Structural analysis of a pectic polysaccharide from the leaves of Diospyros kaki
文献类型：期刊论文
| 作者 | Duan, JY; Zheng, Y; Dong, Q; Fang, JN |
| 刊名 | PHYTOCHEMISTRY
 |
| 出版日期 | 2004-03 |
| 卷号 | 65期号:5页码:609-615 |
| 关键词 | Diospyros kaki Ebenaccae pectin structure polysaccharide rhamnogalacturonan |
| ISSN号 | 0031-9422 |
| DOI | 10.1016/j.phytochem.2003.12.002 |
| 文献子类 | Article |
| 英文摘要 | A pectic polysaccharide DL-2A with a molar mass of 8.5 x 10(5), was obtained from the boiling water extract of Diospyros kaki leaves. It had [alpha](D)(20) -21.8degrees (c 0.22, H(2)O) and consisted of rhamnose, arabinose, galactose, xylose and galacturonic acid units in the molar ratio of 0.4:3.4:2.4:1.0:0.8, along with traces of glucuronic acid. About 16.7% of galacturonic acid existed as the methyl ester. A combination of linkage analyses, periodate oxidation, partial acid hydrolysis, selective lithium-degraded reaction, ESIMS, (1)H- and (13)C- NMR spectral analyses revealed its structural features. It was found that DL-2A possessed an alpha(1-->4)-galacturonan backbone with some insertions of alpha-1,2-Rhap residues. The side-chains of arabino-3,6-galactan were attached to the backbone via O-4 of Rhap residues and O-3 of GalAp residues, while 4-linked xylose residues (forming short linear chains) were directly linked to O-4 of rhamnose residues, not as part of the xylogalacturonan. These novel structural features enlarge the knowledge on the fine structure of pectic substances in the plant kingdom. (C) 2003 Elsevier Ltd. All rights reserved. |
| WOS关键词 | IMMUNOLOGICAL ACTIVITY ; ACIDIC HETEROGLYCANS ; FEATURES ; DEGRADATION ; RHAMNOGALACTURONAN ; ARABINOGALACTAN ; METHYLATION ; SUBSTANCES ; ROOTS |
| WOS研究方向 | Biochemistry & Molecular Biology ; Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000220311500013 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.183/handle/2S10ELR8/274112]  |
| 专题 | 药理学第三研究室 |
| 通讯作者 | Fang, JN |
| 作者单位 | Chinese Acad Sci, Shanghai Inst Biol Sci, Shanghai Inst Mat Med, Shanghai 201203, Peoples R China |
| 推荐引用方式 GB/T 7714 | Duan, JY,Zheng, Y,Dong, Q,et al. Structural analysis of a pectic polysaccharide from the leaves of Diospyros kaki[J]. PHYTOCHEMISTRY,2004,65(5):609-615. |
| APA | Duan, JY,Zheng, Y,Dong, Q,&Fang, JN.(2004).Structural analysis of a pectic polysaccharide from the leaves of Diospyros kaki.PHYTOCHEMISTRY,65(5),609-615. |
| MLA | Duan, JY,et al."Structural analysis of a pectic polysaccharide from the leaves of Diospyros kaki".PHYTOCHEMISTRY 65.5(2004):609-615. |
入库方式： OAI收割
来源：上海药物研究所
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