Characterization of a novel dextran produced by Gluconobacter oxydans DSM 2003

Characterization of a novel dextran produced by Gluconobacter oxydans DSM 2003
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氧化葡糖杆菌产生的新型葡聚糖的表征 DSM 2003

DOI:
10.1007/s00253-011-3267-6
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发表时间:
2011-04
影响因子:
5
通讯作者:
毛相朝
毛相朝
中科院分区:
工程技术2区
文献类型:
--
作者:
毛相朝

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以脱氧葡萄糖杆菌DSM 2003的无细胞提取物为原料,以麦芽糖糊精为原料合成了一种新型水溶性葡聚糖。采用粒径排除色谱法纯化葡聚糖,采用傅里叶变换红外光谱、核磁共振和气相色谱-质谱联用仪测定葡聚糖的结构。根据光谱数据,我们发现葡聚糖只含有d-葡萄糖残基。通过甲基化分析,估计非还原性末端葡萄糖吡诺基(Glcp)与6-链Glcp和4,6-链Glcp的比例为8.62:78:79:12.59。这表明在α(1,6)葡萄糖基线性链中存在少量的α(1,4)分支。本文报道了一种新型右旋糖酐的合成方法。
A novel water-soluble dextran was synthesized from maltodextrin by cell-free extract of Gluconobacter oxydans DSM 2003. The dextran was purified by size exclusion chromatography, and the structure was determined by Fourier transform infrared spectroscopy, nuclear magnetic resonance, and gas chromatography–mass spectrometer. Based on the spectral data, we found that the dextran contained only d-glucose residues. The ratio of nonreducing end glucopyranosyl (Glcp) to 6-linked Glcp to 4,6-linked Glcp was estimated to be 8.62:78.79:12.59 by methylation analysis. This result indicated the existence of a small proportion of α(1,4) branches in α(1,6) glucosyl linear chains. Here, we reported the first time a novel dextran was synthesized by G. oxydans DSM 2003.
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发表时间: 2001-08-03
影响因子: 3.1
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