Fig. 1
From: Bacterial serine protease HtrA as a promising new target for antimicrobial therapy?
Domain structure of HtrA proteins in Gram-negative bacteria. Monomeric DegP and DegQ proteins harbor an N-terminal signal peptide (SP), an ATP-independent trypsin-like protease domain followed by two PDZ domains. Many DegS proteins are composed of a transmembrane domain (TMD), protease domain and one PDZ domain