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A conformational study of a glutamine- and proline-rich cereal seed protein, C hordein.

By A S Tatham, A F Drake and P R Shewry

Abstract

A combination of c.d. spectroscopy and computer prediction is used to show that C hordein has an unusual secondary structure with an absence of alpha-helix and beta-sheet, but the presence of regularly repeated beta-turns. This is associated with a repetitive primary structure based mainly on blocks of eight residues. Similar spectral changes occurred when the protein was heated from 6 to 86 degrees C in aq. 70% (v/v) ethanol or dissolved in increasing concentrations (50-100%, v/v) of trifluoroethanol in water. The studies indicated that the conformation is stabilized by strong hydrophobic interactions and by extensive hydrogen-bonding

Topics: Research Article
Year: 1985
DOI identifier: 10.1042/bj2260557
OAI identifier: oai:pubmedcentral.nih.gov:1144744
Provided by: PubMed Central
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