期刊
FEBS LETTERS
卷 554, 期 3, 页码 337-341出版社
WILEY
DOI: 10.1016/S0014-5793(03)01184-0
关键词
copper content; silk spinning; complex formation; conformation transition; spectrophotometry; Bombyx mori silk fibroin
Evidence is presented here that cupric ions play a part in the natural spinning of Bombyx mori silk. Proton induced X-ray emission studies revealed that the copper content increased from the posterior part to the anterior part of silk gland, and then further increased in the silk fiber. Spectrophotometric analysis demonstrated that cupric ions formed coordination complexes with silk fibroin chains while Raman spectroscopy indicated that they induced a conformation transition from random coil/helix to beta-sheet. Taken together these findings indicate that copper could play a role in the natural spinning process in silkworms. (C) 2003 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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