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  • 标题:Conformation of uncomplexed natural antamanide crystallized from CH3CN/H2O
  • 本地全文:下载
  • 作者:Isabella L. Karle ; T. Wieland ; D. Schermer
  • 期刊名称:Proceedings of the National Academy of Sciences
  • 印刷版ISSN:0027-8424
  • 电子版ISSN:1091-6490
  • 出版年度:1979
  • 卷号:76
  • 期号:4
  • 页码:1532-1536
  • DOI:10.1073/pnas.76.4.1532
  • 语种:English
  • 出版社:The National Academy of Sciences of the United States of America
  • 摘要:Natural antamanide, a cyclic decapeptide from Amanita phalloides, has been shown to have the same conformation for the backbone and comparable side groups as the biologically active synthetic [Phe4, Val6]antamanide. Packing in the crystal is quite different for the two compounds. Large channels with a polar lining are formed in the crystals of [Phe4, Val6]antamanide, whereas in natural antamanide large channels in the crystal are completely surrounded by the lipophilic side groups of the Pro, Phe, and Ala residues. Antamanide, C64H78N10O10{middle dot}8H2O{middle dot}X, crystallizes in space group P212121 with a = 15.88 A, b = 34.88 A, and c = 13.61 A.
  • 关键词:bound water ; solvent channels ; hydrogen bonds ; x-ray analysis
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