Abstract
The PYRIN domain (PYD) is a well known protein interaction module and a prime mediator of the protein interactions necessary for apoptosis, inflammation and innate immune signaling pathway. Because PYD-mediated apoptosis, inflammation and innate immune processes are associated with many human diseases, studies in these areas are of great biological importance. Intensive biochemical and structural studies of PYD have been conducted in the past decade to elucidate PYD-mediated signaling events, and evaluations of the molecular structure of PYDs have shown the underlying molecular basis for the assembly of PYD-mediated complexes and for the regulation of inflammation and innate immunity. This review summarizes the structure and function of various PYDs and proposes a PYD:PYD interaction for assembly of the complexes involved in those signaling pathways.
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