RNAs that catalyse their own aminoacylation have been recently selected in vitro. These findings support the notion that the primitive aminoacyl-tRNA synthetases may have been RNAs. In this paper, we propose a structural model for the first aminoacyl-tRNA synthetase consisting of an RNA complex form
The Non-monophyletic Origin of the tRNA Molecule
β Scribed by Massimo Di Giulio
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 160 KB
- Volume
- 197
- Category
- Article
- ISSN
- 0022-5193
No coin nor oath required. For personal study only.
β¦ Synopsis
Fο©ο§. 1. Phylogenetic relationships in a random sample of tRNAs specific for Phe and Tyr. The values on the branches refer to the bootstrap percentages (Swofford, 1993). See text for further information. Asp-tRNA Methanococ. vani. Asp-tRNA Methanotherm. fer. Asp-tRNA Mycoplasma capric. Asp-tRNA Bovine Trp-tRNA Halobacterium med. Trp-tRNA Arabidopsis thal. Trp-tRNA Chicken Trp-tRNA Caenorhabdi. eleg. Trp-tRNA Saccharomyces cer. Trp-tRNA Dictyostelium dis. Asp-tRNA Spiroplasma melif. Asp-tRNA Lactobac. bulg. Asp-tRNA Acholeplasma laid. Asp-tRNA Bacillus sp. PS3 Asp-tRNA Bacillus subtilis Asp-tRNA E. coli Asp-tRNA Euglena gracilis (chloro.) Asp-tRNA Marchantia polym. (chloro.) Trp-tRNA Mycoplasma capric. Trp-tRNA Acholeplasma laid. Trp-tRNA Bacillus subtilis Trp-tRNA Chlamydomo. reinh. (chloro.) Trp-tRNA Euglena gracilis (chloro.) Trp-tRNA Pisum sativum (chloro.) Trp-tRNA Spiroplasma citri Trp-tRNA E. coli. Trp-tRNA Mycoplasma capric. Trp-tRNA Spiroplasma citri Asp-tRNA Euglena gracilis Asp-tRNA Saccharomyces cer. Asp-tRNA Xenopus laevis Asp-tRNA Rabbit Asp-tRNA Halobacterium vol.
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Classical trajectories are calculated on model surfaces designed to reproduce the reactive-unreactive bands found with the SShlK and Yates-Lester surfaces for the H + Hz system cmd other A f BC systems. The model surfaces are based on a rectiIinear reaction path, with a constant period of vibration,