Skip to main content

Function

Inositol 5-phosphatase which acts on inositol 1,4,5-trisphosphate, inositol 1,3,4,5-tetrakisphosphate, phosphatidylinositol 4,5-bisphosphate and phosphatidylinositol 3,4,5-trisphosphate (PubMed:10753883, PubMed:16824732). Has 6-fold higher affinity for phosphatidylinositol 4,5-bisphosphate than for inositol 1,4,5-trisphosphate (PubMed:10753883). Negatively regulates assembly of the actin cytoskeleton. Controls insulin-dependent glucose uptake among inositol 3,4,5-trisphosphate phosphatases; therefore, is the specific regulator for insulin signaling in skeletal muscle (By similarity).

Involvement in disease

Muscular dystrophy, congenital, with cataracts and intellectual disability

MDCCAID

An autosomal recessive form of muscular dystrophy with onset in early childhood and characterized by progressive muscle weakness. Almost all patients also have early-onset cataracts and intellectual disability of varying severity. Some patients have seizures.

None

The disease is caused by variants affecting the gene represented in this entry.

Sequence similarities

Belongs to the inositol 1,4,5-trisphosphate 5-phosphatase type II family.

Tissue specificity

Ubiquitously expressed with highest levels in skeletal muscle, heart and kidney.

Cellular localization

  • Endoplasmic reticulum
  • Cytoplasm
  • Following stimulation with EGF, translocates to membrane ruffles (PubMed:12536145, PubMed:26940976). Concentrated at the periphery of the nucleus (PubMed:10753883).

Alternative names

PPS, SKIP, INPP5K, Inositol polyphosphate 5-phosphatase K, Skeletal muscle and kidney-enriched inositol phosphatase

Target type

Proteins

Primary research area

Neuroscience

Molecular weight

51090Da

We found 3 products in 2 categories

Proteins & Peptides

Target

Species of origin

Cell Lines & Lysates

Target

Cell type

Species or organism