和抗菌剂,在其非常独特的肽主链中包含O-甲基-L-丝氨酸。在库兹那利德生物合成过程中,该O-甲基化的氨基酸残基被认为是由KtzH中存在的腺苷酸化(A)结构域的作用导致的,该结构域被甲基转移酶的含S-腺苷甲硫氨酸结合的部分所中断。在这项研究中,我们与MbtH样蛋白伴侣KtzJ共表达了重组KtzH(A 4 MA 4 T 4),并证明了KtzJ在生产可溶性和活性KtzH(A 4 MA 4 T 4)中的需求。我们证明了KtzH(A 4 MA 4 T 4)对L-Ser的特异性,并显示了部分甲基转移酶在L-Ser的O-甲基化中的共价连接到KtzH(A 4 MA 4)的硫醇化结构域后的活性。 T 4)。从这项工作中获得的见识可以为组合生物合成方法的工程化打断腺苷酸化域的未来研究和开发提供指导。

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