Abstract
The function of the terminal A of tRNA Phe (yeast) with respect to complex formation with the cognate aminoacyl-tRNA synthetase has been studied using equilibrium and fast kinetic techniques. Removal of the terminal A influences the equilibrium parameters of the tRNA-synthetase interaction only slightly, the mechanism of complex formation, however, is changed significantly. The binding mechanism of unmodified tRNAPhe comprises a recombination step and a consecutive conformational change. In contrast, the reaction between tRNAPheCC and the cognate synthetase is characterized by a simple one step mechanism. It is concluded that the terminal A is responsible for the occurrence of the conformational change of the tRNA-synthetase complex. The conformational change is interpreted as a proper alignment of the terminal A of the tRNA to the active site of the synthetase.
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- Blanquet S., Dessen P. Antico-operative binding of bacterial and mammalian initiator tRNAMet to methionyl-tRNA synthetase from escherichia coli. J Mol Biol. 1976 Jun 5;103(4):765–784. doi: 10.1016/0022-2836(76)90208-4. [DOI] [PubMed] [Google Scholar]
- Eigen M. New looks and outlooks on physical enzymology. Q Rev Biophys. 1968 May;1(1):3–33. doi: 10.1017/s0033583500000445. [DOI] [PubMed] [Google Scholar]
- Fersht A. R., Kaethner M. M. Enzyme hyperspecificity. Rejection of threonine by the valyl-tRNA synthetase by misacylation and hydrolytic editing. Biochemistry. 1976 Jul 27;15(15):3342–3346. doi: 10.1021/bi00660a026. [DOI] [PubMed] [Google Scholar]
- Krauss G., Peters F., Maass G. Effect of excision of the Y-base on the interaction of tRNAPhe (yeast) with phenylalanyl-tRNA synthetase (yeast). Nucleic Acids Res. 1976 Mar;3(3):631–639. doi: 10.1093/nar/3.3.631. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Krauss G., Pingoud A., Boehme D., Riesner D., Peters F., Maas G. Equivalent and non-equivalent binding sites for tRNA on aminoacyl-tRNA synthetases. Eur J Biochem. 1975 Jul 15;55(3):517–529. doi: 10.1111/j.1432-1033.1975.tb02189.x. [DOI] [PubMed] [Google Scholar]
- Krauss G., Riesner D., Maass G. Mechanism of discrimination between cognate and non-cognate tRNAs by phenylalanyl-tRNA synthetase from yeast. Eur J Biochem. 1976 Sep;68(1):81–93. doi: 10.1111/j.1432-1033.1976.tb10766.x. [DOI] [PubMed] [Google Scholar]
- Krauss G., Römer R., Riesner D., Maass G. Thermodynamics and kinetics of the interaction of phenylalanine-specific tRNA from yeast with its cognate synthetase as studied by the flourescence of the Y-base. FEBS Lett. 1973 Feb 15;30(1):6–10. doi: 10.1016/0014-5793(73)80606-4. [DOI] [PubMed] [Google Scholar]
- Litt M. A simple procedure for the purification of yeast phenylalanine transfer RNA. Biochem Biophys Res Commun. 1968 Aug 13;32(3):507–511. doi: 10.1016/0006-291x(68)90691-8. [DOI] [PubMed] [Google Scholar]
- Pingoud A., Riesner D., Boehme D., Maass G. Kinetic studies on the interaction of seryl-tRNA synthetase with tRNA(Ser) and ser-tRNA(ser) from yeast. FEBS Lett. 1973 Feb 15;30(1):1–5. doi: 10.1016/0014-5793(73)80605-2. [DOI] [PubMed] [Google Scholar]
- Riesner D., Pingoud A., Boehme D., Peters F., Maass G. Distinct steps in the specific binding of tRNA to aminoacyl-tRNA synthetase. Temperature-jump studies on the serine-specific system from yeast and the tyrosine-specific system from Escherichia coli. Eur J Biochem. 1976 Sep;68(1):71–80. doi: 10.1111/j.1432-1033.1976.tb10765.x. [DOI] [PubMed] [Google Scholar]
- Rigler R., Pachmann U., Hirsch R., Zachau H. G. On the interaction of seryl-tRNA synthetase with tRNA Ser. A contribution to the problem of synthetase-tRNA recognition. Eur J Biochem. 1976 May 17;65(1):307–315. doi: 10.1111/j.1432-1033.1976.tb10418.x. [DOI] [PubMed] [Google Scholar]
- Sprinzl M., Cramer F. Site of aminoacylation of tRNAs from Escherichia coli with respect to the 2'- or 3'-hydroxyl group of the terminal adenosine. Proc Natl Acad Sci U S A. 1975 Aug;72(8):3049–3053. doi: 10.1073/pnas.72.8.3049. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sternbach H., von der Haar F., Schlimme E., Gaertner E., Cramer F. Isolation and properties of tRNA nucleotidyl transferase from yeast. Eur J Biochem. 1971 Sep 24;22(2):166–172. doi: 10.1111/j.1432-1033.1971.tb01528.x. [DOI] [PubMed] [Google Scholar]
- Tal J., Deutscher M. P., Littauer U. Z. Biological activity of Escherichia coli tRNA Phe modified in its C-C-A terminus. Eur J Biochem. 1972 Aug 4;28(4):478–491. doi: 10.1111/j.1432-1033.1972.tb01935.x. [DOI] [PubMed] [Google Scholar]
- Von Der Haar F., Gaertner E. Phenylalanyl-tRNA synthetase from baker's yeast: role of 3'-terminal adenosine of tRNA-Phe in enzyme-substrate interaction studied with 3'-modified tRNA-Phe species. Proc Natl Acad Sci U S A. 1975 Apr;72(4):1378–1382. doi: 10.1073/pnas.72.4.1378. [DOI] [PMC free article] [PubMed] [Google Scholar]
- von der Haar F., Cramer F. Hydrolytic action of aminoacyl-tRNA synthetases from baker's yeast: "chemical proofreading" preventing acylation of tRNA(I1e) with misactivated valine. Biochemistry. 1976 Sep 7;15(18):4131–4138. doi: 10.1021/bi00663a034. [DOI] [PubMed] [Google Scholar]