PIP5K1A Antibody

Signal Transduction

For WB starting dilution is: 1:1000

This antibody is prepared by Saturated Ammonium Sulfate (SAS) precipitation followed by dialysis

Rabbit Ig

Supplied in PBS with 0.09% (W/V) sodium azide.

Store at 4˚ C for three months and -20˚ C, stable for up to one year. As with all antibodies care should be taken to avoid repeated freeze thaw cycles. Antibodies should not be exposed to prolonged high temperatures.

None

Q99755

8394

PIP5K1A

Homo sapiens

Overexpression of phosphatidylinositol phosphate 5-kinase alpha (PIP5KIalpha), which synthesizes PIP2, suppresses apoptosis, whereas a kinase-deficient mutant does not. Protection by the wild-type PIP5KIalpha isaccompanied by decreases in the generation of activated caspases and of caspase 3-cleaved PARP. Protection is not mediated through PIP3 or Akt activation. An anti-apoptotic role for PIP(2) is substantiated by the finding that PIP5KIalpha is cleaved by caspase 3 during apoptosis, and cleavage inactivates PIP5KIalpha in vitro. Mutation of the P(4) position (D279A) of the PIP5KIalpha caspase 3 cleavage consensus prevents cleavage in vitro, and during apoptosis in vivo. Significantly, the caspase 3-resistant PIP5KIalpha mutant is more effective in suppressing apoptosis than the wild-type kinase. PIP2 is a direct regulator of apical and effector caspases in the death receptor and mitochondrial pathways, and PIP5KIalpha inactivation contributes to the progression of apoptosis.

Loijens, J.C., et al., J. Biol. Chem. 271(51):32937-32943 (1996).

Western blot analysis of PIP5K1A using rabbit polyclonal hPIP5K1A-R34 using 293 cell lysates (2 ug/lane) either nontransfected (Lane 1) or transiently transfected (Lane 2) with the PIP5K1A gene.