title: [Domain organization of the ORF2 C-terminal region of the German cockroach retroposon R1].
abstract: Using cosmid vector, a gene library of German cockroach Blattella germanica was constructed. From this library, clones containing full-length copies of two subfamilies of R1 retroposons were selected. Retroposons R1 of German cockroach belonging to different subfamilies were shown to be different in domain organization of the ORF2 C-terminal region. For the first time, retroposons transmembrane domains were identified in the sequences of R1. It was demonstrated that two retroposon R1 subfamilies of German cockroach arose as a result of intragenomic divergence rather than via horizontal transfer of alien mobile element into cockroach genome. The differences in domain organization appeared not as a result of saltatory recombination processes, but as a consequence of gradual mutation accumulation, which led to either degeneration, or to domain formation.
authors.forename: A S
authors.initials: AS
authors.lastname: Kagramanova
authors.forename: T V
authors.initials: TV
authors.lastname: Kapelinskaia
authors.forename: A L
authors.initials: AL
authors.lastname: Korolev
authors.forename: D V
authors.initials: DV
authors.lastname: Mukha
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001425:Bacterial Outer Membrane Proteins / Q000737:chemistry / Q000235:genetics; D001483:Base Sequence; D003058:Cockroaches / Q000235:genetics*; D049750:Genome, Insect; D026901:Membrane Transport Proteins / Q000737:chemistry / Q000235:genetics; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D017434:Protein Structure, Tertiary; D011550:Pseudomonas aeruginosa / Q000235:genetics; D018626:Retroelements
chemical_list: D001425:Bacterial Outer Membrane Proteins; D026901:Membrane Transport Proteins; C402263:OprM protein, Pseudomonas aeruginosa; D018626:Retroelements