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Regulating Pathways of Bacillus pumilus Adamalysin-like Metalloendopeptidase Expression
Natalia L Rudakova1, Albina R Sabirova1, Damir I Khasanov1
1Institute of Fundamental Medicine, Kazan Federal University, Kremlevskaya St. 18, 420008 Kazan, Russia.
Abstract:
The minor secreted proteinase of B. pumilus 3-19 MprBp classified as the unique bacillary adamalysin-like enzyme of the metzincin clan. The functional role of this metalloproteinase in the bacilli cells is not clear. Analysis of the regulatory region of the mprBp gene showed the presence of potential binding sites to the transcription regulatory factors Spo0A (sporulation) and DegU (biodegradation). The study of mprBp activity in mutant strains of B. subtilis defective in regulatory proteins of the Spo- and Deg-systems showed that the mprBp gene is partially controlled by the Deg-system of signal transduction and independent from the Spo-system.
Insights
The bacillary adamalysin-like enzyme MprBp in B. pumilus is regulated by the Deg-system signal transduction pathway. Its role remains unclear, but it is independent of the Spo-system.
Area of Science:
- Microbiology
- Enzymology
- Molecular Biology
Background:
- Bacillus pumilus secretes a unique metalloproteinase, MprBp, belonging to the metzincin clan.
- The precise functional significance of MprBp within Bacillus cells is currently unknown.
- The mprBp gene's regulatory region contains putative binding sites for transcription factors Spo0A and DegU.
Purpose of the Study:
- To investigate the regulatory mechanisms controlling the expression of the mprBp gene.
- To elucidate the role of Spo0A and DegU in the regulation of MprBp activity.
Main Methods:
- Bioinformatic analysis of the mprBp gene's regulatory region for transcription factor binding sites.
- Experimental analysis of mprBp gene expression and protein activity in Bacillus subtilis mutant strains.
- Utilized strains deficient in key regulatory proteins of the Spo- and Deg-systems.
Main Results:
- The mprBp gene exhibits partial regulation by the Deg-system of signal transduction.
- MprBp gene expression and activity were found to be independent of the Spo-system.
- Spo0A and DegU binding sites were identified, suggesting their potential involvement in regulation.
Conclusions:
- The Deg-system plays a partial role in the regulation of the bacillary adamalysin-like enzyme MprBp.
- The Spo-system does not appear to directly regulate mprBp.
- Further research is needed to fully understand the functional role of MprBp in Bacillus species.
