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Crystal and molecular structure of V‐anhydrous amylose by William T. Winter; A. Sarko is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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## Abstract The conformation and crystalline packing of V‐anhydrous amylose has been investigated by a combination of linked atom model building and X‐ray diffraction analysis. The unit cell, the P2~1~2~1~2~1~ space group, the left‐handed sixfold helical conformation with all O(6) in __gt__ rotational positions, and the intrahelical O(2)‐‐‐O(3) and O(2)‐‐‐O(6) hydrogen bonds are substantially in agreement with previous studies. A new model for packing of the chains in the unit cell and the presence of crystallographic water is proposed. Packing appears to be stabilized by corner‐to‐center chain O(2)‐‐‐O(2) hydrogen bonds. The nature of the transition from the amylose–DMSO complex to V~__a__~‐amylose was considered and it is shown that the transition involves translation of the amylose chains parallel to the __a__ and __b__ unit cell axes with only slight changes in the orientation of the helix. No significant conformational changes result from the transition.

Who reads Crystal and molecular structure of V‐anhydrous amylose?

Author

William T. Winter; A. Sarko

Publisher

Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0006-3525)

Published

1974

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)