Target intelligence / Profile preview

Inositol polyphosphate-4-phosphatase type I A (INPP4A)

Target
INPP4A
Molecular classification
Enzyme, Phosphatase
01

Overview

Inositol polyphosphate-4-phosphatase type I A (INPP4A) is an Mg²⁺-independent enzyme that catalyzes the removal of the phosphate group from the 4-position of the inositol ring in phosphatidylinositol 3,4-bisphosphate and related substrates, antagonizing the PI3K-AKT/PKB signaling pathway. It plays an important modulatory role in cell cycle progression, cell survival, and neuronal functions, with disease relevance in neurodegeneration and cancer[1][2][3].

Other names
INPP4AInositol polyphosphate 4-phosphatase type IType I inositol 3,4-bisphosphate 4-phosphataseINPP4TVAS1Inositol polyphosphate-4-phosphatase, type I, 107kDaEC 3.1.3.66[1]
02

Mechanism of action

Hydrolysis of the 4-phosphate from phosphatidylinositol 3,4-bisphosphate, counteracting PI3K signaling, thereby negatively regulating Akt (protein kinase B) activity[1][2]

03

Biological functions

Signal transductionRegulation of the PI3K-AKT signaling pathwayModulation of cell cycle progression and cell survivalRegulation of synaptic localization of NMDA receptors
04

Disease associations

Neurodegenerative diseaseCancerOther (e.g., Dyskeratosis congenita)[1][2]
05

Safety considerations

Potential for neurodegeneration with loss-of-function mutationsPotential effects on cell survival and proliferation leading to tumorigenesis if dysregulated[2]

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