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首页> 外文期刊>The protein journal >Characterization of toxin complex produced by a unique strain of Clostridium botulinum serotype D 4947.
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Characterization of toxin complex produced by a unique strain of Clostridium botulinum serotype D 4947.

机译:独特的D 4947型肉毒梭菌菌株产生的毒素复合物的表征。

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摘要

A unique strain of Clostridium botulinum, serotype D 4947 (D-4947), produces a considerable amount of a 650 kDa toxin complex (L-TC) and a small amount of a 280 kDa M-TC, a 540 kDa TC, and a 610 kDa TC. The complexes are composed of only un-nicked components, including neurotoxin (NT), nontoxic nonhemagglutinin (NTNHA) and hemagglutinin subcomponents (HA-70, HA-33 and HA-17). Unlike other NTs from all serotype strains, separation of D-4947 NT from L-TC, except for M-TC, during chromatography required highly alkaline conditions around pH 8.8. The separated NT and NTNHA/HAs complex can be reconstituted to L-TC that is indistinguishable from the parent L-TC with respect to toxicity, hemagglutination activity and gel filtration profile. The isoelectric points of NT and NTNHA/HAs were close together depending on the number of HA-33/17 molecules. We have established a new method to separate the unique D-4947 NT from the complex, which will yield valuable information on structure of botulinum toxin.
机译:独特的肉毒梭菌菌株,血清型D 4947(D-4947),可产生大量的650 kDa毒素复合物(L-TC)和少量的280 kDa M-TC,540 kDa TC和610 kDa TC。该复合物仅由无缺口的成分组成,包括神经毒素(NT),无毒非血凝素(NTNHA)和血凝素亚成分(HA-70,HA-33和HA-17)。与来自所有血清型菌株的其他NT不同,在色谱过程中将D-4947 NT与L-TC分离(M-TC除外),需要在pH 8.8左右的强碱性条件下进行。分离的NT和NTNHA / HAs复合物可以重构为L-TC,其在毒性,血凝活性和凝胶过滤特性方面与母体L-TC没有区别。 NT和NTNHA / HA的等电点靠在一起,这取决于HA-33 / 17分子的数目。我们建立了一种新方法,将独特的D-4947 NT与复合物分离,这将产生有关肉毒毒素结构的有价值的信息。

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