On the presence of rotational Ewald artifacts in the equilibrium and dynamical properties of a zwitterionic tetrapeptide in aqueous solution

Paul E. Smith, Herb D. Blatt, Bernard Pettitt

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

The presence of Ewald artifacts in a molecular dynamics simulation of a zwitterionic tetrapeptide in aqueous solution has been investigated. Both equilibrium and dynamical aspects of the rotational behavior of the peptide were examined. The equilibrium distribution of rotational states obtained from a 10 ns simulation were consistent, within statistical errors, with a random distribution free from Ewald artifacts. The rotational dynamics of the peptide was observed to obey simple Debye diffusion with a rotational diffusion rate in agreement with that predicted by a simple rotational diffusion model assuming no substantial long-lived water hydration shell. These results suggest that rotational Ewald artifacts will be negligible for small biomolecular simulations in solvents with high relative permittivities. The data support the results obtained from a previous study of simpler model systems.

Original languageEnglish (US)
Pages (from-to)3886-3890
Number of pages5
JournalJournal of Physical Chemistry B
Volume101
Issue number19
StatePublished - May 8 1997
Externally publishedYes

Fingerprint

artifacts
aqueous solutions
Peptides
peptides
simulation
rotational states
statistical distributions
Hydration
hydration
Molecular dynamics
Permittivity
permittivity
molecular dynamics
Water
Computer simulation
water

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

On the presence of rotational Ewald artifacts in the equilibrium and dynamical properties of a zwitterionic tetrapeptide in aqueous solution. / Smith, Paul E.; Blatt, Herb D.; Pettitt, Bernard.

In: Journal of Physical Chemistry B, Vol. 101, No. 19, 08.05.1997, p. 3886-3890.

Research output: Contribution to journalArticle

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