| Autor: |
Jean-Paul Dubacq, C. Passaquet, D. Douady |
| Rok vydání: |
1989 |
| Předmět: |
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| Zdroj: |
Biological Role of Plant Lipids ISBN: 9781468413052 |
| Popis: |
The acyltransferases are enzymes catalyzing the first steps of membrane lipid biosynthesis by sucessive esterification of the glycerol-3-phosphate hydroxyl groups with fatty acids. The first acyltransferase which has been extensively studied by Frentzen“et al” (1983), is present ir. a soluble form in the stroma of chloroplasts where it catalyzes the reaction Acyl-ACP + glycerol-3-phosphate — lysophosphatidic acid + ACP. Depending on plants, several isoforms of this soluble acyltransferase are present. According to Murata (1983),the differences between plants in the selectivity of this acyltransferase for either saturated or monounsaturated fatty acids would be responsible for the occurence of disaturated lipids in chloroplasts and consequently for their chilling sensitivity.Furthermore, the activity of the two successive acyltransferases in chloroplast leads to 1-C18 -2-C16 glycerolipids which look like the cyanobacterial lipids. This similarity between chloroplast and cyanobacteria for their membrane lipid molecular species can be related to the endosymbiotic theory. Hence investigations concerning the acytransferases are of great interest for both these reasons. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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