The Role of ExPortal in Streptococci is To

Question

The role of ExPortal in Streptococci is to
A) serve as a secretion system and a chaperone.
B) mark proteins for destruction.
C) secrete proteins to the periplasm.
D) anchor proteins in the cytoplasmic membrane.
E) form -S-S- bonds needed for protein structure.

Accepted Answer

ExPortal is a type VII protein secretion system found in Streptococci that serves as a secretion system for various proteins, including virulence factors and enzymes. It also acts as a chaperone, helping to fold and stabilize these proteins before secretion. Therefore, choice A is the best answer. Choices B, C, D, and E do not accurately describe the role of ExPortal in Streptococci.