Tenectin is a novel alphaPS2betaPS integrin ligand required for wing morphogenesis and male genital looping in Drosophila.
Morphogenesis of the adult structures of holometabolous insects is regulated by ecdysteroids and juvenile hormones and involves cell-cell interactions mediated in part by the cell surface integrin receptors and their extracellular matrix (ECM) ligands. These adhesion molecules and their regulation by hormones are not well characterized. We describe the gene structure of a newly described ECM molecule, tenectin, and demonstrate that it is a hormonally regulated ECM protein required for proper morphogenesis of the adult wing and male genitalia. Tenectin's function as a new ligand of the PS2 integrins is demonstrated by both genetic interactions in the fly and by cell spreading and cell adhesion assays in cultured cells. Its interaction with the PS2 integrins is dependent on RGD and RGD-like motifs. Tenectin's function in looping morphogenesis in the development of the male genitalia led to experiments that demonstrate a role for PS integrins in the execution of left-right asymmetry.
Centre des Sciences du Goût et de l'Alimentation, UMR-6265 CNRS, INRA, Université de Bourgogne, Agrosup Dijon, F-21000 Dijon, France.
Stéphane
S
Fraichard
Anne-Laure
AL
Bougé
Timmy
T
Kendall
Isabelle
I
Chauvel
Hervé
H
Bouhin
Thomas A
TA
Bunch
D000818:Animals; D004330:Drosophila / Q000235:genetics / Q000254:growth & development / Q000502:physiology*; D029721:Drosophila Proteins / Q000235:genetics / Q000378:metabolism*; D016326:Extracellular Matrix Proteins / Q000235:genetics / Q000378:metabolism*; D005837:Genitalia, Male / Q000502:physiology*; D007150:Immunohistochemistry; D017403:In Situ Hybridization; D039001:Integrin alpha Chains / Q000235:genetics / Q000378:metabolism; D007814:Larva / Q000235:genetics / Q000378:metabolism; D008024:Ligands; D008297:Male; D009024:Morphogenesis / Q000235:genetics; D009154:Mutation; D019076:Transgenes; D014921:Wings, Animal / Q000254:growth & development / Q000378:metabolism / Q000502:physiology*
D029721:Drosophila Proteins; D016326:Extracellular Matrix Proteins; D039001:Integrin alpha Chains; D008024:Ligands; C515512:Tnc protein, Drosophila; C082188:if protein, Drosophila