ArticleNucleic acids research1994
Nucleolar introns from Physarum flavicomum contain insertion elements that may explain how mobile group I introns gained their open reading frames.
Article in Nucleic acids research, 1994. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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9 citing papers in PubMed, 32 citations in OpenAlex.
- Article
- A Phylogenetic Approach to Structural Variation in Organization of Nuclear Group I Introns and Their Ribozymes.Non-coding RNA · 2021Article
- Nuclear group I introns in self-splicing and beyond.Mobile DNA · 2013Article
- Polyphyletic origin of the genus Physarum (Physarales, Myxomycetes) revealed by nuclear rDNA mini-chromosome analysis and group I intron synapomorphy.BMC evolutionary biology · 2012Article
- Group I introns and associated homing endonuclease genes reveals a clinal structure for Porphyra spiralis var. amplifolia (Bangiales, Rhodophyta) along the Eastern coast of South America.BMC evolutionary biology · 2008Article
- Multiple origins of fungal group I introns located in the same position of nuclear SSU rRNA gene.Journal of molecular evolution · 1998Article
- Three different group I introns in the nuclear large subunit ribosomal DNA of the amoeboflagellate Naegleria.Nucleic acids research · 1998Article
- Primary and secondary structure analyses of the rDNA group-I introns of the Zygnematales (Charophyta).Current genetics · 1996Article
- Two group I ribozymes with different functions in a nuclear rDNA intron.The EMBO journal · 1995Article
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5 authors at 1 institution in 1 country.
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Abstract
Comparison of two group I intron sequences in the nucleolar genome of the myxomycete Physarum flavicomum to their homologs in the closely related Physarum polycephalum revealed insertion-like elements. One of the insertion-like elements consists of two repetitive sequence motifs of 11 and 101 bp in five and three copies, respectively. The smaller motif, which flanks the larger, resembles a target duplication and indicates a relationship to transposons or retroelements. The insertion-like elements are found in the peripheral loops of the RNA structure; the positions occupied by the ORFs of mobile nucleolar group I introns. The P. flavicomum introns are 1184 and 637 bp in size, located in the large subunit ribosomal RNA gene, and can be folded into group I intron structures at the RNA level. However, the intron 2s from both P. flavicomum and P. polycephalum contain an unusual core region that lacks the P8 segment. None of the introns are able to self-splice in vitro. Southern analysis of different isolates indicates that the introns are not optional in myxomycetes.
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