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Expression of a novel hyaluronidase from Streptococcus zooepidemicus in Escherichia coli and its application for the preparation of HA oligosaccharides

机译:一种新型的兽疫链球菌透明质酸酶在大肠杆菌中的表达及其在制备HA寡糖中的应用

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摘要

Hyaluronan (HA) oligosaccharides which can stimulate angiogenesis and suppress the growth of tumors have attracted more and more attention. In order to prepare pure and well-defined oligosaccharides from high-molecular-weight HA in a rapid and simple manner, an enzymatic degradation method was developed, which included degradation with a novel recombinant hyaluronan lyase (HA lyase, hyaluronidase, or HAase) and gel permeation chromatography. The HAase protein was expressed in Escherichia coli with the expression vector pBV220. The HAase was purified and refolded, and specific activity of the enzyme solution was 3800 U/mg. HA was degraded with HAase at the optimized conditions, yielding 46% and 31% of HA disaccharides and HA tetrasaccharides, respectively. These HA oligosaccharides were conveniently separated by consecutive column chromatography on Bio-gel P6 and were identified by HPLC-MS.
机译:能够刺激血管生成并抑制肿瘤生长的透明质酸(HA)寡糖已引起越来越多的关注。为了以快速,简便的方式从高分子量HA制备纯净和定义明确的寡糖,开发了一种酶促降解方法,包括用新型重组透明质酸裂解酶(HA裂解酶,透明质酸酶或HAase)降解,以及凝胶渗透色谱。 HAase蛋白用表达载体pBV220在大肠杆菌中表达。纯化并重新折叠HAase,酶溶液的比活为3800 U / mg。 HA在最适条件下用HAase降解,分别产生46%和31%的HA二糖和HA四糖。这些HA低聚糖可通过Bio-gel P6上的连续柱色谱法方便地分离,并通过HPLC-MS鉴定。

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