Skip Navigation

This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow Supplementary material
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (11)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Costa, J.-L.
Right arrow Articles by Lindblad, P.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Costa, J.-L.
Right arrow Articles by Lindblad, P.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Molecular Biology and Evolution 19:850-857 (2002)
© 2002 Society for Molecular Biology and Evolution

The Cyanobacterial tRNALeu (UAA) Intron: Evolutionary Patterns in a Genetic Marker

José-Luis Costa2,1, Per Paulsrud1 and Peter Lindblad

Department of Physiological Botany, Evolutionary Biology Centre, Uppsala University, Villavägen 6, Sweden

Cyanobacterial tRNALeu (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 be divided into two classes, both built up from two base pairing heptanucleotide repeats. Size variation was primarily caused by different numbers of repeats, but some strains also contained additional sequences in this stem-loop not following the heptanucleotide repeat motif. Several sequences showing similarity with these additional sequences were identified in the Nostoc punctiforme genome. Furthermore, the regions flanking these sequences contained the same, or similar, heptanucleotide repeats as those flanking the corresponding sequences in the intron. It is proposed that both slipped strand mispairing during replication and homologous recombination among different loci in the genome are important processes causing variation between introns.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Genome ResHome page
J. Elhai, M. Kato, S. Cousins, P. Lindblad, and J. L. Costa
Very small mobile repeated elements in cyanobacterial genomes
Genome Res., September 1, 2008; 18(9): 1484 - 1499.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
J. Rikkinen and V. Virtanen
Genetic diversity in cyanobacterial symbionts of thalloid bryophytes
J. Exp. Bot., March 5, 2008; (2008) ern003v1.
[Abstract] [Full Text] [PDF]

Home page
 Appl. Environ. Microbiol.Home page
E. Leitao, F. Oxelfelt, P. Oliveira, P. Moradas-Ferreira, and P. Tamagnini
Analysis of the hupSL Operon of the Nonheterocystous Cyanobacterium Lyngbya majuscula CCAP 1446/4: Regulation of Transcription and Expression under a Light-Dark Regimen
Appl. Envir. Microbiol., August 1, 2005; 71(8): 4567 - 4576.
[Abstract] [Full Text] [PDF]

Home page
 Mol Biol EvolHome page
M. A. Koch, C. Dobes, M. Matschinger, W. Bleeker, J. Vogel, M. Kiefer, and T. Mitchell-Olds
Evolution of the trnF(GAA) Gene in Arabidopsis Relatives and the Brassicaceae Family: Monophyletic Origin and Subsequent Diversification of a Plastidic Pseudogene
Mol. Biol. Evol., April 1, 2005; 22(4): 1032 - 1043.
[Abstract] [Full Text] [PDF]

Home page
 Int. J. Syst. Evol. Microbiol.Home page
I. Oksanen, K. Lohtander, K. Sivonen, and J. Rikkinen
Repeat-type distribution in trnL intron does not correspond with species phylogeny: comparison of the genetic markers 16S rRNA and trnL intron in heterocystous cyanobacteria
Int J Syst Evol Microbiol, May 1, 2004; 54(3): 765 - 772.
[Abstract] [Full Text] [PDF]


Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.