title: SRC64 regulates the localization of a Tec-family kinase required for Drosophila ring canal growth.
abstract: Mutation of the Src64 gene of Drosophila results in ovarian ring canal defects and reduced female fertility. We used a dosage-sensitive modifier screen to search for downstream components of the SRC64 signaling pathway. We show that mutations affecting Tec29, an essential gene encoding a member of the Tec family of protein tyrosine kinases, dominantly enhance the Src64 ring canal phenotype. Loss of Tec29 function in the female germline results in a phenotype strikingly similar to that caused by the loss of Src64 function. In each case, the ring canals are reduced in size and phosphotyrosine content. We further demonstrate that TEC29 localizes to the ring canal, and this subcellular localization requires Src64 function. These data suggest that TEC29 is a downstream target of SRC64, and that regulating TEC29 localization during ring canal growth may be a crucial SRC64 function.
authors.affiliation: Department of Biological Sciences, Stanford University, California 94305, USA.
authors.forename: D J
authors.initials: DJ
authors.lastname: Guarnieri
authors.forename: G S
authors.initials: GS
authors.lastname: Dodson
authors.forename: M A
authors.initials: MA
authors.lastname: Simon
mesh_terms: D000825:Animal Structures / Q000254:growth & development; D000818:Animals; D004330:Drosophila / Q000201:enzymology / Q000254:growth & development*; D029721:Drosophila Proteins; D005260:Female; D005298:Fertility / Q000235:genetics; D018095:Germ-Line Mutation / Q000502:physiology; D019476:Insect Proteins / Q000502:physiology; D008969:Molecular Sequence Data; D010641:Phenotype; D011505:Protein-Tyrosine Kinases / Q000378:metabolism*; D011518:Proto-Oncogene Proteins / Q000235:genetics* / Q000378:metabolism*; D015398:Signal Transduction / Q000502:physiology
chemical_list: D029721:Drosophila Proteins; D019476:Insect Proteins; D011518:Proto-Oncogene Proteins; C089848:Tec protein-tyrosine kinase; D011505:Protein-Tyrosine Kinases; C075699:Src64B protein, Drosophila