The Pathway Ontology (PW), is currently being developed at the Rat Genome Database. For more information about this vocabulary, please see Petri et al. The rat genome database pathway portal. Database (Oxford). 2011 Apr 8;2011:bar010. Print 2011 or contact us (http://rgd.mcw.edu/contact/index.shtml).
Proteases, the vitamin K-dependent coagulation proteases in particular, can activate a specific class of G protein-coupled receptors harboring an internally tethered ligand. The four protease-activated receptors (PARs) are involved in numerous physiologically relevant processes and can also play a role in disease-related aspects. PARs can be cleaved at different sites by different proteases to elicit distinct signaling responses, referred to as biased signaling.