Ty1-copia group retrotransposon sequences in amphibia and reptilia
| Autor: | Andrew J. Flavell, Scott Waddell, Ian Riach, Vicky Jackson, Mohammed P. Iqbal |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Pyxicephalus
Retroelements Molecular Sequence Data Retrotransposon Genome Polymerase Chain Reaction Amphibians Marine iguana biology.animal Genetics Animals Amino Acid Sequence Molecular Biology Conolophus Conserved Sequence Phylogeny Repetitive Sequences Nucleic Acid Iguana biology Phylogenetic tree Vertebrate Reptiles Sequence Analysis DNA biology.organism_classification Blotting Southern Retroviridae Evolutionary biology Vertebrates Sequence Alignment |
| Zdroj: | Moleculargeneral genetics : MGG. 246(1) |
| ISSN: | 0026-8925 |
| Popis: | We have isolated sequences belonging to Ty1-copia group retrotransposons from the genomes of an amphibian (Pyxicephalus adspersa) and three reptiles (Conolophus subscristatus, Amblyrynchus cristatus and Pytas mucosus). Two different sequences were found in the amphibian (Tpa1 and Tpa2). Each is present in several copies per genome and absent from the genomes of two other amphibian species. The C. subcristatus sequence Tcs1 is present in multiple copies in both its host genome (Galapagos land iguana) and the genome of the related Galapagos marine iguana (A. cristatus). There is little or no polymorphism in Tcs1 insertions between different individual animals, suggesting that this sequence is not transposing rapidly in either iguana genome. The P. mucosus sequence Tpm1 shows a discontinuous distribution in snake species, suggesting that it has either been lost from many lineages during vertical germline transmission or has been transferred horizontally in some snake species. Phylogenetic comparisons of all these sequences with each other and with other members of this retrotransposon group from other animals and plants show that sequences within a particular vertebrate species are most closely related to each other, consistent with a vertical transmission model for their evolution. |
| Databáze: | OpenAIRE |
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