Effects of end-group termination on salting-out constants for triglycine

0421956 - ÚOCHB 2014 RIV US eng J - Journal Article
Hladílková, Jana - Heyda, J. - Rembert, K. B. - Okur, H. I. - Kurra, Y. - Liu, W. R. - Hilty, Ch. - Cremer, P. S. - Jungwirth, Pavel
Effects of end-group termination on salting-out constants for triglycine.
Journal of Physical Chemistry Letters. Roč. 4, č. 23 (2013), s. 4069-4073. ISSN 1948-7185
R&D Projects: GA ČR GBP208/12/G016
Institutional support: RVO:61388963
Keywords : ions * Hofmeister series * triglycine * NMR * molecular dynamics
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 6.687, year: 2013

Salting-out constants for triglycine were calculated for a series of Hofmeister salts using molecular dynamics simulations. Three variants of the peptide were considered with both termini capped, just the N-terminus capped, and without capping. The simulations were supported by NMR and FTIR measurements. The data provide strong evidence that previous experimental values of salting-out constants assigned to the fully capped peptide (as previously assumed) should have been assigned to the half-capped peptide instead. Therefore, these values cannot be used to directly establish Hofmeister ordering of ions at the peptide backbone because they are strongly influenced by interactions of the ions with the negatively charged C terminus.
Permanent Link: http://hdl.handle.net/11104/0228266