A novel extracellular proteinase from Bacillus pumilus

Area of Science:

• Microbiology
• Enzymology
• Biochemistry

Background:

• Bacillus pumilus is known to produce various enzymes.
• Extracellular alkaline proteinases are valuable in industrial applications.

Purpose of the Study:

• To characterize a novel alkaline proteinase produced by Bacillus pumilus NCTC AII6/73.
• To determine the biochemical properties of the purified enzyme.

Main Methods:

• Enzyme purification using ion-exchange chromatography (DEAE-cellulose).
• Protein separation and molecular weight determination via polyacrylamide-sodium dodecyl sulfate (SDS) gel electrophoresis.

Main Results:

• A novel extracellular alkaline proteinase was identified.
• The enzyme exhibited optimal activity at pH 9.5.
• Purification yielded two protein bands with molecular weights of approximately 15.6 x 10^3 daltons.
• The proteinase contained a high content of glycine and proline (around 50% of total amino acid residues).

Conclusions:

• Bacillus pumilus NCTC AII6/73 produces a unique alkaline proteinase.
• The enzyme's characteristics suggest potential for biotechnological applications.
• The high glycine and proline content may influence the protein's stability and function.