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Crystal and molecular structure of V-amylose complexed with butan-1-ol

Abstract : Chain-folded lamellar V-amylose single crystals were prepared by adding butan-1-ol to hot dilute aqueous solutions of native amylose. The base plane electron and X-ray diffraction patterns recorded from hydrated specimens agreed with a P212121 space group and an orthorhombic unit cell. A molecular model resulting from an exhaustive search of helix position and restrained structure refinement against diffraction data was proposed. The unit cell contains 4 antiparallel left-handed 6 fold amylose single helices with 1 butan-1-ol molecule located inside each of the helical cavities. In addition, 4 butan-1-ol and 20 water molecules are distributed in the 4 interstitial spaces. The amylose helices form rows along the b-axis that are alternatively shifted by ±b/8 with respect to one another, which validates the geometrical model proposed by Helbert and Chanzy in 1994.
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Contributor : Jean-Luc PUTAUX Connect in order to contact the contributor
Submitted on : Wednesday, February 16, 2022 - 12:46:53 PM
Last modification on : Sunday, February 27, 2022 - 3:28:44 AM
Long-term archiving on: : Tuesday, May 17, 2022 - 6:36:34 PM


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Cong Anh Khanh Le, Karim Mazeau, Yoshiharu Nishiyama, Yu Ogawa, Luc Choisnard, et al.. Crystal and molecular structure of V-amylose complexed with butan-1-ol. Polymer, Elsevier, 2022, 243, pp.124651. ⟨10.1016/j.polymer.2022.124651⟩. ⟨hal-03576868⟩



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