Release of glycoprotein (GP1) from the tegumental surface of Taenia solium by phospholipase C from Clostridium perfringens suggests a novel protein-anchor to membranes.
In order to explore how molecules are linked to the membrane surface in larval Taenia solium, whole cysticerci were incubated in the presence of phospholipase C from Clostridium perfringens (PLC). Released material was collected and analyzed in polyacrylamide gels with sodium dodecyl sulfate. Two major bands with apparent molecular weights of 180 and 43 kDa were observed. Western blot of released material and localization assays in cysticerci tissue sections using antibodies against five known surface glycoproteins of T. solium cysticerci indicated that only one, previously called GP1, was released. Similar localization studies using the lectins wheat-germ-agglutinin and Concanavalin A showed that N-acetyl-D-glucosamine, N-acetylneuraminic, sialic acid, alphamethyl-D-mannoside, D-manose/glucose, and N-acetyl-D-glucosamine residues are abundantly present on the surface. On the other hand, we find that treatment with PLC releases molecules from the surface; they do not reveal Cross Reacting Determinant (CRD), suggesting a novel anchor to the membrane for the glycoprotein GP1.
Departamento de Microbiología y Parasitología, Facultad de Medicina, UNAM, México 04510, DF, Mexico. landap@servidor.unam.mx
Abraham
A
Landa
Kaethe
K
Willms
Juan Pedro
JP
Laclette
D000818:Animals; D015153:Blotting, Western; D003016:Clostridium perfringens / Q000201:enzymology*; D003552:Cysticercus / Q000166:cytology / Q000378:metabolism* / Q000648:ultrastructure; D004591:Electrophoresis, Polyacrylamide Gel; D006651:Histocytochemistry; D008562:Membrane Glycoproteins / Q000737:chemistry / Q000378:metabolism*; D008854:Microscopy, Electron; D018482:Muscle, Skeletal / Q000469:parasitology; D013552:Swine; D041201:Taenia solium / Q000378:metabolism*; D010738:Type C Phospholipases / Q000378:metabolism*
D008562:Membrane Glycoproteins; D010738:Type C Phospholipases