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PTP4A2

Function

Protein tyrosine phosphatase which stimulates progression from G1 into S phase during mitosis. Promotes tumors. Inhibits geranylgeranyl transferase type II activity by blocking the association between RABGGTA and RABGGTB.

Post-translational modifications

Farnesylated. Farnesylation is required for membrane targeting and for interaction with RABGGTB. Unfarnesylated forms are redirected to the nucleus and cytosol.

Sequence similarities

Belongs to the protein-tyrosine phosphatase family.

Tissue specificity

Ubiquitously expressed, with highest levels in skeletal muscle, heart and thymus. Overexpressed in prostate tumor tissue.

Cellular localization

  • Cell membrane
  • Early endosome
  • Cytoplasm

Alternative names

  • Protein tyrosine phosphatase type IVA 2
  • HU-PP-1
  • OV-1
  • PTP(CAAXII)
  • Protein-tyrosine phosphatase 4a2
  • Protein-tyrosine phosphatase of regenerating liver 2
  • PRL-2
  • PRL2
  • PTP4A2
  • PTPCAAX2
  • BM-008

Target type

Proteins

Molecular weight

19127Da