A mitochondrial carrier gene, CG32103, is highly expressed in the corpora allata in the fruit fly Drosophila melanogaster (Diptera: Drosophilidae)
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Here we describe a novel gene that is highly expressed in the corpora allata, an endocrine organ responsible for synthesizing juvenile hormones (JHs), in the fruit fly, Drosophila melanogaster Meigen. We isolated an enhancer-trap line in which the transgene was inserted at the locus CG32103, which encodes a mitochondrial carrier family protein with calcium-binding motifs. RNA in situ hybridization revealed that CG32103 is predominantly expressed in the corpora allata in D. melanogaster larvae. Putative orthologs of CG32103 are conserved in many insect species. Mitochondrial carriers are responsible for transporting metabolites across the inner mitochondrial membrane. Given that both mitochondrial membrane transport and cytoplasmic calcium signaling are important for JH biosynthesis regulation, we speculated that CG32103 represents a new member of the family of JH biosynthesis regulators in insects.
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