Portal de Periódicos da CAPES

Inositol 1,3,4,5-tetrakisphosphate causes release of Ca2+ from permeabilized mouse lymphoma L1210 cells by its conversion into inositol 1,4,5-trisphosphate

1989; Portland Press; Volume: 259; Issue: 3 Linguagem: Inglês

10.1042/bj2590931

1470-8728

Peter J. Cullen, Robin F. Irvine, Bjørn K. Drøbak, A P Dawson,

Protein Tyrosine Phosphatases

Addition of Ins(1,3,4,5)P4 at micromolar concentrations causes release of Ca2+ from electroporated L1210 cells, but not from digitonin-permeabilized cells. This was shown to be due to its conversion into Ins(1,4,5)P3, because only the electroporated cells convert Ins(1,3,4,5)P4 into Ins(1,4,5)P3. Thus electroporation appears to activate or expose an Ins(1,3,4,5)P4 3-phosphatase.