Tehao functions in the Toll pathway in Drosophila melanogaster: possible roles in development and innate immunity.
Toll and related proteins play important roles in innate immunity in both invertebrates and vertebrates. In Drosophila melanogaster, Tehao shares a striking similarity in its intracellular domain with Toll. In this paper, we show that Tehao is expressed throughout development and appears to be glycosylated. In transiently transfected cells, Tehao activated both Dorsal and the transcription of endogenous drosomycin and metchnikowin genes. Purified recombinant Tehao interacted specifically in vitro not only with the Pelle protein kinase, but also with the Toll intracytoplasmic domain. Remarkably, Tehao was found to activate Dorsal-dependent transcription in a synergistic manner with Toll, as well as Pelle in co-transfected cells. Thus, Tehao, alone or with Toll as a multimeric complex, has the potential to participate in both the development and innate immune responses of Drosophila.
Luo
C
C
Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven, CT 06520, USA.
Shen
B
B
Manley
J L
JL
Zheng
L
L
D000595:Amino Acid Sequence; D000818:Animals; D015153:Blotting, Western; D002460:Cell Line; D017931:DNA Primers; D029721:Drosophila Proteins / Q000235:genetics* / Q000276:immunology; D004331:Drosophila melanogaster / Q000235:genetics* / Q000276:immunology*; D018507:Gene Expression Regulation, Developmental; D006031:Glycosylation; D019476:Insect Proteins / Q000235:genetics* / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000235:genetics*; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000737:chemistry; D011956:Receptors, Cell Surface / Q000235:genetics* / Q000276:immunology; D011994:Recombinant Proteins / Q000378:metabolism; D015398:Signal Transduction; D051198:Toll-Like Receptor 5; D051193:Toll-Like Receptors; D014158:Transcription, Genetic; D014162:Transfection
D017931:DNA Primers; D029721:Drosophila Proteins; D019476:Insect Proteins; D008562:Membrane Glycoproteins; D010446:Peptide Fragments; D011956:Receptors, Cell Surface; D011994:Recombinant Proteins; C068721:Tl protein, Drosophila; D051198:Toll-Like Receptor 5; D051193:Toll-Like Receptors; C495341:tehao protein, Drosophila; C091227:DRS protein, Drosophila