Characterization, cloning and host-protective activity of a 30-kilodalton glycoprotein secreted by the parasitic stages of Trichostrongylus colubriformis.
The helminth Trichostrongylus colubriformis is a parasitic nematode infecting the small intestine of sheep. We report the isolation and characterization of a 30-kDa glycoprotein capable of partially protecting guinea-pigs against the parasite. This glycoprotein is secreted by the L4 and adult parasitic stages of the worm. The sequence of three separate cDNA clones predicts the polypeptide to be about 15 kDa, with four N-linked carbohydrate chains and an internal disulphide bond. The clones also indicate the existence of sequence variability in this antigen. Limited sequence homology to a porcine intestinal peptide suggests an influence on host gut physiology.
CSIRO Division of Biotechnology, Parkville, Australia.
K W
KW
Savin
T A
TA
Dopheide
M J
MJ
Frenkel
B M
BM
Wagland
W N
WN
Grant
C W
CW
Ward
D000595:Amino Acid Sequence; D000818:Animals; D000947:Antigens, Helminth / Q000235:genetics / Q000276:immunology* / Q000302:isolation & purification; D001483:Base Sequence; D015152:Blotting, Northern; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics; D004220:Disulfides; D004926:Escherichia coli / Q000235:genetics; D006023:Glycoproteins / Q000235:genetics / Q000276:immunology* / Q000302:isolation & purification; D006168:Guinea Pigs; D015801:Helminth Proteins / Q000235:genetics / Q000276:immunology* / Q000302:isolation & purification; D008969:Molecular Sequence Data; D012333:RNA, Messenger / Q000096:biosynthesis; D014252:Trichostrongyloidiasis / Q000276:immunology*; D014253:Trichostrongylosis / Q000276:immunology*; D014254:Trichostrongylus / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D014612:Vaccines / Q000276:immunology
D000947:Antigens, Helminth; D004220:Disulfides; C065667:ESgp30 protein, Trichostrongylus colubriformis; D006023:Glycoproteins; D015801:Helminth Proteins; D012333:RNA, Messenger; D014612:Vaccines; D004247:DNA