PDZ domain of trypsin-like serine proteases, such as DegP/HtrA, which are oligomeric proteins involved in heat-shock response, chaperone function, and apoptosis. May be responsible for substrate recognition and/or binding, as most PDZ domains bind C-terminal polypeptides, though binding to internal (non-C-terminal) polypeptides and even to lipids has been demonstrated. In this subfamily of protease-associated PDZ domains a C-terminal beta-strand forms the peptide-binding groove base, a circular permutation with respect to PDZ domains found in Eumetazoan signaling proteins.

Right handed beta helix region. This region contains a parallel beta helix region that shares some similarity with Pectate lyases.

PDZ domain, also called DHR (Dlg homologous region) or GLGF (after a conserved sequence motif). Many PDZ domains bind C-terminal polypeptides, though binding to internal (non-C-terminal) polypeptides and even to lipids has been demonstrated. Heterodimerization through PDZ-PDZ domain interactions adds to the domain's versatility, and PDZ domain-mediated interactions may be modulated dynamically through target phosphorylation. Some PDZ domains play a role in scaffolding supramolecular complexes. PDZ domains are found in diverse signaling proteins in bacteria, archebacteria, and eurkayotes. This CD contains two distinct structural subgroups with either a N- or C-terminal beta-strand forming the peptide-binding groove base. The circular permutation placing the strand on the N-terminus appears to be found in Eumetazoa only, while the C-terminal variant is found in all three kingdoms of life, and seems to co-occur with protease domains. PDZ domains have been named after PSD95(post synaptic density protein), DlgA (Drosophila disc large tumor suppressor), and ZO1, a mammalian tight junction protein.

PDZ domain. This entry represents the PDZ domain from a wide variety of proteins.

Right handed beta helix region. This region contains a parallel beta helix region that shares some similarity with Pectate lyases.

Glycosidehydrolase BT_1002 [Bacteroides thetaiotaomicron],5MQP_B Glycoside hydrolase BT_1002 [Bacteroides thetaiotaomicron],5MQP_C Glycoside hydrolase BT_1002 [Bacteroides thetaiotaomicron],5MQP_D Glycoside hydrolase BT_1002 [Bacteroides thetaiotaomicron],5MQP_E Glycoside hydrolase BT_1002 [Bacteroides thetaiotaomicron],5MQP_F Glycoside hydrolase BT_1002 [Bacteroides thetaiotaomicron],5MQP_G Glycoside hydrolase BT_1002 [Bacteroides thetaiotaomicron],5MQP_H Glycoside hydrolase BT_1002 [Bacteroides thetaiotaomicron]