CONFORMATION OF POLY[(1-]3)-ALPHA-D-MALTOTRIOSE], A MAJOR PART OF THEELSINAN MOLECULE, STUDIED BY X-RAY-DIFFRACTION COUPLED WITH CONFORMATIONAL-ANALYSIS

Citation
K. Ogawa et al., CONFORMATION OF POLY[(1-]3)-ALPHA-D-MALTOTRIOSE], A MAJOR PART OF THEELSINAN MOLECULE, STUDIED BY X-RAY-DIFFRACTION COUPLED WITH CONFORMATIONAL-ANALYSIS, Bioscience, biotechnology, and biochemistry, 57(8), 1993, pp. 1338-1340
Citations number
14
Categorie Soggetti
Biology,Agriculture,"Biothechnology & Applied Migrobiology","Food Science & Tenology
ISSN journal
09168451
Volume
57
Issue
8
Year of publication
1993
Pages
1338 - 1340
Database
ISI
SICI code
0916-8451(1993)57:8<1338:COPAMP>2.0.ZU;2-#
Abstract
The molecular conformation of elsinan, consisting of (1 --> 3)-alpha-l inked maltotriose and alpha-maltotetraose units, was studied by X-ray diffraction coupled with conformational analysis. The quality of the X -ray fiber pattern obtained from elsinan was very poor, but the layer line spacing (45 angstrom), the probable presence of (005) reflection and a similar pattern with the powder pattern of a low molecular weigh t poly[(1 --> 3)-alpha-maltotriose] segment (DP about 35) suggested th at the poly[(1 --> 3)-linked-alpha-maltotriose] segment (MTR part) of elsinan chain took a five-fold helical structure with an asymmetric un it of maltotriose. Conformational analysis for the five-fold helix of the MTR part pointed out that two left handed helices, - 5/1 and - 5/2 , were energetically probable.