Cloning and characterization of a Constitutive lysophosphatidic acid acyltransferase 2 (LPAT2) gene from Tropaeolum majus L.

D. Taylor, T. Francis, S. Lozinsky, Travis L. Hoffman, M. Giblin, E. Marillia
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引用次数: 16

Abstract

The cloning and characterization of a lyso-phosphatidic acid acyltransferase (LPAT2; EC 2.3.1.51) from Tropaeolum majus from a 20,000 EST collection is described. The 1358 bp TmLPAT2 gene encodes a 42.6 kD polypep- tide; the primary sequence has a membrane bound O-acyltransferase, MBOAT, Box I motif, and Boxes II, III and IV typical of LPATs from various species. Unlike many LPAT2s, the gene was constitutively expressed in all tissues. The TmLPAT2 functionality was confirmed by expression in a yeast LPAT deletion (SLC1 - ) mutant. The TmLPAT2 could use a range of acyl-CoAs as acyl donor, including 22:1-CoA and 20:1-CoA and either 18:1-LPA or 22:1-LPA as acyl acceptor. This new LPAT2 could enable the production of Brassica seed oils with enhanced levels of very long-chain fatty acids.
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大Tropaeolum maus L.组成型溶血磷脂酸酰基转移酶2 (LPAT2)基因的克隆与鉴定。
溶磷脂酸酰基转移酶(LPAT2)的克隆与鉴定描述了从20,000 EST收集的Tropaeolum majus中发现的EC 2.3.1.51)。TmLPAT2基因全长1358 bp,编码42.6 kD的多肽;初级序列具有膜结合o -酰基转移酶、MBOAT、盒I基序以及盒II、盒III和盒IV,这是来自不同物种的典型LPATs。与许多LPAT2s不同,该基因在所有组织中均有组成性表达。TmLPAT2的功能通过在酵母LPAT缺失(SLC1 -)突变体中的表达得到证实。TmLPAT2可以使用一系列酰基辅酶a作为酰基供体,包括22:1-CoA和20:1-CoA, 18:1-LPA或22:1-LPA作为酰基受体。这种新的LPAT2可以使油菜籽油的生产具有更高水平的超长链脂肪酸。
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