NDLI: Distinctive features of large complex virus genomes and proteomes

Content Provider	PubMed Central
Author	Mrázek, Jan Karlin, Samuel
Copyright Year	2007
Abstract	More than a dozen large DNA viruses exceeding 240-kb genome size were recently discovered, including the “giant” mimivirus with a 1.2-Mb genome size. The detection of mimivirus and other large viruses has stimulated new analysis and discussion concerning the early evolution of life and the complexity and mechanisms of evolutionary transitions. This paper presents analysis in three contexts. (i) Genome signatures of large viruses tend to deviate from the genome signatures of their hosts, perhaps indicating that the large viruses are lytic in the hosts. (ii) Proteome composition within these viral genomes contrast with cellular organisms; for example, most eukaryotic genomes, with respect to acidic residue usages, select Glu over Asp, but the opposite generally prevails for the large viral genomes preferring Asp more than Glu. In comparing Phe vs. Tyr usage, the viral genomes select mostly Tyr over Phe, whereas in almost all bacterial and eukaryotic genomes, Phe is used more than Tyr. Interpretations of these contrasts are proffered with respect to protein structure and function. (iii) Frequent oligonucleotides and peptides are characterized in the large viral genomes. The frequent words may provide structural flexibility to interact with host proteins.
Related Links	http://dx.doi.org/10.1073/pnas.0700429104
Ending Page	5132
Page Count	6
Starting Page	5127
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	12
Volume Number	104
Language	English
Publisher	National Academy of Sciences
Publisher Date	2007-03-20
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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