title: Characterization of the complete protein disulfide isomerase gene of Schistosoma mansoni and identification of the tissues of its expression.
abstract: cDNA and genomic clones of Schistosoma mansoni containing the complete sequence of a homolog of protein disulfide isomerase have been identified. The protein disulfide isomerase gene in schistosomes is a single copy gene having a genomic structure that is very similar to that of man. The C-terminus of the deduced protein is KDEL which in mammals functions as a signal sequence for retention of luminal proteins in the endoplasmic reticulum. Immunohistology and in situ hybridization identify the gastrodermis of the gut, the wall cells of the protonephridia, and the sustentacular cells of the testes to be the major tissues of protein disulfide isomerase gene expression. The protein disulfide isomerase of schistosomes, produced in an expression vector in Escherichia coli, catalyzes disulfide/sulfhydryl isomerization in vitro.
authors.affiliation: Institut für Genetik und Biologisch-Medizinisches Forschungszentrum, Heinrich-Heine-Universität, Düsseldorf, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Finken
authors.forename: A
authors.initials: A
authors.lastname: Sobek
authors.forename: P
authors.initials: P
authors.lastname: Symmons
authors.forename: W
authors.initials: W
authors.lastname: Kunz
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002417:Cattle; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D004064:Digestive System / Q000378:metabolism; D005260:Female; D015971:Gene Expression Regulation, Enzymologic; D017238:Genes, Helminth; D015801:Helminth Proteins / Q000096:biosynthesis / Q000235:genetics*; D006801:Humans; D007535:Isomerases / Q000096:biosynthesis / Q000235:genetics*; D007668:Kidney / Q000378:metabolism; D008297:Male; D008969:Molecular Sequence Data; D009928:Organ Specificity; D019704:Protein Disulfide-Isomerases; D012550:Schistosoma mansoni / Q000201:enzymology / Q000235:genetics*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D013045:Species Specificity; D013737:Testis / Q000378:metabolism
chemical_list: D018076:DNA, Complementary; D015801:Helminth Proteins; D007535:Isomerases; D019704:Protein Disulfide-Isomerases