Abstract:
:Two-dimensional (2-D) polyacrylamide gel electrophoresis was used to detect proteins induced in Frankia sp. strain ACN14a-tsr by root exudates of its symbiotic host, Alnus glutinosa. The 5 most prominent proteins were purified from 2-D gels and characterized by N-terminal sequencing. All of these proteins had a high percentage of similarity with known stress proteins. One protein match was the Fe superoxide dismutase (Fe-SOD), another was a tellurite resistance protein (Ter), the third was a bacterioferritin comigratory protein (Bcp); and two matches, differing only by their isoelectric point, were the same small heat shock protein (Hsp), a major immune reactive protein found in mycobacteria. This suggests that the symbiotic microorganism Frankia, first responds with a normal stress response to toxic root products of its symbiotic host plant. To confirm its identity, the gene corresponding to the Fe-SOD protein, sodF was isolated from a genomic library by a PCR-approach and sequenced. It is the first stress response gene characterized in Frankia.
journal_name
Can J Microbioljournal_title
Canadian journal of microbiologyauthors
Hammad Y,Maréchal J,Cournoyer B,Normand P,Domenach AMdoi
10.1139/w01-046subject
Has Abstractpub_date
2001-06-01 00:00:00pages
541-7issue
6eissn
0008-4166issn
1480-3275journal_volume
47pub_type
杂志文章abstract::Subunits A and B of cholera enterotoxin were isolated by chromatography on a Bio-Gel P-60 column in the presence of 4% formic acid. The purity and biological activity of the isolated subunits was assessed by polyacrylamide disc gel electrophoresis and mouse adrenal cell assay, respectively. The specific uptake of isol...
journal_title:Canadian journal of microbiology
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journal_title:Canadian journal of microbiology
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journal_title:Canadian journal of microbiology
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更新日期:2001-05-01 00:00:00
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pub_type: 杂志文章
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更新日期:1982-11-01 00:00:00
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