Accurate energies of hydrogen bonded nucleic acid base pairs and triplets in tRNA tertiary interactions

Romina Oliva*, Luigi Cavallo, Anna Tramontano

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

Tertiary interactions are crucial in maintaining the tRNA structure and functionality. We used a combined sequence analysis and quantum mechanics approach to calculate accurate energies of the most frequent tRNA tertiary base pairing interactions. Our analysis indicates that six out of the nine classical tertiary interactions are held in place mainly by H-bonds between the bases. In the remaining three cases other effects have to be considered. Tertiary base pairing interaction energies range from -8 to -38 kcal/mol in yeast tRNAPhe and are estimated to contribute roughly 25% of the overall tRNA base pairing interaction energy. Six analyzed posttranslational chemical modifications were shown to have minor effect on the geometry of the tertiary interactions. Modifications that introduce a positive charge strongly stabilize the corresponding tertiary interactions. Non-additive effects contribute to the stability of base triplets.

Original languageEnglish (US)
Pages (from-to)865-879
Number of pages15
JournalNucleic acids research
Volume34
Issue number3
DOIs
StatePublished - Mar 20 2006

ASJC Scopus subject areas

  • Genetics

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