The Tc3 Family of Transposable Genetic Elements in Caenorhabditis Elegans
AUTOR(ES)
Collins, J.
RESUMO
We describe genetic and molecular properties of Tc3, a family of transposable elements in Caenorhabditis elegans. About 15 Tc3 elements are present in the genomes of several different wild-type varieties of C. elegans, but Tc3 transposition and excision are not detected in these strains. Tc3 transposition and excision occur at high frequencies, however, in strain TR679, a mutant identified because of its highly active Tc1 elements. In TR679, Tc3 is responsible for several spontaneous mutations affecting the unc-22 gene. Tc3-induced mutations are unstable, and revertants result from precise or nearly precise excision of Tc3. Although Tc3 is very active in TR679, it is not detectably active in several other mutator mutants, all of which exhibit high levels of Tc1 activity. Tc3 is 2.5 kilobases long, and except for sequences near its inverted repeat termini, it is unrelated to Tc1. The termini of Tc3 are inverted repeats of at least 70 base pairs; the terminal 8 nucleotides of Tc3 are identical to 8 of the terminal 9 nucleotides of Tc1.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1203604Documentos Relacionados
- Target site choice of the related transposable elements Tc1 and Tc3 of Caenorhabditis elegans.
- The Tc5 Family of Transposable Elements in Caenorhabditis Elegans
- DNA binding activities of the Caenorhabditis elegans Tc3 transposase.
- Mobilization of quiet, endogenous Tc3 transposons of Caenorhabditis elegans by forced expression of Tc3 transposase.
- Insertion and excision of Caenorhabditis elegans transposable element Tc1.