Nisin: GRAS Bacteriocin for Food Applications

This question asks to identify a bacteriocin recognized as GRAS (Generally Recognized As Safe) for use in specific food products.

Understanding Bacteriocins and GRAS Status

• Bacteriocins: These are antimicrobial peptides produced by bacteria, often targeting closely related bacterial species. They are explored as natural food preservatives.
• GRAS Status: This designation by the U.S. Food and Drug Administration (FDA) means that a substance is considered safe for its intended use in food based on a history of common use in food or on scientific evidence.

Evaluating Food Preservation Options

• Nisin: This is a bacteriocin produced by Lactococcus lactis. It is well-studied and widely used as a food preservative, particularly in dairy products, meats, and canned goods. Nisin has obtained GRAS status in many regions, including the US, for specific food applications.
• Trypsin: This is a protease enzyme derived from animal pancreas, primarily used in pharmaceuticals and research. It is not classified as a bacteriocin and does not have GRAS status for use as a food preservative.
• Pepsin: This is another protease enzyme, found in the digestive system of animals. Like trypsin, it's not a bacteriocin and isn't approved as a GRAS food preservative.
• Naturage: This term does not correspond to a known bacteriocin with established GRAS status for food use.

Based on scientific literature and regulatory approvals, Nisin is the bacteriocin that meets the specified criteria.

Conclusion: Nisin is the bacteriocin with GRAS status for use in specific foods.