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Science 14 January 1994:
Vol. 263. no. 5144, pp. 191 - 197
DOI: 10.1126/science.7506844
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Articles

Science, Vol 263, Issue 5144, 191-197
Copyright © 1994 by American Association for the Advancement of Science

articles

The transfer RNA identity problem: a search for rules

ME Saks, Sampson JR, and JN Abelson

Division of Biology, California Institute of Technology, Pasadena 91125.

Correct recognition of transfer RNAs (tRNAs) by aminoacyl-tRNA synthetases is central to the maintenance of translational fidelity. The hypothesis that synthetases recognize anticodon nucleotides was proposed in 1964 and had considerable experimental support by the mid-1970s. Nevertheless, the idea was not widely accepted until relatively recently in part because the methodologies initially available for examining tRNA recognition proved hampering for adequately testing alternative hypotheses. Implementation of new technologies has led to a reasonably complete picture of how tRNAs are recognized. The anticodon is indeed important for 17 of the 20 Escherichia coli isoaccepting groups. For many of the isoaccepting groups, the acceptor stem or position 73 (or both) is important as well.


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