CELE_ZK637.5, tag-205, ZK637.5

asna-1 encodes a putative membrane transporter that is required, non-cell-autonomously, for L1 larvae to proceed through development when fed, and is also required for normal insulin (DAF-28) secretion; the human ASNA1 ortholog stimulates insulin secretion in pancreatic beta cells, and can transgenically rescue asna-1 mutant C. elegans, suggesting that ASNA-1's function is conserved among metazoa; asna-1 mutants only progress to adulthood when rescued by maternal ASNA-1; without maternal rescue, asna-1 mutants eat food and endocytose nutrients normally, but nevertheless arrest growth as L1 larvae and localize DAF-16 to the nucleus as if food were absent; asna-1 is expressed in some sensory neurons, in insulin-producing intestinal cells, and in hypodermis; ASNA-1 positively regulates dauer exit in the same way that overexpression of the insulins DAF-28 or INS-4 does, and requires DAF-28 to do this efficiently; ASNA-1 has ATPase activity in vitro, and this activity is required for transgenic rescue of asna-1 mutations.

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