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An amylose antiparallel double helix at atomic resolution.

Authors
  • Hinrichs, W
  • Büttner, G
  • Steifa, M
  • Betzel, C
  • Zabel, V
  • Pfannemüller, B
  • Saenger, W
Type
Published Article
Journal
Science (New York, N.Y.)
Publication Date
Oct 09, 1987
Volume
238
Issue
4824
Pages
205–208
Identifiers
PMID: 17800460
Source
Medline
License
Unknown

Abstract

In the crystal structure of the polyiodide complex (p-nitrophenyl-alpha-maltohexaose(2)) . Ba(I(3))(2) . 22H(2)O, the maltohexaose units form an antiparallel, left-handed double helix with O-2 ... O-3 and O-6 ... O-6 hydrogen bonding and a central cavity that encloses two triiodide units. This structure contrasts with the parallel, left-handed double helix with no central cavity proposed for the A-and B-starch helix and the left-handed single helix in V-amylose and may be relevant for the stabilization of glycogen Structure.

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