Analysis of the mouse and human acyl‐CoA thioesterase (ACOT) gene clusters shows that convergent, functional evolution results in a reduced number of human peroxisomal ACOTs<sup>1</sup>
作者:Mary C. Hunt、Anna Rautanen、Maria A. K. Westin、L. Thomas Svensson、Stefan E. H. Alexson
DOI:10.1096/fj.06-6042com
日期:2006.9
peroxisomes (ACOT3‐6). However, the corresponding human gene cluster contains only three genes (ACOT1, ACOT2, and ACOT4) coding for full‐length thioesterase proteins, of which only one is peroxisomal (ACOT4). We therefore set out to characterize the human genes, and we show here that the human ACOT4 protein catalyzes the activities of three mouse peroxisomal ACOTs (ACOT3, 4, and 5), being active on succinyl‐CoA
游离脂肪酸和酰基辅酶A(游离脂肪酸的活化形式)的细胞水平的维持极其重要,因为脂质代谢的不平衡会对人类健康造成严重后果。酰基辅酶 A (CoA) 硫酯酶 (ACOT) 将酰基辅酶 A 水解为游离脂肪酸和 CoASH,从而具有调节这些化合物的细胞内水平的潜力。我们之前鉴定并表征了一个小鼠 ACOT 基因簇,它由六个基因组成,这些基因显然是由编码酰基辅酶 A 硫酯酶的基因重复引起的,这些基因位于胞质溶胶 (ACOT1)、线粒体 (ACOT2) 和过氧化物酶体 (ACOT3-6) 中。然而,相应的人类基因簇仅包含三个编码全长硫酯酶蛋白的基因(ACOT1、ACOT2 和 ACOT4),其中只有一个是过氧化物酶体(ACOT4)。因此,我们着手表征人类基因,并在此表明人类 ACOT4 蛋白催化三种小鼠过氧化物酶体 ACOT(ACOT3、4 和 5)的活性,对琥珀酰辅酶 A 和中长链酰基辅酶 A 具有活性,而