title: Characterization of Schistosoma mansoni ATPDase2 gene, a novel apyrase family member.
abstract: Schistosoma mansoni is a major causative agent of schistosomiasis, which constitutes a severe health problem in developing countries. We have previously described the SmATPDase1 gene, encoding a protein from the external surface of the parasites. In this work, we describe the cloning and characterization of SmATPDase2, a novel CD39-like ATP diphosphohydrolase gene in S. mansoni. In silico analysis of the protein encoded by SmATPDase2 predicts a single N-terminal transmembrane domain similar to that described for secreted human apyrase isoforms. Immuno-colocalization experiments detected both SmATPDase proteins at the S. mansoni adult worm tegument basal and apical membranes, but only SmATPDase2 in the tegument syncytium. SmATPDase2 but not SmATPDase1 protein was detected by Western blot in culture medium supernatants following incubation of adult worms in vitro, indicating that SmATPDase2 was secreted by the parasite to the medium. Taken together these data suggest a non-redundant role for SmATPDase2 in the parasite-host interplay.
authors.affiliation: Departamento de Bioquímica, Instituto de Química,Universidade de São Paulo, 05508-900 São Paulo, SP, Brazil.
authors.forename: Julio
authors.initials: J
authors.lastname: Levano-Garcia
authors.forename: Renato A
authors.initials: RA
authors.lastname: Mortara
authors.forename: Sergio
authors.initials: S
authors.lastname: Verjovski-Almeida
authors.forename: Ricardo
authors.initials: R
authors.lastname: DeMarco
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001081:Apyrase / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D004789:Enzyme Activation; D008969:Molecular Sequence Data; D009928:Organ Specificity; D012550:Schistosoma mansoni / Q000201:enzymology*; D014018:Tissue Distribution
chemical_list: D001081:Apyrase