PAK-1,2,3 Antibody (Phospho-Thr402)

Polyclonal Antibody

Wet Ice

The antibody has been directly tested for reactivity in Western blots with rat tissue. It is anticipated that the antibody will react with bovine, canine, human and mouse based on the fact that these species have 100% homology with the amino acid sequence used as antigen.
Western blot of rat hippocampal lysate showing specific immunolabeling of the ~68k to ~70k PAK protein (Control). The phosphospecificity of this labeling is shown in the second lane (lambda-phosphatase: lambda -Ptase). The blot is identical to the control except that it was incubated in lambda -Ptase (1200 units for 30 min) before being exposed to the phospho-Thr402 PAK-1, 2, 3 antibody. The immunolabeling of PAK is completely eliminated by treatment with lambda -Ptase.

Liquid. 100 ul in 10 mM HEPES (pH 7.5), 150 mM NaCl, 100 ug per ml BSA and 50% glycerol. Adequate amount of material to conduct 10-mini Western Blots.

In mammals, there are several identified isoforms of p21-activated protein kinases or PAKs: alpha -PAK (also known as PAK-1) and beta -PAK (also known as PAK-3) are mostly brain-specific, while gamma -PAK (also known as PAK-2) is expressed ubiquitously (Jakobi et al., 2003). Mutations of the gene coding for PAK-3 are associated with X-linked mental retardation and recent work indicates that PAK-3 is a key regulator of synapse formation and plasticity in the hippocampus (Boda et al., 2004). PAK-3 is thought to play a key role in regulation of cell shape and motility as well as cell death (Jakobi et al., 2003; Walter et al., 1998). Autophosphorylation of Thr402 in the protein has been found to be essential for activation of PAK (Jakobi et al., 2000).

Serine/threonine-protein kinase PAK 1

Prepared from rabbit serum by affinity purification via sequential chromatography on phospho- and dephosphopeptide affinity columns.

Cow; Dog; Human; Mouse; Rat