Structural and energetic factors controlling the enantioselectivity of dinucleotide formation under prebiotic conditions

Literature Information

Publication Date 2013-02-27
DOI 10.1039/C3CP44156C
Impact Factor 3.676
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Abstract

Recently, it has been reported that the montmorillonite-catalyzed oligomerization of activated nucleotides exhibits remarkable enantioselectivity. In the current paper we investigate the structures and intrinsic energies of homochiral and heterochiral cyclic dinucleotides by means of accurate quantum chemical calculations in gas-phase and in bulk water. The steric effect of the clay is represented with geometrical constraints. Our computations reveal that the heterochiral dimer geometries are systematically less stable than their homochiral counterparts due to steric clashes inside the sugar–phosphate ring geometry. Thus we suggest that the homochiral selectivity observed in the cyclic dinucleotide formation in confined spaces may arise from the energetic destabilization of the heterochiral ring geometries as compared to their homochiral analogues. In the present paper we provide the first model of the 3D structure of D,L cyclic dinucleotides, which until now has eluded experimental observation.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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