By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Peptides have been published. According to news reporting originating in Suzhou, People's Republic of China, by NewsRx journalists, research stated, "The dynamics of Na+ transportation in a transmembrane cyclic peptide nanotube of 8 x (WL)(4)/POPE has been simulated. The curve of PMF (potential of mean force) for Na+ moving through the tube, based on ABF (adaptive biasing force) method, indicates that Na+ possesses lower free energy in an alpha-plane region than in a mid-plane one."
The news reporters obtained a quote from the research from Soochow University, "It was found that Na+ would desorb one or two water molecules in the first solvation shell when entering the tube and later maintain in a solvation state. The average numbers of water molecules around Na+ are 4.50, 4.09 in the first solvation shell, and 3.10, 4.08 in the second one for Na+ locating in an alpha-plane zone and a mid-plane region, respectively. However, water molecules far away from Na+ location still nearly arrange in a form of 1-2-1-2 file. The dipole orientations of water molecules in the regions of gaps 1 and 7 display 'D-defects', resulted from the simultaneous electrostatic potentials generated by Na+ and the bare carbonyls at the tube mouths."
According to the news reporters, the research concluded: "Such 'D-defects' accommodate the energetically favorable water orientations thereby."
For more information on this research see: Molecular dynamics study of Na+ transportation in a cyclic peptide nanotube and its influences on water behaviors in the tube. Journal of Molecular Modeling, 2013;19(10):4271-4282. Journal of Molecular Modeling can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA. (Springer - www.springer.com; Journal of Molecular Modeling - www.springerlink.com/content/1610-2940/)
Our news correspondents report that additional information may be obtained by contacting X.Z. Song, Soochow Univ, Fac Chem Chem Engn & Mat Sci, Suzhou 215123, People's Republic of China. Additional authors for this research include J.F. Fan, D.Y. Liu, H. Li and R. Li (see also Peptides).
Keywords for this news article include: Asia, Suzhou, Physics, Cyclic Peptides, Peptide Nanotubes, Molecular Dynamics, People's Republic of China
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