E. coli K5 fermentation and the preparation of heparosan, a bioengineered heparin precursor.

E. coli K5 fermentation and the preparation of heparosan, a bioengineered heparin precursor.
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DOI:
10.1002/bit.22898
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发表时间:
2010-12-15
影响因子:
3.8
通讯作者:
Linhardt, Robert J.
Linhardt, Robert J.
中科院分区:
工程技术2区
文献类型:
--
作者:
Wang, Zhenyu;Ly, Mellisa;Zhang, Fuming;Zhong, Weihong;Suen, Amy;Hickey, Anne Marie;Dordick, Jonathan S.;Linhardt, Robert J.

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Heparosan 是一种酸性多糖天然产物,是肝素生物合成和生物工程肝素化学酶法合成的关键前体。 Heparosan 也是大肠杆菌 K5 菌株的荚膜多糖。目前的研究重点是检查大肠杆菌 K5 的发酵情况,目标是高产量和高容量地生产乙酰肝素。使用聚丙烯酰胺凝胶电泳和傅里叶变换质谱法测定了这种细菌类肝素的结构和分子量特性。使用指数补料分批添加葡萄糖并富氧,在确定成分培养基中发酵大肠杆菌K5,得到15g/L的乙酰肝素,其数均分子量为58,000Da,重均分子量为84,000Da。
Heparosan is an acidic polysaccharide natural product, which serves as the critical precursor in heparin biosynthesis and in the chemoenzymatic synthesis of bioengineered heparin. Heparosan is also the capsular polysaccharide of Escherichia coli K5 strain. The current study was focused on the examination of the fermentation of E. coli K5 with the goal of producing heparosan in high yield and volumetric productivity. The structure and molecular weight properties of this bacterial heparosan were determined using polyacrylamide gel electrophoresis and Fourier transform-mass spectrometry. Fermentation of E. coli K5 in a defined medium using exponential fed batch glucose addition with oxygen enrichment afforded heparosan at 15 g/L having a number average molecular weight of 58,000 Da and a weight average molecular weight of 84,000 Da.
DOI: 10.1016/j.cbpa.2009.08.017
发表时间: 2009-12
影响因子: 7.8
作者:
Laremore, Tatiana N.;Zhang, Fuming;Dordick, Jonathan S.;Liu, Jian;Linhardt, Robert J.
通讯作者: Linhardt, Robert J.
DOI: 10.1007/s00216-010-3679-7
发表时间: 2011-01
影响因子: 4.3
作者:
Ly, Mellisa;Wang, Zhenyu;Laremore, Tatiana N.;Zhang, Fuming;Zhong, Weihong;Pu, Dennis;Zagorevski, Dmitri V.;Dordick, Jonathan S.;Linhardt, Robert J.
通讯作者: Linhardt, Robert J.
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发表时间: 2009-10-06
影响因子: 11.1
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DOI: 10.1016/0003-2697(62)90095-7
发表时间: 1962-01-01
影响因子: 2.9
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DOI: 10.1038/nbt1407
发表时间: 2008-06-01
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