Alda-1 is an agonist and chemical chaperone for the common human aldehyde dehydrogenase 2 variant.

Alda-1 is an agonist and chemical chaperone for the common human aldehyde dehydrogenase 2 variant.
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DOI:
10.1038/nsmb.1737
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发表时间:
2010-02
影响因子:
16.8
通讯作者:
--
中科院分区:
生物学1区
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--
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在大约 10 亿人中,点突变使一种关键的解毒酶——乙醛脱氢酶 (ALDH2) 失活。这种线粒体酶代谢有毒的生物源和环境醛,包括内源产生的 4-羟基壬烯醛 (4HNE) 和环境污染物丙烯醛。 ALDH2 还能生物激活硝酸甘油,但它最出名的是其在乙醇代谢中的作用。即使饮用单一酒精饮料,乙醛的积累也会导致 ALDH2*2 纯合子出现亚洲酒精诱发的脸红综合症。 ALDH2*2 等位基因是半显性的,杂合个体表现出相似但不那么严重的表型。我们最近鉴定了一种小分子 Alda-1,它可以激活野生型 ALDH2 并恢复 ALDH2*2 接近野生型的活性。 Alda-1 与 ALDH2 和 ALDH2*2 结合的结构揭示了 Alda-1 如何激活野生型酶以及它如何通过充当结构伴侣来恢复 ALDH2*2 的活性。
In approximately one billion people, a point mutation inactivates a key detoxifying enzyme, aldehyde dehydrogenase (ALDH2). This mitochondrial enzyme metabolizes toxic biogenic and environmental aldehydes, including the endogenously produced 4-hydroxynonenal (4HNE) and the environmental pollutant, acrolein. ALDH2 also bioactivates nitroglycerin, but it is best known for its role in ethanol metabolism. The accumulation of acetaldehyde following the consumption of even a single alcoholic beverage leads to the Asian Alcohol-induced Flushing Syndrome in ALDH2*2 homozygotes. The ALDH2*2 allele is semi-dominant and heterozygotic individuals exhibit a similar, but not as severe phenotype. We recently identified a small molecule, Alda-1, which activates wild-type ALDH2 and restores near wild-type activity to ALDH2*2. The structures of Alda-1 bound to ALDH2 and ALDH2*2 reveal how Alda-1 activates the wild-type enzyme and how it restores the activity of ALDH2*2 by acting as a structural chaperone.
DOI: 10.1107/s0907444904019158
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