What does the slo operon encode?

What does the slo operon encode?

• A. SOD
• B. Catalase
• C. Manganese transporters
• D. Ribosomal proteins

Answer: (C)

Metal ions are essential cofactors for many bacterial enzymes, and cells must have reliable systems to take them up from the environment. The slo operon encodes a manganese (Mn2+) uptake system, comprising components that import Mn2+ into the cell. Mn is a key cofactor for several enzymes, and having a dedicated transporter helps the cell maintain enough Mn for these functions and for defense against oxidative stress. So the operon’s products are transport proteins that bring Mn into the cell, not the enzymes that use Mn. That’s why manganese transporters is the correct choice. In contrast, enzymes like superoxide dismutase or catalase are distinct proteins that detoxify reactive oxygen species, and ribosomal proteins are unrelated to metal transport.

Metal ions are essential cofactors for many bacterial enzymes, and cells must have reliable systems to take them up from the environment. The slo operon encodes a manganese (Mn2+) uptake system, comprising components that import Mn2+ into the cell. Mn is a key cofactor for several enzymes, and having a dedicated transporter helps the cell maintain enough Mn for these functions and for defense against oxidative stress. So the operon’s products are transport proteins that bring Mn into the cell, not the enzymes that use Mn. That’s why manganese transporters is the correct choice. In contrast, enzymes like superoxide dismutase or catalase are distinct proteins that detoxify reactive oxygen species, and ribosomal proteins are unrelated to metal transport.