Drosophila CG10527 mutants are resistant to juvenile hormone and its analog methoprene.
Juvenile hormone (JH) is critical for development, metamorphosis, and reproduction in insects. While the physiological importance of JH has been appreciated for decades, its biosynthetic pathway and molecular action remain poorly understood. Drosophila CG10527 encodes a protein with high homology to crustacean farnesoic acid methyltransferase (FAMeT) that converts farnesoic acid to methyl farnesoate (MF), a precursor of JH, but its in vivo functions remain unclear. Here we report that CG10527 is expressed widely in secondary cells in the male accessory glands, in ovarian follicle cells, and in glial cells in the nervous system. Furthermore, CG10527 is expressed abundantly in the corpora allata where JH is synthesized. To understand the physiological functions of CG10527, we generated specific CG10527 deletions. Phenotypic analysis showed that CG10527 null mutants are fully viable and fertile in both sexes, indicating that CG10527 is not essential for survival and fertility. Surprisingly, CG10527 mutants showed no defects in the biosynthesis of MF and JH. However, CG10527 mutants were 3-5 times more resistant than wild-type flies to topically applied MF and JH as well as the JH analog methoprene at both sub-lethal and lethal doses. Taken together, our data indicate that Drosophila CG10527 plays little, if any, role in JH biosynthesis but may participate in the JH signaling pathway.
Zhang
Haiying
H
Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China.
Tian
Ling
L
Tobe
Stephen
S
Xiong
Ying
Y
Wang
Songyan
S
Lin
Xinda
X
Liu
Yanan
Y
Bendena
William
W
Li
Sheng
S
Zhang
Yong Q
YQ
D000818:Animals; D004331:Drosophila melanogaster / Q000187:drug effects* / Q000235:genetics; D005260:Female; D017353:Gene Deletion; D007605:Juvenile Hormones / Q000096:biosynthesis / Q000494:pharmacology*; D008297:Male; D008726:Methoprene / Q000494:pharmacology*; D009420:Nervous System / Q000378:metabolism; D009457:Neuroglia / Q000378:metabolism; D006080:Ovarian Follicle / Q000378:metabolism
D007605:Juvenile Hormones; D008726:Methoprene