Enzymes
| UniProtKB help_outline | 805 proteins |
| GO Molecular Function help_outline |
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- Name help_outline 1D-myo-inositol 3,4-bisphosphate Identifier CHEBI:83241 Charge -4 Formula C6H10O12P2 InChIKeyhelp_outline MCKAJXMRULSUKI-CNWJWELYSA-J SMILEShelp_outline O[C@H]1[C@H](O)[C@@H](O)[C@H](OP([O-])([O-])=O)[C@@H](OP([O-])([O-])=O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 2 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H2O Identifier CHEBI:15377 (CAS: 7732-18-5) help_outline Charge 0 Formula H2O InChIKeyhelp_outline XLYOFNOQVPJJNP-UHFFFAOYSA-N SMILEShelp_outline [H]O[H] 2D coordinates Mol file for the small molecule Search links Involved in 6,337 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline 1D-myo-inositol 3-phosphate Identifier CHEBI:58401 (Beilstein: 11180720) help_outline Charge -2 Formula C6H11O9P InChIKeyhelp_outline INAPMGSXUVUWAF-PTQMNWPWSA-L SMILEShelp_outline O[C@H]1[C@H](O)[C@H](O)[C@H](OP([O-])([O-])=O)[C@@H](O)[C@@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 11 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline phosphate Identifier CHEBI:43474 Charge -2 Formula HO4P InChIKeyhelp_outline NBIIXXVUZAFLBC-UHFFFAOYSA-L SMILEShelp_outline OP([O-])([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 1,020 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:43388 | RHEA:43389 | RHEA:43390 | RHEA:43391 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Publications
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The isolation and characterization of cDNA encoding human and rat brain inositol polyphosphate 4-phosphatase.
Norris F.A., Auethavekiat V., Majerus P.W.
Inositol polyphosphate 4-phosphatase, an enzyme of the inositol phosphate signaling pathway, catalyzes the hydrolysis of the 4-position phosphate of inositol 3,4-bisphosphate, inositol 1,3,4-trisphosphate, and phosphatidylinositol 3,4-bisphosphate. The amino acid sequences of tryptic and CNBr pept ... >> More
Inositol polyphosphate 4-phosphatase, an enzyme of the inositol phosphate signaling pathway, catalyzes the hydrolysis of the 4-position phosphate of inositol 3,4-bisphosphate, inositol 1,3,4-trisphosphate, and phosphatidylinositol 3,4-bisphosphate. The amino acid sequences of tryptic and CNBr peptides of the enzyme isolated from rat brain were determined. Degenerate oligonucleotide primers based on this sequence were used to amplify a 74-base pair polymerase chain reaction product. This product was used to isolate a 5607-base pair composite cDNA, which had an open reading frame encoding a protein with 939 amino acids with a predicted molecular mass of 105,588 Da. The rat brain polymerase chain reaction product was used as a probe to isolate a human brain cDNA that predicts a protein with 938 amino acids and a molecular mass of 105,710 Da. Remarkably, the human and rat proteins were 97% identical. Recombinant rat protein expressed in Escherichia coli catalyzed the hydrolysis of all three substrates of the 4-phosphatase. Northern blot hybridization indicates that the 4-phosphatase is widely expressed in rat tissues with the highest levels of expression occurring in brain, heart, and skeletal muscle. Polyclonal antiserum directed against the carboxyl terminus of the 4-phosphatase immunoprecipitated > 95% of the 4-phosphatase activity in crude homogenates of rat brain, heart, skeletal muscle, and spleen, suggesting that this enzyme accounts for the 4-phosphate activity present in rat tissues. This antiserum also immunoprecipitated the 4-phosphatase from human platelet sonicates. << Less
J. Biol. Chem. 270:16128-16133(1995) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.