Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/112103
Title: The Caenorhabditis elegans unc-13 gene product is a phospholipid-dependent high-affinity phorbol ester receptor
Authors: Ahmed, S. 
Maruyama, I.N.
Kozma, R. 
Lee, J. 
Brenner, S.
Lim, L.
Issue Date: 1992
Citation: Ahmed, S.,Maruyama, I.N.,Kozma, R.,Lee, J.,Brenner, S.,Lim, L. (1992). The Caenorhabditis elegans unc-13 gene product is a phospholipid-dependent high-affinity phorbol ester receptor. Biochemical Journal 287 (3) : 995-999. ScholarBank@NUS Repository.
Abstract: The Caenorhabditis elegans unc-13 mutant is a member of a class of mutants that have un-coordinated movement. Mutations of the unc-13 gene cause diverse defects in C. elegans, including abnormal neuronal connections and modified synaptic transmission in the nervous system. unc-13 cDNA encodes a protein (UNC-13) of 1734 amino acid residues with a predicted molecular mass of 198 kDa and sequence identity to the C1/C2 regions but not to the catalytic domain of the ubiquitously expressed protein kinase C family [Maruyama and Brenner (1991) Proc. Natl. Acad. Sci. U.S.A. 88, 5729-5733]. To characterize the phorbol ester binding site of the UNC-13 protein, cDNA encoding the C1/C2-like regions (amino acid residues 546-940) was expressed in Escherichia Coli and the 43 kDa recombinant protein was purified. Phorbol ester binding to the 43 kDa protein was zinc- and phospholipid-dependent, stereospecific and of high affinity (K(d) 67 nM). UNC-13 specific antisera detected a protein of approx. 190 kDa in wild-type (N2) but not in mutant (e1019) C. elegans cell extracts. We conclude that UNC-13 represents a novel class of phorbol ester receptor.
Source Title: Biochemical Journal
URI: http://scholarbank.nus.edu.sg/handle/10635/112103
ISSN: 02646021
Appears in Collections:Staff Publications

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