Carlsson, Anders
- Department of Crop Science, Swedish University of Agricultural Sciences
Abstract
A gene encoding a sterol ester synthesizing enzyme was identified in Arabidopsis. The gene belongs to the LCAT/PDAT family and is the only intracellular enzyme so far found which catalyzes an acyl CoA-independent sterol ester formation. It catalyzes a transacylation of acyl groups from phospholipids to sterols. The enzyme was characterized not to utilize neutral lipids and with the highest activity with phosphatidylethanolamine and preference for the sn-2 position. It utilized both saturated and unsaturated fatty acids, with the highest activity towards polyunsaturated acyl groups. Various sterols and sterol intermediates, including triterpenic precursors, were acylated by the PSAT, whereas other triterpenes were not. The results presented implicate a role for AtPSAT in regulating both the amount and the quality of the free sterols in the membrane. They also suggest an involvement of AtPSAT in plant cold resistance
Published in
Acta Tropica
2005, pages: 651
Conference
ASBP Plant Biology 2005
SLU Authors
Stymne, Sten
- Department of Crop Science, Swedish University of Agricultural Sciences
- Department of Crop Science, Swedish University of Agricultural Sciences
UKÄ Subject classification
Food Science
Agricultural Science
Permanent link to this page (URI)
https://res.slu.se/id/publ/6757