The Cyanobacterial tRNALeu (UAA) Intron: Evolutionary Patterns in a Genetic Marker
نویسندگان
چکیده
منابع مشابه
The cyanobacterial tRNA(Leu) (UAA) intron: evolutionary patterns in a genetic marker.
Cyanobacterial tRNA(Leu) (UAA) intron sequences from natural populations of Nostoc and other cyanobacteria were compared. Variation between the different introns was not randomly distributed but strongly restricted by the secondary and tertiary structure of the intron. Although all Nostoc sequences examined shared high similarity, differences were observed in one stem-loop. This stem-loop could...
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The group I intron interrupting the tRNALeu UAA gene (trnL) is present in most cyanobacterial genomes as well as in the plastids of many eukaryotic algae and all green plants. In lichen symbiotic Nostoc, the P6b stem-loop of trnL intron always involves one of two different repeat motifs, either Class I or Class II, both with unresolved evolutionary histories. Here we attempt to resolve the comp...
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Introns are located either between codons (phase 0) or within codons (phase 1 and 2) and their phases as well as location usually stay unchanged for a long time. A string of intron phases represents a structure which may carry useful additional information about internal rearrangements of a gene. Combined search for intron phase patterns and exon lengths serves as a helpful approach for finding...
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ژورنال
عنوان ژورنال: Molecular Biology and Evolution
سال: 2002
ISSN: 1537-1719,0737-4038
DOI: 10.1093/oxfordjournals.molbev.a004142