Structural biology of S-adenosylmethionine decarboxylase.

Structural biology of S-adenosylmethionine decarboxylase.
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DOI:
10.1007/s00726-009-0404-y
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发表时间:
2010-02
期刊:
影响因子:
3.5
通讯作者:
Ealick, Steven E.
Ealick, Steven E.
中科院分区:
生物学3区
文献类型:
--
作者:
Bale, Shridhar;Ealick, Steven E.

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S-腺苷甲硫氨酸脱羧酶 (AdoMetDC) 是多胺生物合成途径中的关键酶,也是抗癌和抗寄生虫治疗的许多结构和生化研究的主题。该酶经历内部丝氨酸分解反应作为翻译后修饰,生成用于脱羧过程的活性位点丙酮酰基。来自智人、马铃薯、海栖热袍菌和 Aquifex aeolicus 的 AdoMetDC 晶体结构已确定。人类 AdoMetDC 和突变体的许多晶体结构为该酶的自动加工、腐胺激活、底物特异性和抑制剂设计的机制提供了见解。人类和马铃薯酶与 T. maritima 和 A. aeolicus 酶的比较支持了真核酶通过基因复制和融合进化的假设。与加工和活性有关的残基在所有形式的酶中在结构上都是保守的,这表明 AdoMetDC 存在不同的进化。
S-Adenosylmethionine decarboxylase (AdoMetDC) is a critical enzyme in the polyamine biosynthetic pathway and a subject of many structural and biochemical investigations for anti-cancer and anti-parasitic therapy. The enzyme undergoes an internal serinolysis reaction as a post-translational modification to generate the active site pyruvoyl group for the decarboxylation process. The crystal structures of AdoMetDC from Homo sapiens, Solanum tuberosum, Thermotoga maritima, and Aquifex aeolicus have been determined. Numerous crystal structures of human AdoMetDC and mutants have provided insights into the mechanism of autoprocessing, putrescine activation, substrate specificity, and inhibitor design to the enzyme. The comparison of the human and potato enzyme with the T. maritima and A. aeolicus enzymes supports the hypothesis that the eukaryotic enzymes evolved by gene duplication and fusion. The residues implicated in processing and activity are structurally conserved in all forms of the enzyme, suggesting a divergent evolution of AdoMetDC.
DOI: 10.1016/s0969-2126(99)80074-4
发表时间: 1999-05-01
期刊: STRUCTURE
影响因子: 5.7
作者:
Ekstrom, JL;Mathews, II;Ealick, SE
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影响因子: 7.3
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发表时间: 2003-12-01
期刊: EMBO JOURNAL
影响因子: 11.4
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发表时间: 2001-08-14
期刊: BIOCHEMISTRY
影响因子: 2.9
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DOI: 10.1021/bi025682c
发表时间: 2002-06-18
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Markham, GD;Norrby, PO;Bock, CW
通讯作者: Bock, CW