Document Detail

Genome wide survey and analysis of small repetitive sequences in caulimoviruses.
MedLine Citation:
PMID:  24999243     Owner:  NLM     Status:  Publisher    
Microsatellites are known to exhibit ubiquitous presence across all kingdoms of life including viruses. Members of the Caulimoviridae family severely affect growth of vegetable and fruit plants and reduce economic yield in diverse cropping systems worldwide. Here, we analyzed the nature and distribution of both simple and complex microsatellites present in complete genome of 44 species of Caulimoviridae. Our results showed, in all analyzed genomes, genome size and GC content had a weak influence on number, relative abundance and relative density of microsatellites, respectively. For each genome, mono- and dinucleotide repeats were found to be highly predominant and are overrepresented in genome of majority of caulimoviruses. AT/TA and GAA/AAG/AGA was the most abundant di- and trinucleotide repeat motif, respectively. Repeats larger than trinucleotide were rarely found in these genomes. Comparative study of occurrence, abundance and density of microsatellite among available RNA and DNA viral genomes indicated that simple repeats were least abundant in genomes of caulimoviruses. Polymorphic repeats eventhough rare were observed in the large intergenic region of the genome, indicating strand slippage and/or unequal recombination processes do occur in caulimoviruses. To our knowledge, this is the first analysis of microsatellites occurring in any dsDNA viral genome. Characterization of such variations in repeat sequences would be important in deciphering the origin, mutational processes, and role of repeat sequences in viral genomes.
Biju George; Prabu Gnanasekaran; S K Jain; Supriya Chakraborty
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-7-1
Journal Detail:
Title:  Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases     Volume:  -     ISSN:  1567-7257     ISO Abbreviation:  Infect. Genet. Evol.     Publication Date:  2014 Jul 
Date Detail:
Created Date:  2014-7-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101084138     Medline TA:  Infect Genet Evol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014. Published by Elsevier B.V.
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