title: Cloning and characterization of Rab and Ran/TC4 cDNA clones in Trichinella spp.
abstract: The cloning and characterization of seven Rab and three Ran/TC4 partial cDNA sequences in both cystic (Trichinella spiralis and T. britovi) and noncystic species (T. pseudospiralis) are reported. These molecules were cloned by rapid amplification of cDNA ends via polymerase chain reaction (RACE-PCR), using cDNA from the aforementioned Trichinella spp. coupled to the AP1 adaptor. As primers, AP1 and 5B (derived from the WDTAGQE sequence of region 2 specific for Rab and Ran proteins) sequences were included in the PCR. The cloned cDNAs were sequenced and characterized by both Southern-blot and Northern-blot analysis. Trichinella spp. Rab- and Ran-like molecules showed divergences in both the nucleotide and the deduced amino acid sequences as compared with the corresponding homologues previously described in other organisms. In addition, differences were observed among the Trichinella species, mainly between the cystic and the noncystic species, in both DNA restriction-enzyme polymorphism and expression of the six GTPases isolated.
authors.affiliation: Ministerio de Sanidad y Consumo, Instituto de Salud Carlos III, Centro Nacional de Microbiología, Majadahonda, Madrid, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Rodríguez
authors.forename: P
authors.initials: P
authors.lastname: Bonay
authors.forename: M
authors.initials: M
authors.lastname: Fresno
authors.forename: T
authors.initials: T
authors.lastname: Gárate
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D015152:Blotting, Northern; D015139:Blotting, Southern; D003001:Cloning, Molecular; D018076:DNA, Complementary; D018509:DNA, Helminth / Q000235:genetics; D019204:GTP-Binding Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D006801:Humans; D008969:Molecular Sequence Data; D009687:Nuclear Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D016133:Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D014234:Trichinella / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D020931:ran GTP-Binding Protein
chemical_list: D018076:DNA, Complementary; D018509:DNA, Helminth; D009687:Nuclear Proteins; D019204:GTP-Binding Proteins; D020931:ran GTP-Binding Protein