Presence of multiple group I introns closely related to bacteria and fungi in plastid 23S rRNAs of lichen-forming Trebouxia
Int. microbiol
; 12(1): 59-67, mar. 2009. tab, graf
Artigo
em Inglês
| IBECS
| ID: ibc-72365
Biblioteca responsável:
ES1.1
Localização: BNCS
ABSTRACT
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 (AU)
RESUMEN
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Coleções:
Bases de dados nacionais
/
Espanha
Contexto em Saúde:
Doenças Negligenciadas
Problema de saúde:
Doenças Negligenciadas
/
Zoonoses
Base de dados:
IBECS
Assunto principal:
RNA Ribossômico 23S
/
Íntrons
/
DNA de Cloroplastos
/
Escherichia coli
Idioma:
Inglês
Revista:
Int. microbiol
Ano de publicação:
2009
Tipo de documento:
Artigo
Instituição/País de afiliação:
University of Alcalá/Spain
/
University of Valencia/Spain