Described is a method for the production of 3-hydroxy-3-methylbutyric acid (also referred to as beta-hydroxyisovalerate or HIV) from acetone and a compound which provides an activated acetyl group comprising the enzymatic conversion of acetone and a compound which provides an activated acetyl group into 3-hydroxy-3-methylbutyric acid. The conversion makes use of an enzyme which is capable of catalyzing the formation of a covalent bond between the carbon atom of the oxo (i.e. the C=O) group of acetone and the methyl group of the compound which provides an activated acetyl group. Preferably, the enzyme employed in the process is an enzyme with the activity of a HMG CoA synthase (EC 2.3.3.10) and/or a PksG protein and/or an enzyme with the activity of a C-C bond cleavage/condensation lyase, such as a HMG CoA lyase (EC 4.1.3.4). Also described are organisms which are able to produce 3-hydroxy-3-methylbutyric acid from acetone, a compound which provides an activated acetyl group, the use of the above-mentioned enzymes and organisms for the production of 3-hydroxy-3-methylbutyric acid as well as the use of acetone for the production of 3-hydroxy-3-methylbutyric acid.
本方法涉及从
丙酮和提供活化乙酰基的化合物中生产3-羟基-3-甲基
丁酸(也称为
β-羟基异戊酸或HIV)的方法,包括将
丙酮和提供活化乙酰基的化合物经酶催化转化为3-羟基-3-甲基
丁酸。转化利用一种能够催化
丙酮的羰基(即C=O)基团的碳原子和提供活化乙酰基的化合物的甲基团之间形成共价键的酶。最好采用的酶是具有
HMG CoA合成酶(
EC 2.3.3.10)和/或PksG蛋白质活性以及C-C键裂解/缩合裂解酶活性(例如
HMG CoA裂解酶(
EC 4.1.3.4))的酶。本方法还涉及能够从
丙酮和提供活化乙酰基的化合物中产生3-羟基-3-甲基
丁酸的
生物体,以及上述酶和
生物体用于生产3-羟基-3-甲基
丁酸的用途,以及
丙酮用于生产3-羟基-3-甲基
丁酸的用途。