THERMODYNAMIC AND H-1-NMR STUDY OF PROTON COMPLEX-FORMATION OF HISTIDINE-CONTAINING CYCLODIPEPTIDES IN AQUEOUS-SOLUTION

被引:8
作者
ARENA, G [1 ]
IMPELLIZZERI, G [1 ]
MACCARRONE, G [1 ]
PAPPALARDO, G [1 ]
SCIOTTO, D [1 ]
RIZZARELLI, E [1 ]
机构
[1] CNR,IST STUDIO SOSTANZE NAT INTERESSE ALIMENTARE & CHIMICOFARMACEUT,CATANIA,ITALY
来源
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2 | 1992年 / 03期
关键词
D O I
10.1039/p29920000371
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A thermodynamic and H-1 NMR study of proton complex formation in aqueous solution of some L-histidine-containing cyclic L-dipeptides has been carried out. The enthalpic and entropic changes associated with protonation of the cyclodipeptides, obtained by potentiometric and calorimetric measurements, together with the H-1 NMR data and NOESY experiments, enable the role played by non-covalent interactions in proton complex formation to be assessed. In addition, a comparison with c(Glys-His) permits the influence of side-chain residues on the conformation of protonated species to be observed.
引用
收藏
页码:371 / 376
页数:6
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