Cited by 1,140RNA and protein synthesis mechanismsDNA and Nucleic Acid ChemistryRNA Research and Splicing

Thermodynamic parameters for an expanded nearest-neighbor model for formation of RNA duplexes with Watson–Crick base pairs

Xia, Tianbing, SantaLucia, John, Burkard, Mark E., Kierzek, Ryszard, Schroeder, Susan J., Jiao, Xiaoqi, Cox, Christopher, Turner, Douglas H.·1998·Biochemistry

Abstract

Improved thermodynamic parameters for prediction of RNA duplex formation are derived from optical melting studies of 90 oligoribonucleotide duplexes containing only Watson-Crick base pairs. To test end or base composition effects, new sets of duplexes are included that have identical nearest neighbors, but different base compositions and therefore different ends. Duplexes with terminal GC pairs are more stable than duplexes with the same nearest neighbors but terminal AU pairs. Penalizing terminal AU base pairs by 0.45 kcal/mol relative to terminal GC base pairs significantly improves predictions of DeltaG degrees37 from a nearest-neighbor model. A physical model is suggested in which the differential treatment of AU and GC ends accounts for the dependence of the total number of Watson-Crick hydrogen bonds on the base composition of a duplex. On average, the new parameters predict DeltaG degrees37, DeltaH degrees, DeltaS degrees, and TM within 3.2%, 6.0%, 6.8%, and 1.3 degreesC, respectively. These predictions are within the limit of the model, based on experimental results for duplexes predicted to have identical thermodynamic parameters.

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Crossref · 10.1021/bi9809425

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Authors
Xia, T., SantaLucia, J., Burkard, M. E., Kierzek, R., Schroeder, S. J., Jiao, X., Cox, C., & Turner, D. H.
Affiliations
Wayne State University (US)
Corresponding author
Turner, Douglas H.
Venue
Biochemistry
Published
1998-10-01
Volume
37
Issue
42
Pages
14719-14735
ISSN
  • 0006-2960 (ISSN-L)
  • 1520-4995
OpenAlex
W2051713039
Cited by
1,140
References
92
Citations by year
2026: 27 · 2025: 35 · 2024: 33 · 2023: 41 · 2022: 58 · 2021: 32 · 2020: 30 · 2019: 53 · 2018: 43 · 2017: 40 · 2016: 44 · 2015: 61 · 2014: 54 · 2013: 55 · 2012: 65
FWCI
4.88
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemistry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Francis Crick Institute
  • National Cancer Institute (P30CA086862)
  • National Institute of General Medical Sciences (GM 22939, R01GM022939)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
Keywords
RNA duplex formation, Watson-Crick base pairing, free energy prediction, enthalpy and entropy, melting point, hydrogen bonding
MeSH terms
Base Sequence, Hydrogen Bonding, Models, Chemical, Nucleic Acid Conformation, Nucleic Acid Heteroduplexes, RNA, Thermodynamics, Linear Models, Databases, Factual, Base Pairing

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