Bacillus amyloliquefaciens

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Bacillus amyloliquefaciens
Scientific classification
Kingdom: Bacteria
Phylum: Firmicutes
Class: Bacilli
Order: Bacillales
Family: Bacillaceae
Genus: Bacillus
Species: B. amyloliquefaciens
Binomial name
Bacillus amyloliquefaciens
Priest et al., 1987

Bacillus amyloliquefaciens is a species of bacterium in the genus Bacillus that is the source of the BamH1 restriction enzyme. It also synthesizes a natural antibiotic protein barnase, a widely studied ribonuclease that forms a famously tight complex with its intracellular inhibitor barstar, and plantazolicin, a suspected agent with activity against Bacillus anthracis.

Discovery and name[edit]

B. amyloliquefaciens was discovered in soil 1943 by a Japanese scientist named Fukumoto, who gave the bacterium its name because it produced (faciens) a liquifying (lique) amylase (amylo).


Alpha amylase from B. amyloliquefaciens is often used in starch hydrolysis. B. amyloliquefaciens is also a source of subtilisin, an enzyme that catalyzes the breakdown of proteins in a similar way to trypsin.

Status as a species[edit]

Between the 1940s and the 1980s, bacteriologists debated as to whether or not B. amyloliquefaciens was a separate species or a subspecies of Bacillus subtilis. The matter was settled in 1987, when a group of scientists, including Fergus G. Priest of Heriot-Watt University, established it as a separate species.

American Type Culture Collection[edit]

In the American Type Culture Collection the number for B. amyloliquefaciens is 23350.