Type II Secretion system is common in bacteria which are

Type II Secretion system is common in bacteria that are Gram negative.
The type 2 secretion system is a type of protein secretion machinery found in various species of Gram-negative bacteria, including many human pathogens such as Pseudomonas aeruginosa and Vibrio cholerae.
The type II secretion system enables the transport of cytoplasmic proteins across the lipid bilayers that make up the cell membranes of Gram-negative bacteria.
Many Gram-negative bacteria use the type II secretion system to translocate folded proteins from the periplasm, through the outer membrane, into the extracellular milieu.