M3949-71A

MAP4K1, phosphorylated (Ser171) (Mitogen-activated Protein Kinase Kinase Kinase Kinase 1, MAPK/ERK Kinase Kinase Kinase 1, MEK Kinase Kinase 1, MEKKK 1, Hematopoietic Progenitor Kinase, HPK1)

Size

£696.00

SKU:: M3949-71A
Purity:: Purified by Protein A and peptide affinity chromatography.
Storage Conditions:: -20°C
Supplier:: United States Biological
Host:: Rabbit
Immunogen:: KLH-conjugated synthetic phosphopeptide mapping to a fragment of residues surrounding Ser171 of human MAP4K1, Swiss/UniProt Accession: #Q92918. Species Sequence Homology: mouse
Format:: Supplied as a liquid in PBS, 0.09% sodium azide.
Extra Details:: The c-Jun amino-terminal kinases (JNKs)/stress-activated protein kinases (SAPKs) play a crucial role in stress responses in mammalian cells. The mechanism underlying this pathway in the hematopoietic system is unclear, but it is a key in understanding the molecular basis of blood cell differentiation. We have cloned a novel protein kinase, termed hematopoietic progenitor kinase 1 (HPK1), that is expressed predominantly in hematopoietic cells, including early progenitor cells. HPK1 is related distantly to the p21(Cdc42/Rac1)-activated kinase (PAK) and yeast STE20 implicated in the mitogen-activated protein kinase (MAPK) cascade. Expression of HPK1 activates JNK1 specifically, and it elevates strongly AP-1-mediated transcriptional activity in vivo. HPK1 binds and phosphorylates MEKK1 directly, whereas JNK1 activation by HPK1 is inhibited by a dominant-negative MEKK1 or MKK4/SEK mutant. Interestingly, unlike PAK65, HPK1 does not contain the small GTPase Rac1/Cdc42-binding domain and does not bind to either Rac1 or Cdc42, suggesting that HPK1. activation is Rac1/Cdc42-independent. These results indicate that HPK1 is a novel functional activator of the JNK/SAPK signaling pathway. Applications: Suitable for use in ELISA and Dot Blot. Other applications not tested. Recommended Dilutions: Dot Blot: 1:500 Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

Shipping Conditions:: Blue Ice