title: The molecular identities of the Caenorhabditis elegans intraflagellar transport genes dyf-6, daf-10 and osm-1.
abstract: The Caenorhabditis elegans genes dyf-6, daf-10, and osm-1 are among the set of genes that affect chemotaxis and the ability of certain sensory neurons to take up fluorescent dyes from the environment. Some genes in this category are known to be required for intraflagellar transport (IFT), which is the bidirectional movement of raft-like particles along the axonemes of cilia and flagella. The cloning of dyf-6, daf-10, and osm-1 are described here. The daf-10 and osm-1 gene products resemble each other and contain WD and WAA repeats. DYF-6, the product of a complex locus, lacks known motifs, but orthologs are present in flies and mammals. Phenotypic analysis of dyf-6 mutants expressing an OSM-6::GFP reporter indicates that the cilia of the amphid and phasmid dendritic endings are foreshortened. Consistent with genetic mosaic analysis, which indicates that dyf-6 functions in neurons of the amphid sensilla, DYF-6::GFP is expressed in amphid and phasmid neurons. Movement of DYF-6::GFP within the ciliated endings of the neurons indicates that DYF-6 is involved in IFT. In addition, IFT can be observed in dauer larvae.
authors.affiliation: Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, Minnesota 55455, USA. bellx035@umn.edu
authors.forename: Leslie R
authors.initials: LR
authors.lastname: Bell
authors.forename: Steven
authors.initials: S
authors.lastname: Stone
authors.forename: John
authors.initials: J
authors.lastname: Yochem
authors.forename: Jocelyn E
authors.initials: JE
authors.lastname: Shaw
authors.forename: Robert K
authors.initials: RK
authors.lastname: Herman
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D017173:Caenorhabditis elegans / Q000235:genetics* / Q000378:metabolism / Q000648:ultrastructure; D029742:Caenorhabditis elegans Proteins / Q000235:genetics* / Q000378:metabolism; D002352:Carrier Proteins / Q000235:genetics* / Q000378:metabolism; D002923:Cilia / Q000502:physiology; D003001:Cloning, Molecular; D049452:Green Fluorescent Proteins / Q000235:genetics / Q000378:metabolism; D047908:Intracellular Signaling Peptides and Proteins; D008957:Models, Genetic; D008969:Molecular Sequence Data; D009154:Mutation; D009475:Neurons, Afferent / Q000502:physiology / Q000648:ultrastructure; D010641:Phenotype; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
chemical_list: D029742:Caenorhabditis elegans Proteins; D002352:Carrier Proteins; C514940:Daf-10 protein, C elegans; C514939:Dyf-6 protein, C elegans; D047908:Intracellular Signaling Peptides and Proteins; C400274:OSM-1 protein, C elegans; D049452:Green Fluorescent Proteins