title: A phorbol ester/diacylglycerol-binding protein encoded by the unc-13 gene of Caenorhabditis elegans.
abstract: Mutations in the unc-13 gene cause diverse defects in the nervous system of the nematode Caenorhabditis elegans. Molecular cloning of the gene and sequencing of the cDNA revealed that the product encodes a protein, 1734 amino acids in length, with a central domain with sequence similarity to the regulatory region of protein kinase C. The domain was expressed in Escherichia coli and shown to bind specifically to a phorbol ester in the presence of calcium; diacylglycerol inhibited the binding in a competitive manner. These findings confirm that the unc-13 gene product has binding sites similar to those of protein kinase C and may be a component of an alternative transduction pathway of the diacylglycerol signal to a different effector function in the nervous system.
authors.affiliation: Medical Research Council Molecular Genetics Unit, Cambridge, United Kingdom.
authors.forename: I N
authors.initials: IN
authors.lastname: Maruyama
authors.forename: S
authors.initials: S
authors.lastname: Brenner
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002107:Caenorhabditis / Q000235:genetics*; D029742:Caenorhabditis elegans Proteins; D002352:Carrier Proteins; D002874:Chromosome Mapping; D004247:DNA / Q000235:genetics; D005796:Genes; D008969:Molecular Sequence Data; D015240:Phorbol 12,13-Dibutyrate / Q000378:metabolism; D011493:Protein Kinase C / Q000502:physiology; D011955:Receptors, Drug / Q000235:genetics*; D011994:Recombinant Proteins / Q000378:metabolism; D015183:Restriction Mapping
chemical_list: D029742:Caenorhabditis elegans Proteins; D002352:Carrier Proteins; D011955:Receptors, Drug; D011994:Recombinant Proteins; C083141:phorbol ester binding protein; C027776:phorbol ester receptor; D015240:Phorbol 12,13-Dibutyrate; D004247:DNA; D011493:Protein Kinase C