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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Coordinated transcriptional regulation of the unc-25 glutamic acid decarboxylase and the unc-47 GABA vesicular transporter by the Caenorhabditis elegans UNC-30 homeodomain protein.

An important aspect of the specification of neuronal fate is the choice of neurotransmitter. In Caenorhabditis elegans the neurotransmitter GABA is synthesized by the UNC-25 glutamic acid decarboxylase (GAD) and packaged into synaptic vesicles by the UNC-47 transporter. Both unc-25 and unc-47 are expressed in 26 GABAergic neurons of five different types. Previously, we have identified that the unc-30 homeobox gene controls the fate of 19 type D GABAergic neurons. We report here that the UNC-30 homeodomain protein transcriptionally regulates the expression of unc-25 and unc-47 in the 19 type D neurons. UNC-30 bound to the unc-25 and unc-47 promoters sequence-specifically. Mutations in the UNC-30 binding sites of the unc-25 and unc-47 promoters abolished the expression of reporter genes in the D neurons. The ectopic expression of UNC-30 induced the ectopic expression of reporter genes driven by the wild-type unc-25 and unc-47 promoters. Our data establish a mechanism for cell type-specific transcriptional coregulation of genes required for the synthesis and packaging of the neurotransmitter GABA.[1]

References

  1. Coordinated transcriptional regulation of the unc-25 glutamic acid decarboxylase and the unc-47 GABA vesicular transporter by the Caenorhabditis elegans UNC-30 homeodomain protein. Eastman, C., Horvitz, H.R., Jin, Y. J. Neurosci. (1999) [Pubmed]
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