pfam05134: T2SSL (This model is not part of the current CDD release)
Type II secretion system (T2SS), protein L
This family consists of Type II secretion system protein L sequences from several Gram-negative (diderm) bacteria. The Type II secretion system, also called Secretion-dependent pathway (SDP), is responsible for extracellular secretion of a number of different proteins, including proteases and toxins. This pathway supports secretion of proteins across the cell envelope in two distinct steps, in which the second step, involving translocation through the outer membrane, is assisted by at least 13 different gene products. T2SL is predicted to contain a large cytoplasmic domain represented by this family and has been shown to interact with the autophosphorylating cytoplasmic membrane protein T2SE. It is thought that the tri-molecular complex of T2SL, T2SE (pfam00437) and T2SM (pfam04612) might be involved in regulating the opening and closing of the secretion pore and/or transducing energy to the site of outer membrane translocation.
Jiyao W et al.(2023). "The conserved domain database in 2023.",