NDLI: On the Classes of Aminoacyl-tRNA Synthetases, Amino Acids and the Genetic Code

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On the Classes of Aminoacyl-tRNA Synthetases, Amino Acids and the Genetic Code

Content Provider	Springer Nature Link
Author	Cavalcanti, Andre R. O. Soares Leite, Elisa Neto, Benício B. Ferreira, Ricardo
Copyright Year	2004
Abstract	The division of the aminoacyl-tRNA synthetases in two classes is compared with a division of the amino acids in two classes, obtained from the AAIndex databank by a principal component analysis. The division of the enzymes in Classes I and II follows to a great extent a division in the chemical and biological properties of their cognate amino acids. Furthermore, the phylogenetic trees of Classes I and II enzymes are highly correlated with dendrograms obtained for their cognate amino acids by using the indices in the AAIndex database. We argue that the evolution of aminoacyl-tRNA synthetases was determined by the characteristics of their corresponding amino acids. We interpret these results considering modelsfor the origin and evolution of the genetic code in which an initial version, containing fewer amino acids, was modified by the incorporationof new amino acids following duplication and divergence of previoussynthetases and tRNA molecules.
Starting Page	407
Ending Page	420
Page Count	14
File Format	PDF
ISSN	01696149
Journal	Origins of Life and Evolution of Biospheres
Volume Number	34
Issue Number	4
e-ISSN	15730875
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2004-01-01
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Organic Chemistry Geochemistry Biochemistry
Content Type	Text
Resource Type	Article
Subject	Medicine Ecology, Evolution, Behavior and Systematics Space and Planetary Science

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