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Caenorhabditis elegans unc-51 gene required for axonal elongation encodes a novel serine/threonine kinase.

Genes & development | Oct 15, 1994

Mutations in the unc-51 gene of the nematode Caenorhabditis elegans result in various abnormalities in axonal elongation and axonal structures. We cloned the unc-51 gene by tagging with the transposon Tc1. The wild-type unc-51 gene, which rescued the mutant phenotypes, encodes a novel serine/threonine kinase of 856 amino acids. Mutation sites were identified in the unc-51 gene of six mutants. A Lys-->Met mutation created in vitro in the kinase domain led to the loss of rescuing activity and was dominant negative, indicating that the kinase domain of Unc-51 is essential for the function. Expression of an unc-51/lacZ fusion gene was observed in many neurons at all stages. We propose that protein phosphorylation by the unc-51 product is important for axonal elongation and possibly for axonal guidance.

Pubmed ID: 7958904 RIS Download

Mesh terms: Alleles | Amino Acid Sequence | Animals | Axons | Base Sequence | Caenorhabditis elegans | Cloning, Molecular | DNA Transposable Elements | DNA, Complementary | DNA, Helminth | Female | Gene Expression Regulation, Developmental | Genes, Helminth | Molecular Sequence Data | Nerve Net | Point Mutation | Protein-Serine-Threonine Kinases | Sequence Homology, Amino Acid | Sequence Tagged Sites

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