The alkaline phosphatase from KB cells was purified, characterized, and compared to placental alkaline phosphatase, which it resembles immunologically. Two nonidentical nonomeric subunits of the KB phosphatase were found. The two subunits, which have apparent molecular weights of 64,000 and 72,000, can be separated on polyacrylamide gels containing sodium dodecyl sulfate. The Mr = 64,000 KB sub...

Addition of alkaline phosphatase to rat kidney cytosol diminishes the ability of the mineralocorticoid receptor (MR) to bind aldosterone in a time-, temperature- and concentration-dependent form. A variety of phosphatase inhibitors, including levamisole, are effective in preventing this inactivation. On the other hand, when the steroid-receptor complex is incubated in the presence of alkaline p...

Nicholls, D. P. and Davies, J. S. (1977). Thorax, 32, 472-477. Acid phosphatase activity in carcinoma of the bronchus. Two cases are presented in which an undifferentiated small-cell carcinoma of the bronchus was associated with a considerably raised serum tartrate-labile acid phosphatase concentration. In neither case was there any evidence of a carcinoma of the prostate which, with a few rare...

Background: The most frequent sites of metastases in prostatic carcinoma are bones. Bone scintigraphy is the diagnostic tool of first choice for staging bone metastases in cancer of the prostate. But this examination is expensive and time-consuming.Therefore we are looking especially for serum parameters like alkaline phosphatase, the isoenzyme of bone-specific alkaline phosphatase, and prostat...

The major secreted isoenzyme of human prostatic acid phosphatase (PAcP) (EC 3.1.3.2), which catalyses p-nitrophenyl phosphate (PNPP) hydrolysis at acid pH values, was found to have phosphotyrosyl protein phosphatase activity since it dephosphorylated three different phosphotyrosine-containing protein substrates. Several lines of evidence are presented to show that the phosphotyrosyl phosphatase...

The Src homology 2 containing inositol 5-phosphatase (SHIP2) is a large multidomain enzyme that catalyzes the dephosphorylation of phospholipid phosphatidylinositol 3,4,5-triphosphate (PI(3,4,5)P3) to form PI(3,4)P2. PI(3,4,5)P3 key lipid second messenger controlling recruitment signaling proteins plasma membrane, thereby regulating plethora cellular events, including proliferation, growth, apo...

Cancer cells often depend on microenvironment signals from molecules such as cytokines for proliferation and metabolic adaptations. PRL-3, a cytokine-induced oncogenic phosphatase, is highly expressed in multiple myeloma associated with poor outcome this cancer. We studied whether PRL-3 influences metabolism. Cells transduced to express had higher aerobic glycolytic rate, oxidative phosphorylat...