Protein Domain : Type II secretion system protein GspM, periplasmic domain superfamily IPR023229

Type  Homologous_superfamily
Description  GspM is part of the inner membrane component of the type II secretion system (T2SS). It consists of a short cytosolic N-terminal domain, a transmembrane domain, and a C-terminal periplasmic domain. The precise function of this protein is unknown [ ]. However, though in Vibrio cholerae, the EpsM protein interacts with the EpsL protein, and also forms homodimers [].The periplasmic domain forms a sandwich consisting of two α-helices and a four-stranded antiparallel β-sheet [ ]. The overall fold is a circular permutation of the ferredoxin fold. In the dimer, a deep cleft with a polar rim and a hydrophobic bottom made by conserved residues is located between the monomers. This cleft contains an extra electron density suggesting that this region might serve as a binding site of an unknown ligand or part of a protein partner.
Short Name  T2SS_M_periplasmic_sf

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