✦ LIBER ✦
1H and 13C NMR study of phosphopeptides: 2—Ac–PSer–Gly, Ala–PSer–Gly and Gly–PSer–Phe
✍ Scribed by L. Pogliani; D. Ziessow
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- English
- Weight
- 437 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
H and 13C NMR spectra of AC-PSer-Gly, Ala-PSer-Gly and Gly-PSer-Phe have been measured and analysed as a function of pD. The NMR parameters of the Beryl side chain are a function of the sequence. The second titration step of the phosphate group (pK, = 5.7) is much more difEcdt to detect in AcPSer-Gly and Ala-PSer-Gly than in Gly-PSer-Phe. The conformation in which H-a-C-a-C-&O-P forms a planar W-type arrangement predominates only for Ala-PSer-Gly. In the other two phosphopeptides the gauche conformations contribute increasingly, in particular for Gly-PSer-Phe.