Structural and spectroscopic analysis of hydrogensquarates of glycine-containing tripeptides.
The hydrogensquarates of glycine-containing tripeptides glycylglycylglycine (H-Gly-Gly-Gly-OH), glycylglycylmethionine (H-Gly-Gly-Met-OH), and methionylglycylglycine (H-Met-Gly-Gly-OH) have been characterized structurally. Quantum chemical ab initio calculations, solid-state linear-dichroic infrared (IR-LD) spectroscopy, 1H and 13C NMR data, ESI-MS, HPLC-MS/MS, TGV, and DSC methods were employed. The structures consist in a positively charged peptide moiety and a negative hydrogensquarate anion (HSq), stabilized by strong intermolecular hydrogen bonds.
Koleva
Bojidarka B
BB
Sofia University St. Kl. Ohridsky Faculty of Chemistry, Department of Analytical Chemistry, 1164 Sofia, Bulgaria.
Kolev
Tsonko M
TM
Spiteller
Michael
M
D002152:Calorimetry, Differential Scanning; D002851:Chromatography, High Pressure Liquid; D005998:Glycine / Q000737:chemistry*; D006860:Hydrogen Bonding; D013058:Mass Spectrometry; D008715:Methionine / Q000737:chemistry; D015394:Molecular Structure; D008970:Molecular Weight; D019906:Nuclear Magnetic Resonance, Biomolecular; D009842:Oligopeptides / Q000737:chemistry*; D011487:Protein Conformation; D011522:Protons; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013055:Spectrophotometry, Infrared; D013818:Thermogravimetry
D009842:Oligopeptides; D011522:Protons; D008715:Methionine; D005998:Glycine