Evolution of serum albumin intron-1 is shaped by a 5 ' truncated non-long terminal repeat retrotransposon in western Palearctic water frogs (Neobatrachia)
Joerg Ploetner, Frank Koehler, Thomas Uzzell, Peter Beerli, Robert Schreiber, Gaston-Denis Guex and Hansjuerg Hotz
Molecular phylogenetics and evolution, v 53(3), pp 784-791
A 5' truncated non-LTR CR1-like retrotransposon, named RanaCR1, was identified in the serum albumin intron-1 (SAI-1) of at least seven species of western Palearctic water frogs (WPWF). Based on sequence similarity of the carboxy-terminal region (CTR) of ORF2 and/or the highly conserved 3' untranslated region (3' UTR), RanaCR1-like elements occur also in the genome of Xenopus tropicalis and Rana temporaria. Unlike other CRI elements, RanaCR1 contains a CA microsatellite in its 3' UTR. The low nucleotide diversity of the 3' UTR compared to the CTR and to SAI-1 suggests that this region still plays a role in WPWF, either as a structure-stabilizing element, or within a species-specific transcriptional network. Length variation of water frog SAI-1 sequences is caused by deletions that extend in some cases beyond the 5' or 3' ends of RanaCR1, probably a result of selection for structural and functional stability of the primary transcript. The impact of RanaCR1 on SAI-1 evolution is also indicated by the significant negative correlation between the length of both SAI-1 and RanaCR1 and the percentage GC content of RanaCR1. Both SAI-1 and RanaCR1 sequences support the sister group relationship of R. perezi and R. saharica, which are placed in the phylogenetic tree at a basal position, the sister clade to other water frog taxa. It also supports the monophyly of the R. lessonae group; of Anatolian water frogs (R. cf. bedriagae), which are not conspecific with R. bedriagae, and of the European ridibunda group. Within the ridibunda clade, Greek frogs are clearly separated, supporting the hypothesis that Balkan water frogs represent a distinct species. Frogs from Atyrau (Kazakhstan), the type locality of 9 ridibunda, were heterozygous for a ridibunda and a cf. bedriagae specific allele. (C) 2009 Elsevier Inc. All rights reserved.
Evolution of serum albumin intron-1 is shaped by a 5 ' truncated non-long terminal repeat retrotransposon in western Palearctic water frogs (Neobatrachia)
Frank Koehler - Humboldt Univ, Museum Nat Kunde, Leibniz Inst Evolut & Biodiversitatsforsch, D-10115 Berlin, Germany
Thomas Uzzell - Drexel University
Peter Beerli - Florida State University
Robert Schreiber - Museum für Naturkunde
Gaston-Denis Guex - University of Zurich
Hansjuerg Hotz - University of Zurich
Publication Details
Molecular phylogenetics and evolution, v 53(3), pp 784-791
Publisher
Elsevier
Number of pages
8
Grant note
R01 GM 078985 / NSF/NIGMS Mathematical Biology program under NIH; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of General Medical Sciences (NIGMS)
R01GM078985 / NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of General Medical Sciences (NIGMS)
PL 213/3-1; 3-2; 3-3 / Deutsche Forschungsgemeinschaft; German Research Foundation (DFG)
31-37579.93; 31-59144.99; 31-103903/1; 31-64004.00 / Swiss National Fund; Swiss National Science Foundation (SNSF)
Resource Type
Journal article
Language
English
Web of Science ID
WOS:000272644800016
Scopus ID
2-s2.0-74949111294
Other Identifier
991019350677004721
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