Hypoxia Associated Proteolytic Processing of OS-9 by the Metalloproteinase Meprin β.

Meprin metalloproteases play a role in the pathology of ischemia/reperfusion- (IR-) induced renal injury. The endoplasmic reticulum-associated protein, osteosarcoma-9 (OS-9), has been shown to interact with the carboxyl-terminal tail of meprin β. More importantly, OS-9 interacts with the hypoxia inducible factor-1α (HIF-1α) and the prolyl-hydroxylase, proteins which mediate the cell's response to hypoxia.