Journal ArticleDOI
Effect of Disulfide Bonds in Antifungal Peptide from Petunia Hybrida: A Molecular Dynamics Study
TLDR
No large change in the tertiary structure conformation is observed till 400 K, which demonstrates the high thermal stability of the protein, and it is shown that the mutation of disulfide bonds did not result in a drastic conformational change.Abstract:
The solution structure of a novel plant defensin (PhD1) contains a fifth disulfide bond, unlike other plant defensins, which have four disulfide bonds. The present study aims to better understand the stability, thermal dependence and the role of disulfide bonds in the tertiary structure of PhD1 using Molecular Dynamics (MD) simulations. The secondary structures are intact in the native structure simulated at 300 K. However, in the mutant structures a small variation is observed. A significant shift in the peptide conformation is observed when the additional fifth disulfide bond (Cys7-Cys23) is mutated. No large change in the tertiary structure conformation is observed till 400 K, which demonstrates the high thermal stability of the protein. Here, we also show that the mutation of disulfide bonds did not result in a drastic conformational change. The antifungal property along with high structural stability of the plant defensin protein makes it a promising candidate for the development of novel fungicides.read more
Citations
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Analysis of mutations of defensin protein using accelerated molecular dynamics simulations.
Bharati Pandey,Chetna Tyagi,Gopal Kumar Prajapati,Awdhesh Kumar Mishra,Abeer Hashem,Abdulaziz A. Alqarawi,Elsayed Fathi Abd_Allah,Tapan Kumar Mohanta +7 more
TL;DR: Analysis of the free energy change revealed that G9R and V39R mutations exert a neutral and stabilizing effect on RsAFP2 conformation, which is supported by the observed lower total energy of mutants compared to the wild-type, suggesting that enhanced stability of the mutants.
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From Anna University to America and to Agriculture.
TL;DR: Anna University (AU) is an awesome alma mater for attracting the attention of the invincible through awareness from education, it is a place with a plan for preparing a palace in a person's life and an avenue for America through adequate cGPA and Advanced GRE with good TOEFL score.
References
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Journal ArticleDOI
Particle mesh Ewald: An N⋅log(N) method for Ewald sums in large systems
TL;DR: An N⋅log(N) method for evaluating electrostatic energies and forces of large periodic systems is presented based on interpolation of the reciprocal space Ewald sums and evaluation of the resulting convolutions using fast Fourier transforms.
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GROMACS: Fast, flexible, and free
David van der Spoel,Erik Lindahl,Berk Hess,Gerrit Groenhof,Alan E. Mark,Herman J. C. Berendsen +5 more
TL;DR: The software suite GROMACS (Groningen MAchine for Chemical Simulation) that was developed at the University of Groningen, The Netherlands, in the early 1990s is described, which is a very fast program for molecular dynamics simulation.
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LINCS : A linear constraint solver for molecular simulations
TL;DR: Although the derivation of the algorithm is presented in terms of matrices, no matrix matrix multiplications are needed and only the nonzero matrix elements have to be stored, making the method useful for very large molecules.
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Development and Testing of the OPLS All-Atom Force Field on Conformational Energetics and Properties of Organic Liquids
TL;DR: In this article, the parametrization and testing of the OPLS all-atom force field for organic molecules and peptides are described, and the parameters for both torsional and non-bonded energy properties have been derived, while the bond stretching and angle bending parameters have been adopted mostly from the AMBER force field.