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Conformational Study of Y-Base in Yeast tRNA$^{phe}$

  • Moon, Myung-Jun (Department of Chemistry, Korea Advanced Institute of Science and Technology) ;
  • Jhon, Mu-Shik (Department of Chemistry, Korea Advanced Institute of Science and Technology) ;
  • Kang, Young-Kee (Department of Chemistry, College of Natural Sciences, Chungbuk National University.)
  • 발행 : 1983.06.20

초록

To understand the importance of Y-base adjacent to the anticodon stabilizing codon-anticodon interaction, a study has been undertaken for the model compound involving the interaction between Y-base and anticodon as well as the participation of water molecule by calculating the conformational free energy using an empirical potential function. We restrict our analysis to sites directly associated with Y-base by varying only the backbone torsion angles of Y-base. The hydration and $Mg^{+2}$ binding effects on the conformational stability of Y-base are calculated and discussed. The free Y-base is proved to be less stable than the hydrated one. The free energy change due to the hydration of Y-base amounts to -119.5 kcal/mole, in which the conformational energy change is -142.4 kcal/mole and the configurational entropy change is -76.9 e. u. It is found that the water molecules bound to Y-base and $Mg^{+2}$ contribute to the conformation of Y-base dominantly.

키워드

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피인용 문헌

  1. Conformational study of the trinucleotide CpGpCp‐pentapeptide Gly5 complex: The important role of bridging water in the complex formation vol.7, pp.2, 1983, https://doi.org/10.1002/jcc.540070212
  2. Studies on hydroxy inclusion complexes. I. Host-guest interaction of the molecular complexes of 9-hydroxy-9-(1-propynyl) fluorene and 1,1-Bis (2,4-dimethylphenyl)-2-butyn-1-ol with water, methanol, et vol.5, pp.5, 1983, https://doi.org/10.1007/bf00662996