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Constructing Potential Energy Surface with Correlated Theory for Dipeptides Using Molecular Tailoring Approach.

Title: Constructing Potential Energy Surface with Correlated Theory for Dipeptides Using Molecular Tailoring Approach.
Authors: Khire SS; RIKEN Center for Computational Science, Kobe, 650-0047, Japan.; Department of Scientific Computing Modelling and Simulation, Savitribai Phule Pune University, Pune, 411 007, India.; Gattadahalli N; Department of Scientific Computing Modelling and Simulation, Savitribai Phule Pune University, Pune, 411 007, India.; Gurav ND; Department of Scientific Computing Modelling and Simulation, Savitribai Phule Pune University, Pune, 411 007, India.; Organisch-Chemisches Institut and Center for Multiscale Theory and Computation (CMTC), Westfälische Wilhelms-Universität Münster, Corrensstrasse 36, 48149, Münster, Germany.; Kumar A; School of Pharmacy, University of Maryland, Baltimore, 20 Penn Street, HSFII, Baltimore, Maryland, 21201, U.S.A.; Gadre SR; Department of Scientific Computing Modelling and Simulation, Savitribai Phule Pune University, Pune, 411 007, India.
Source: Chemphyschem : a European journal of chemical physics and physical chemistry [Chemphyschem] 2023 May 16; Vol. 24 (10), pp. e202200784. Date of Electronic Publication: 2023 Mar 09.
Publication Type: Journal Article
Language: English
Journal Info: Publisher: Wiley-VCH Verlag Country of Publication: Germany NLM ID: 100954211 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1439-7641 (Electronic) Linking ISSN: 14394235 NLM ISO Abbreviation: Chemphyschem Subsets: MEDLINE; PubMed not MEDLINE
Imprint Name(s): Original Publication: Weinheim, Germany : Wiley-VCH Verlag, c2000-
Abstract: We demonstrate a cost-effective alternative employing the fragment-based molecular tailoring approach (MTA) for building the potential energy surface (PES) for two dipeptides viz. alanine-alanine and alanine-proline employing correlated theory, with augmented Dunning basis sets. About 1369 geometries are generated for each test dipeptide by systematically varying the dihedral angles INLINEMATH and INLINEMATH . These conformational geometries are partially optimized by relaxing all the other Z-matrix parameters, fixing the values of INLINEMATH and INLINEMATH . The MP2 level PES is constructed from the MTA-energies of chemically intact geometries using minimal hardware. The fidelity of MP2/aug-cc-pVDZ level PES is brought out by comparing it with its full calculation counterpart. Further, we bring out the power of the method by reporting the MTA-based CCSD/aug-cc-pVDZ level PES for these two dipeptides containing 498 and 562 basis functions respectively.; (© 2023 Wiley-VCH GmbH.)
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Contributed Indexing: Keywords: Ramachandran plots; dipeptides; fragmentation method; molecular tailoring approach; potential energy surfaces
Entry Date(s): Date Created: 20230203 Date Completed: 20230516 Latest Revision: 20230516
Update Code: 20260130
DOI: 10.1002/cphc.202200784
PMID: 36735449
Database: MEDLINE

Journal Article