Side Chain Torsional Angles and Rotational Isomerism of Oxytocin in Aqueous Solution

Herman R. Wyssbrod, Alberto Ballardin, I. L. Schwartz, Roderich Walter, Georges Van Binst, William A. Gibbons, William C. Agosta, F. H. Field, David Cowburn

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Proton NMR spectra of oxytocin in aqueous solution over the temperature range 0-60 °C were measured, and the vicinal coupling constants and chemical shifts of α and β protons and their temperature dependencies were derived. The possible fixed dihedral angles of the Cα-Cβ bonds in the cystyl region of the ring and the populations of several interconverting staggered rotamers were calculated. The small temperature dependencies suggest that there are no marked changes in conformation over the temperature range studied. These results add to our knowledge of the dynamic conformation of oxytocin in solution and are useful in considering possible biologically active conformers.

Original languageEnglish (US)
Pages (from-to)5273-5276
Number of pages4
JournalJournal of the American Chemical Society
Issue number16
StatePublished - 1977
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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