Intrinsic inhibitor of inositol 1,4,5-trisphosphate binding

Masato Hirata, Masako Yoshida, Takashi Kanematsu, Hiroshi Takeuchi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Rat brain cytosol was applied to a heparin column and eluted with 0.9 M-NaCl. The total binding activity of [3H] inositol 1,4,5-trisphosphate to the eluate was increased about 6-fold compared with the original cytosol. When the eluate was mixed with a flow-through fraction from the heparin column, however, the activity returned to the original lever, suggesting that the flow-through fraction contained an inhibitory factor(s) which prevented the binding. The factor(s) was purified by sequential column chromatography using gel permeation, a hydrophobic gel, and finally, a hydroxylapatite gel. Silver staining of sodium dedecyl sulfate gel electrphoresis of the sample thus purified showed a broad band located between the authentic molecular weight markers of 580 and 390 k. A carbohydrate staining method showed that the factor is a glycoprotein.

Original languageEnglish
Pages (from-to)179-184
Number of pages6
JournalMolecular and cellular biochemistry
Issue number1-2
Publication statusPublished - 1999

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Clinical Biochemistry
  • Cell Biology


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