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ID 48579
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Title Alternative
Study for the structures of the HA complexes produced by Clostridium botulinum type A mutant strain
Author
Ma, Shaobo
Abstract
Clostridium botulinum produces seven neurotoxin (NTX) serotypes, classified from as A to G. In culture, NTX forms protein complexes by association with non-toxic components, such as nontoxic-nonhemagglutinin (NTNH) and hemagglutinins (HA1, HA2, HA3). C. botulinum serotype A produces three types of toxin complexes, M-toxin (NTX and NTNH), L-toxin (M-toxin and HAs) and LL-toxin (dimer of L-toxin). In this study, I found three HA complexes in the culture of a nontoxigenic mutant serotype A lacking ntx and ntnh expression. The HA complexes displayed similar banding patterns on SDS-PAGE, but the staining intensities of the HA1 and HA2 bands were different. In addition, their native-PAGE banding profiles exhibited different behaviors. The large-molecular-size HA complex showed the highest activity, similar to that of an L-toxin. Based on the combined results of the PAGE and gel-filtration profiles, the differences in molecular size among the three HA complexes were thought to be caused by different numbers of HA1 and HA2 molecules. This paper reports for the first time the purification and characterization of a native HA complex of serotype A, and suggests that the HA can form complex structures without NTX and NTNH. This may help in understanding the toxin complex assembly pathway.
Keywords
ボツリヌス毒素(botulinum toxin)
ボツリヌス菌(Clostridium botulinum)
血球凝集素(hemagglutinin)
タンパク質複合体構造(protein complex structure)
Note
原著(Original Paper)
Published Date
2012-08-01
Publication Title
岡山医学会雑誌
Publication Title Alternative
Journal of Okayama Medical Association
Volume
volume124
Issue
issue2
Publisher
岡山医学会
Publisher Alternative
Okayama Medical Association
Start Page
137
End Page
143
ISSN
0030-1558
NCID
AN00032489
Content Type
Journal Article
Related Url
http://www.okayama-u.ac.jp/user/oma/
http://ousar.lib.okayama-u.ac.jp/metadata/48452
language
日本語
Copyright Holders
Copyright (c) 2012 岡山医学会
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publisher
Refereed
True
DOI
Eprints Journal Name
joma