Psychrobacter proteolyticus is a species of bacteria first isolated from the Antarctic krill Euphausia superba.

It excretes a cold-adapted metalloprotease.

[3] It is a strictly aerobic, strongly oxidase-positive, psychrotrophic, halotolerant, Gram-negative nonmotile coccobacillus; its type strain is CIP106830T (=DSM13887).

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