Domain

Tensin phosphatase, lipid phosphatase domain (IPR029023)

Short name: Tensin_lipid_phosphatase_dom

Domain relationships

Description

Tensins constitute an eukaryotic family of lipid phosphatases that are defined by the presence of two adjacent domains: a lipid phosphatase domain and a C2-like domain. In the tumour suppressor protein PTEN, the best characterised member of the family, the lipid phosphatase domain was shown to specifically dephosphorylate the D3 position of the inositol ring of the lipid second messenger, phosphatydilinositol-3-4-5-triphosphate (PIP3). The lipid phosphatase domain contains the signature motif HCXXGXXR present in the active sites of protein tyrosine phosphatases (PTPs) and dual specificity phosphatases (DSPs). Furthermore, two invariant lysines are found only in the tensin-type phosphatase motif (HCKXGKXR) and are suspected to interact with the phosphate group at position D1 and D5 of the inositol ring [PMID: 1, PMID: 3].

The lipid phosphatase domain has a structure similar to the dual specificity phosphatase (see IPR000387).

Proteins known to contain this domain are listed below:

  • Tensin, a focal-adhesion molecule that binds to actin filaments. It may be involved in cell migration, cartilage development and in linking signal transduction pathways to the cytoskeleton.
  • Phosphatase and tensin homologue deleted on chromosome 10 protein (PTEN). It antagonizes PI 3-kinase signalling by dephosphorylating the 3-position of the inositol ring of PI(3,4,5)P3 and thus inactivates downstream signalling. It plays major roles both during development and in the adult to control cell size, growth, and survival.
  • Cyclin G-associated kinase or auxilin-2. It is a potential regulator of clathrin-mediated membrane trafficking.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.
PROSITE profiles