ASK1, also known as MEKK5 or MAPKKK5, activates MKK3, MKK4 (SEK1), and MKK6. Over-expression of ASK1 induces apoptotic cell death and is activated in cells treated with tumor necrosis factor alpha (TNFa). ASK1 interacts with members of the TRAF family and is activated by TRAF2 in the TNF-signaling pathway. After activation by TRAF2, ASK1 activates MKK4, which in turn activates JNK. Thus, ASK1 is a mediator of TRAF2-induced JNK activation. Recombinant protein corresponding to aa649-946 with an N-Terminal GST Tag from human ASK1, expressed in baculovirus in Sf9 insect cells. Accession: NM_005923. Activity: The specific activity of ASK1 was determined to be 96nmol/min/mg using a myelin basic protein (MBP) substrate. Storage and Stability: Aliquot to avoid repeated freezing and thawing and store at -70C. Aliquots are stable for 6 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
