Solution conformations of penta and heptapeptides containing repetitive α-aminoisobutyryl-l-alanyl and α -aminoisobutyryl-l-valyl sequences
作者:E.K.S. Vijayakumar、P. Balaram
DOI:10.1016/s0040-4020(01)91984-2
日期:1983.1
The presence of folded solution conformations in the peptides Boc-Ala-(Aib-Ala)2-OMe, Boc-Val-(Aib-Val) 2-OMe, Boc-Ala-(Aib-Ala)3-OMe and Boc-Val-(Aib-Val)3-OMe has been established by 270MHz 1H NMR. Intramolecularly H-bonded NH groups have been identified using temperature and solvent dependence of NHchemicalshifts and paramagnetic radical induced broadening of NH resonances. Both pentapeptides adopt