title: Component proteins and protease activities in excretory-secretory product of sparganum.
abstract: Spirometra mansoni plerocercoid (sparganum) was incubated in saline at 4 degrees C or 37 degrees C up to 100 hours. Protein contents in the excretory-secretory product (ESP) were rather constant (mean 7.7 mg of protein/gram of sparganum) in the preparations. Reducing SDS-PAGE of ESP showed similar protein subunit compositions with those in crude extract. Antigenic 36 and 31 kDa proteins were major bands in ESP. ESP exhibited specific activities of protease (2.9-5.3 units/mg) at pH 6.0 and pH 7.5. Presence of protease activity in ESP may be a supporting evidence that hitherto known cysteine protease of sparganum is possibly secreted.
authors.affiliation: Department of Parasitology, College of Medicine, Chung-Ang University, Seoul, Korea.
authors.forename: S Y
authors.initials: SY
authors.lastname: Cho
authors.forename: Y B
authors.initials: YB
authors.lastname: Chung
authors.forename: Y
authors.initials: Y
authors.lastname: Kong
mesh_terms: D000818:Animals; D003546:Cysteine Endopeptidases / Q000032:analysis*; D004591:Electrophoresis, Polyacrylamide Gel; D015801:Helminth Proteins / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D013032:Sparganum / Q000737:chemistry* / Q000201:enzymology
chemical_list: D015801:Helminth Proteins; D003546:Cysteine Endopeptidases