ExplorEnz: EC 3.1.3.56

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3.1.3.56

Accepted name:

inositol-polyphosphate 5-phosphatase

Reaction:

(1) D-myo-inositol 1,4,5-trisphosphate + H₂O = myo-inositol 1,4-bisphosphate + phosphate
(2) 1D-myo-inositol 1,3,4,5-tetrakisphosphate + H₂O = 1D-myo-inositol 1,3,4-trisphosphate + phosphate

For diagram of myo-inositol-phosphate biosynthesis, click here

Other name(s):

type I inositol-polyphosphate phosphatase; inositol trisphosphate phosphomonoesterase; InsP₃/Ins(1,3,4,5)P₄ 5-phosphatase; inosine triphosphatase; D-myo-inositol 1,4,5-triphosphate 5-phosphatase; D-myo-inositol 1,4,5-trisphosphate 5-phosphatase; L-myo-inositol 1,4,5-trisphosphate-monoesterase; inositol phosphate 5-phosphomonoesterase; inositol-1,4,5-trisphosphate/1,3,4,5-tetrakisphosphate 5-phosphatase; Ins(1,4,5)P₃ 5-phosphatase; D-myo-inositol(1,4,5)/(1,3,4,5)-polyphosphate 5-phosphatase; inositol 1,4,5-trisphosphate phosphatase; inositol polyphosphate-5-phosphatase; myo-inositol-1,4,5-trisphosphate 5-phosphatase; inositol-1,4,5-trisphosphate 5-phosphatase

Systematic name:

1D-myo-inositol-1,4,5-trisphosphate 5-phosphohydrolase

Comments:

One mammalian isoform is known. This enzyme is distinguished from the family of enzymes classified under EC 3.1.3.36, phosphoinositide 5-phosphatase, by its inability to dephosphorylate inositol lipids.

Links to other databases:

BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 106283-14-1

References:

1.	Downes, C.P., Mussat, M.C. and Michell, R.H. The inositol trisphosphate phosphomonoesterase of the human erythrocyte membrane. Biochem. J. 203 (1982) 169–177. [PMID: 6285891]
2.	Erneux, C., Lemos, M., Verjans, B., Vanderhaeghen, P., Delvaux, A. and Dumont, J.E. Soluble and particulate Ins(1,4,5)P₃/Ins(1,3,4,5)P₄ 5-phosphatase in bovine brain. Eur. J. Biochem. 181 (1989) 317–322. [DOI] [PMID: 2540972]
3.	Woscholski, R. and Parker, P.J. Inositol phosphatases: constructive destruction of phosphoinositides and inositol phosphates. In: Cockcroft, S. (Ed.), Biology of Phosphoinositides, Biology of Phosphoinositides, Oxford, 2000, pp. 320–338.
4.	Verjans, B., De Smedt, F., Lecocq, R., Vanweyenberg, V., Moreau, C. and Erneux, C. Cloning and expression in Escherichia coli of a dog thyroid cDNA encoding a novel inositol 1,4,5-trisphosphate 5-phosphatase. Biochem. J. 300 (1994) 85–90. [PMID: 8198557]

[EC 3.1.3.56 created 1989, modified 2002]