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裂合酶

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裂合酶(英语:lyase)是一种催化分解不同化学键,但不包括水解氧化反应,过程中通常会形成一个新的双键或一个新的环状结构。举例来说,若一种酶能催化以下的反应就是裂合酶:

裂合酶与其他酶不同的是它只需要一个底物就能催化反应,或在逆向反应中需要两个底物。

命名

裂合酶是以“(底物|底物团)裂合酶”这种格式来命名。普遍的名称包括脱羧酶、脱水酶、醛缩酶及其他。当逆向反应较重要时,会使用合酶的名称。

分类

裂合酶在EC编号中分类为EC4,并再细分为7个子类:

  • EC4.1包括分解C-C键的裂合酶,如脱羧酶(EC 4.1.1), 醛缩酶(EC 4.1.2)
  • EC4.2包括分解C-O键的裂合酶,如脱水酶英语Dehydratase
  • EC4.3包括分解C-N键的裂合酶
  • EC4.4包括分解C-S键的裂合酶
  • EC4.5包括分解碳键的裂合酶
  • EC4.6包括分解P-O键的裂合酶,如腺苷环化酶
  • EC4.99包括其他裂合酶

内部链接

外部链接

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裂合酶
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