Purification and characterization of a gelatinolytic matrix metalloproteinase from the skeletal muscle of grass carp (Ctenopharyngodon idellus)

•A gelatinolytic proteinase was purified from grass carp muscle.•The purified proteinase was metalloproteinase according to its characters and PMF analysis.•The purified metalloproteinase could hydrolyse gelatin and type I collagen.