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Presence of multiple group I introns closely related to bacteria and fungi in plastid 23S rRNAs of lichen-forming "Trebouxia"

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http://dialnet.unirioja.es/servlet/oaiart?codigo=2969182

(Revista) ISSN 1139-6709

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Title:: Presence of multiple group I introns closely related to bacteria and fungi in plastid 23S rRNAs of lichen-forming "Trebouxia"
Tema:: Trebouxia ssp; group I introns; plastid 23S rRNA; lichens; horizontal transfer
Description:: The chloroplast-encoded large subunit ribosomal RNA gene of several free-living green algae contains group I introns at Escherichia coli genic positions 1917, 1931, 1951, and 2449. Herein we report the presence of group I introns at these positions within the chloroplast-encoded large subunit ribosomal RNA gene of several lichen-forming green algae belonging to the Trebouxia genus. In contrast to the introns inserted at position 2449, all introns inserted at positions 1917, 1931, and 1951 contained LAGLIDADG homing endonuclease genes. Phylogenetic analyses show that: (i) introns inserted at positions 1917, 1931, and 1951 are closely related to introns located at homologous insertion sites in bacterial rDNA genes; and (ii) introns inserted at position 2449 are closely related to fungal introns located at homologous insertion sites in mitochondrial rDNA genes. The symbiogenetic thalli of some lichens are proposed as the likely setting of horizontal transfer of genetic material among distantly related organisms such as bacteria, fungi, and green algae. [Int Microbiol 2009; 12(1):59-67]
Source:: International microbiology: official journal of the Spanish Society for Microbiology, ISSN 1139-6709, Vol. 12, Nº. 1, 2009, pags. 59-68
Idioma:: English
Autor/Productor:: Barreno Rodríguez, Eva; Campo, Eva M. del; Casano, Leonardo M.; Gasulla, Francisco
Publisher:: Sociedad Española de Microbiología; Viguera Editores
Rights:: free
Date:: 2009
Tipo de recurso:: text (article)

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1. <dc:title>Presence of multiple group I introns closely related to bacteria and fungi in plastid 23S rRNAs of lichen-forming "Trebouxia"</dc:title>
2. <dc:creator>Barreno Rodríguez, Eva</dc:creator>
3. <dc:creator>Campo, Eva M. del</dc:creator>
4. <dc:creator>Casano, Leonardo M.</dc:creator>
5. <dc:creator>Gasulla, Francisco</dc:creator>
6. <dc:subject>Trebouxia ssp</dc:subject>
7. <dc:subject>group I introns</dc:subject>
8. <dc:subject>plastid 23S rRNA</dc:subject>
9. <dc:subject>lichens</dc:subject>
10. <dc:subject>horizontal transfer</dc:subject>
11. <dc:description>The chloroplast-encoded large subunit ribosomal RNA gene of several free-living green algae contains group I introns at Escherichia coli genic positions 1917, 1931, 1951, and 2449. Herein we report the presence of group I introns at these positions within the chloroplast-encoded large subunit ribosomal RNA gene of several lichen-forming green algae belonging to the Trebouxia genus. In contrast to the introns inserted at position 2449, all introns inserted at positions 1917, 1931, and 1951 contained LAGLIDADG homing endonuclease genes. Phylogenetic analyses show that: (i) introns inserted at positions 1917, 1931, and 1951 are closely related to introns located at homologous insertion sites in bacterial rDNA genes; and (ii) introns inserted at position 2449 are closely related to fungal introns located at homologous insertion sites in mitochondrial rDNA genes. The symbiogenetic thalli of some lichens are proposed as the likely setting of horizontal transfer of genetic material among distantly related organisms such as bacteria, fungi, and green algae. [Int Microbiol 2009; 12(1):59-67]</dc:description>
12. <dc:publisher>Sociedad Española de Microbiología</dc:publisher>
13. <dc:publisher>Viguera Editores</dc:publisher>
14. <dc:date>2009</dc:date>
15. <dc:type>text (article)</dc:type>
16. <dc:identifier>http://dialnet.unirioja.es/servlet/oaiart?codigo=2969182</dc:identifier>
17. <dc:identifier>(Revista) ISSN 1139-6709</dc:identifier>
18. <dc:source>International microbiology: official journal of the Spanish Society for Microbiology, ISSN 1139-6709, Vol. 12, Nº. 1, 2009, pags. 59-68</dc:source>
19. <dc:language>eng</dc:language>
20. <dc:rights>free</dc:rights>
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