Three-dimensional structure of guaran

被引：15

作者：

Chandrasekaran, R

Bian, W

Okuyama, K

机构：

[1] Purdue Univ, Whistler Ctr Carbohydrate Res, W Lafayette, IN 47907 USA

[2] Tokyo Univ Agr & Technol, Fac Technol, Tokyo 184, Japan

来源：

CARBOHYDRATE RESEARCH | 1998年 / 312卷 / 04期

关键词：

guaran; galactomannan; X-ray diffraction; three-dimensional structure;

D O I：

10.1016/S0008-6215(98)00249-3

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The galactosyl side chains were inadvertently fixed in the improper beta-D configuration in a previously reported morphology of guaran [R. Chandrasekaran, A. Radha, and K. Okuyama, Carbohydr. Res. 306 (1998) 243-255]. This defect has mow been rectified. In the correct alpha-D configuration, the 2-fold guaran helix is stabilized by periodic intramolecular hydrogen bonds between the galactosyl side chains and the mannan main chain. Ordered water molecules are responsible for the formation and association of sheets of guaran helices in the crystalline lattice. The crystallographic R-value is 0.14 fbr the revised model. The guaran molecular structure and packing arrangement are readily amenable to the entire galactomannan family. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：219 / 224

页数：6

共 4 条

[1]

[Anonymous], INT TABLES XRAY CRYS

[2] STRUCTURE OF POLY D(A) . POLY D(T) [J].