title: Cloning, expression and partial characterization of a gene encoding the S15a ribosomal protein of Taenia solium.
abstract: Ribosomes, ribosomal proteins (r-proteins), and messenger and transfer RNAs catalyze the synthesis of proteins in organisms. To understand and define the components involved in this event in Taenia solium, we isolated and characterized a T. solium cDNA encoding the basic ribosomal protein S15a (TsS15a). The TsS15a cDNA produces a protein with M(r) (relative molecular mass) 14,988, which contains 22.3% of basic amino acids. Analysis comparing TsS15a protein with other S15a r-proteins indicates that this protein is highly conserved. A recombinant TsS15a protein with similar M(r) was produced in bacteria. Antibodies against recombinant TsS15a react with a 15-kDa protein in extracts from all life stages of T. solium and from all helminths tested. Hybridization studies showed the presence of two genes encoding a mRNA of 0.5 kb. Moreover, the gene presents an intron of 30 bp. Our phylogenetic analysis using S15a r-proteins reproduced the topologies reported for 16/18S rRNA.
authors.affiliation: Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Edificio A, 2do Piso, Ciudad Universitaria 04510, Mexico City, Mexico.
authors.forename: Lucía
authors.initials: L
authors.lastname: Jiménez
authors.forename: Arturo
authors.initials: A
authors.lastname: Becerra
authors.forename: Abraham
authors.initials: A
authors.lastname: Landa
mesh_terms: D000595:Amino Acid Sequence; D024361:Amino Acids, Basic / Q000737:chemistry; D000818:Animals; D001483:Base Sequence; D015153:Blotting, Western; D003001:Cloning, Molecular; D017124:Conserved Sequence / Q000235:genetics; D018076:DNA, Complementary / Q000737:chemistry / Q000302:isolation & purification; D018509:DNA, Helminth / Q000737:chemistry / Q000302:isolation & purification; D017238:Genes, Helminth; D015801:Helminth Proteins / Q000737:chemistry / Q000235:genetics*; D007438:Introns / Q000235:genetics; D008969:Molecular Sequence Data; D008970:Molecular Weight; D009693:Nucleic Acid Hybridization; D010802:Phylogeny; D012333:RNA, Messenger / Q000235:genetics; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000276:immunology / Q000302:isolation & purification; D012269:Ribosomal Proteins / Q000737:chemistry / Q000235:genetics* / Q000276:immunology; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D041201:Taenia solium / Q000145:classification / Q000235:genetics*
chemical_list: D024361:Amino Acids, Basic; D018076:DNA, Complementary; D018509:DNA, Helminth; D015801:Helminth Proteins; D012333:RNA, Messenger; D011994:Recombinant Proteins; D012269:Ribosomal Proteins; C074488:ribosomal protein S15a