Sirtuin chemical mechanisms.

Sirtuin chemical mechanisms.
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DOI:
10.1016/j.bbapap.2010.01.021
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发表时间:
2010-08
期刊:
Biochimica et biophysica acta
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其他
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Sirtuins是一种古老的蛋白质,广泛分布于地球上的所有生命形式中。这些蛋白普遍能够结合NAD+,并激活它以实现细胞亲核试剂的ADP-核糖基化。最常观察到的沉默调节蛋白反应是乙酰赖氨酸的ADP三糖基化,其导致NAD+依赖性脱乙酰化。还观察到其他类型的ADP-核糖基化,包括蛋白质ADP-核糖基化、NAD+溶剂分解和ADP-核糖基转移至5,6-二甲基苯并咪唑,这是真细菌钴胺素生物合成中涉及的反应。本文综述了这些酶的化学和化学机制。
Sirtuins are ancient proteins widely distributed in all lifeforms of earth. These proteins are universally able to bind NAD+, and activate it to effect ADP-ribosylation of cellular nucleophiles. The most commonly observed sirtuin reaction, is the ADPribosylation of acetyllysine, which leads to NAD+-dependent deacetylation. Other types of ADP-ribosylation have also been observed, including protein ADP-ribosylation, NAD+ solvolysis and ADP-ribosyltransfer to 5,6-dimethylbenzimidazole, a reaction involved in eubacterial cobalamin biosynthesis. This review broadly surveys the chemistries and chemical mechanisms of these enzymes.
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