Immunoblot analysis of Bacillus subtilis cell extracts with polyclonal antibodies, raised against purified exocellular alpha-amylase, revealed one protein species of 82,000 Da. This protein was found even in cells in which the amyE gene, encoding exocellular alpha-amylase, was disrupted. Isolated from the membrane fraction, the 82,000-M(r) protein displayed an alpha-amylase activity in vitro.
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http://dx.doi.org/10.1128/jb.177.17.5148-5150.1995 | DOI Listing |
Food Chem
November 2024
Department of Biotechnology, Periyar University, Salem, Tamil Nadu 636011, India.
Bacillus stercoris PSSR12 (B. stercoris PE), an isolate from rice field soils, was identified via 16s rRNA sequencing. The synthesis of the inulin and inulin producing enzyme (IPE) in B.
View Article and Find Full Text PDFJ Microbiol Methods
August 2019
School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, Guangdong, China; Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology Guangzhou, Guangzhou 510006, Guangdong, China. Electronic address:
Aspergillus niger is an important industrial producer of enzymes due to its high capacity for producing exocellular secretory proteins. The CRISPR/Cas9 system has been developed as a genetic manipulation tool in A. niger.
View Article and Find Full Text PDFBiochim Biophys Acta
January 2004
Institut Jacques Monod, Laboratoire Génétique et Membranes, Centre National de la Recherche Scientifique-Universités Paris 6 et Paris 7, Tour 43-2, place Jussieu, 75251 Paris cedex 05, France.
We studied the interactions between conformers of exocellular alpha-amylase and small unilamellar vesicles (SUV) composed of the major membrane lipids of Bacillus subtilis under physiological conditions of pH, temperature and ionic strength. Using fluorescence spectroscopy, surface plasmon resonance (SPR) and phase separation, we show that the native alpha-amylase has no affinity for the SUV, whereas a partially folded form, displaying structural properties in common with the competent state for secretion, binds to the vesicles (KA approximately 10(5) M(-1)). This association prevented its subsequent folding.
View Article and Find Full Text PDFJ Bacteriol
March 1999
Laboratoire Génétique et Membranes, Institut Jacques Monod, CNRS-Universités Paris 6 et 7, 75251 Paris Cedex 05, France.
SecA, the translocation ATPase of the preprotein translocase, accounts for 0.25% of the total protein in a degU32(Hy) Bacillus subtilis strain in logarithmic phase. The SecA level remained constant irrespective of the demand for exoprotein production but dropped about 12-fold during the late stationary phase.
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