Tag: Bacillus
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Subtilisin
Subtilisin is a protease (a protein-digesting enzyme) initially obtained from Bacillus subtilis. Subtilisins belong to subtilases, a group of serine proteases that – like all serine proteases – initiate the nucleophilic attack on the peptide (amide) bond through a serine residue at the active site. Subtilisins typically have molecular weights 27kDa. They can be obtained from certain types of soil bacteria, for example, Bacillus amyloliquefaciens from which they are secreted in large amounts. Nomenclature “Subtilisin”…
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Bacillus thuringiensis: the James Bond of biological pest control
In the microscopic world of bacteria, Bacillus thuringiensis (Bt), a gram-positive, soil-dwelling microbe is the go-to secret agent for farmers and gardeners worldwide, thanks to its uncanny ability to produce crystal-clear killers. From Silkworms to Superbugs Our story begins in 1902 when Japanese sericultural engineer Ishiwatari Shigetane stumbled upon a mysterious ailment causing silkworms to…
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