scholarly journals Phylogeny of Vibrio cholerae Based onrecA Sequence

2000 ◽  
Vol 68 (12) ◽  
pp. 7180-7185 ◽  
Author(s):  
O. Colin Stine ◽  
Shanmuga Sozhamannan ◽  
Qing Gou ◽  
Siqen Zheng ◽  
J. Glenn Morris ◽  
...  
Keyword(s):  
Vibrio Cholerae ◽  
Related Species ◽  
Horizontal Transfer ◽  
Vibrio Parahaemolyticus ◽  
Vibrio Vulnificus ◽  
Sequence Divergence ◽  
Closely Related Species ◽  
O Antigen

ABSTRACT We sequenced a 705-bp fragment of the recA gene from 113 Vibrio cholerae strains and closely related species. One hundred eighty-seven nucleotides were phylogenetically informative, 55 were phylogenetically uninformative, and 463 were invariant. Not unexpectedly, Vibrio parahaemolyticus and Vibrio vulnificus strains formed out-groups; we also identified isolates which resembled V. cholerae biochemically but which did not cluster with V. cholerae. In many instances, V. cholerae serogroup designations did not correlate with phylogeny, as reflected by recA sequence divergence. This observation is consistent with the idea that there is horizontal transfer of O-antigen biosynthesis genes among V. cholerae strains.

Evolution of primate orphan proteins

2009 ◽  
Vol 37 (4) ◽  
pp. 778-782 ◽  
Author(s):  
Macarena Toll-Riera ◽  
Robert Castelo ◽  
Nicolás Bellora ◽  
M. Mar Albà
Keyword(s):  
Related Species ◽  
Sequence Divergence ◽  
Orphan Genes ◽  
Closely Related Species ◽  
Protein Coding ◽  
Rapid Sequence ◽  
Adaptive Processes ◽  
Mechanisms Of Formation ◽  
Novel Protein

Genomes contain a large number of genes that do not have recognizable homologues in other species. These genes, found in only one or a few closely related species, are known as orphan genes. Their limited distribution implies that many of them are probably involved in lineage-specific adaptive processes. One important question that has remained elusive to date is how orphan genes originate. It has been proposed that they might have arisen by gene duplication followed by a period of very rapid sequence divergence, which would have erased any traces of similarity to other evolutionarily related genes. However, this explanation does not seem plausible for genes lacking homologues in very closely related species. In the present article, we review recent efforts to identify the mechanisms of formation of primate orphan genes. These studies reveal an unexpected important role of transposable elements in the formation of novel protein-coding genes in the genomes of primates.

scholarly journals Transposable Elements and the Evolution of Insects

2021 ◽  
Vol 66 (1) ◽  
pp. 355-372
Author(s):  
Clément Gilbert ◽  
Jean Peccoud ◽  
Richard Cordaux
Keyword(s):  
Transposable Elements ◽  
Related Species ◽  
Horizontal Transfer ◽  
Population Genomics ◽  
Antiviral Immunity ◽  
Closely Related Species ◽  
Phylogenetic Relatedness ◽  
Functional Studies ◽  
Insect Symbionts

Insects are major contributors to our understanding of the interaction between transposable elements (TEs) and their hosts, owing to seminal discoveries, as well as to the growing number of sequenced insect genomes and population genomics and functional studies. Insect TE landscapes are highly variable both within and across insect orders, although phylogenetic relatedness appears to correlate with similarity in insect TE content. This correlation is unlikely to be solely due to inheritance of TEs from shared ancestors and may partly reflect preferential horizontal transfer of TEs between closely related species. The influence of insect traits on TE landscapes, however, remains unclear. Recent findings indicate that, in addition to being involved in insect adaptations and aging, TEs are seemingly at the cornerstone of insect antiviral immunity. Thus, TEs are emerging as essential insect symbionts that may have deleterious or beneficial consequences on their hosts, depending on context.

scholarly journals Light-scattering sensor for real-time identification of Vibrio parahaemolyticus , Vibrio vulnificus and Vibrio cholerae colonies on solid agar plate

2012 ◽  
Vol 5 (5) ◽  
pp. 607-620 ◽  
Author(s):  
Karleigh Huff ◽  
Amornrat Aroonnual ◽  
Amy E. Fleishman Littlejohn ◽  
Bartek Rajwa ◽  
Euiwon Bae ◽  
...  
Keyword(s):  
Light Scattering ◽  
Vibrio Cholerae ◽  
Real Time ◽  
Vibrio Parahaemolyticus ◽  
Vibrio Vulnificus ◽  
Agar Plate ◽  
Solid Agar ◽  
Real Time Identification

scholarly journals Wickerhamiella allomyrinae f.a., sp. nov., a yeast species isolated from the gut of the rhinoceros beetle Allomyrina dichotoma

2014 ◽  
Vol 64 (Pt_11) ◽  
pp. 3856-3861 ◽  
Author(s):  
Yong-Cheng Ren ◽  
Yun Wang ◽  
Liang Chen ◽  
Tao Ke ◽  
Feng-Li Hui
Keyword(s):  
Related Species ◽  
Nature Reserve ◽  
Yeast Species ◽  
Novel Species ◽  
Sequence Divergence ◽  
Rrna Gene ◽  
The Novel ◽  
Closely Related Species ◽  
Rhinoceros Beetle ◽  
Lsu Rrna Gene

Two strains representing Wickerhamiella allomyrinae f.a., sp. nov. were isolated from the gut of Allomyrina dichotoma (Coleoptera: Scarabeidae) collected from the Baotianman National Nature Reserve, Nanyan, Henan Province, China. Sequence analyses of the D1/D2 domains of the LSU rRNA gene revealed that this novel species was located in the Wickerhamiella clade (Saccharomycetes, Saccharomycetales), with three described species of the genus Candida, namely Candida musiphila, Candida spandovensis and Candida sergipensis, as the most closely related species. The novel species differed from these three species by 9.3–9.8 % sequence divergence (35–45 nt substitutions) in the D1/D2 sequences. The species could also be distinguished from the closely related species, C. musiphila, C. spandovensis and C. sergipensis, by growth on vitamin-free medium and at 37 °C. The type strain is Wickerhamiella allomyrinae sp. nov. NYNU 13920T ( = CICC 33031T = CBS 13167T).

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