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J Insect Physiol

Title:		"Fatty acyl pheromone analogue-containing lipids and their roles in sex pheromone biosynthesis in the lightbrown apple moth, Epipyhas postvittana (Walker)"
Author(s):		Foster SP;
Address:		"The Horticulture and Food Research Institute of New Zealand, Mt. Albert Research Centre, Private Bag 92 169, Auckland, New Zealand"
Journal Title:		J Insect Physiol
Year:		2001
Volume:		47
Issue:		4-May
Page Number:		433 - 443
DOI:		10.1016/s0022-1910(00)00139-6
ISSN/ISBN:		1879-1611 (Electronic) 0022-1910 (Linking)
Abstract:		"The pheromone gland of the moth Epiphyas postvittana was analysed for lipids containing the fatty acyl pheromone analogue (FAPA) of the component, (E)-11-tetradecenyl acetate. The FAPA was found predominantly in the triglycerides (TGs), and to a lesser extent in the choline phosphatides. The FAPA was found to be exclusively on the sn-1 or sn-3 position (probably the latter) of the TGs. When pheromone gland lipid extracts were eluted through silica solid phase extraction, a significant proportion of the FAPA was not recovered. Changes in titre of this non-recoverable FAPA paralleled changes in pheromone titre in females. In contrast, changes in recoverable FAPA (mostly in the TGs) titre showed a gradual increase with time after eclosion. The properties of this non-recoverable FAPA were consistent with it being the CoA ester of the FAPA. Thus, it appears that the FAPA-CoA ester is the immediate lipid precursor of the pheromone, and that the FAPA-containing TGs are formed by reaction of the FAPA-CoA with 1,2-DGs, as a consequence of the rate-limiting reduction of the FAPA-CoA. Finally, injection of PBAN into females decapitated for 3 days resulted in a decrease in recoverable FAPA and an increase in non-recoverable FAPA, suggesting that PBAN influences the lipolysis of TGs. Overall these data suggest that there are two routes for biosynthesis of the pheromone component E11-14:OAc in E. postvittana: a de novo route, directly via the CoA esters of the various fatty acid intermediates, and a less direct route via the lipolysis of FAPA-containing TGs"
Keywords:
Notes:		"PubMed-not-MEDLINEFoster, S P eng England 2001/02/13 J Insect Physiol. 2001 Apr; 47(4-5):433-43. doi: 10.1016/s0022-1910(00)00139-6"