title: PTPL1: a large phosphatase with a split personality.
abstract: Protein tyrosine phosphatase, PTPL1, (also known as PTPN13, FAP-1, PTP-BAS, PTP1E) is a non-receptor type PTP and, at 270 kDa, is the largest phosphatase within this group. In addition to the well-conserved PTP domain, PTPL1 contains at least 7 putative macromolecular interaction domains. This structural complexity indicates that PTPL1 may modulate diverse cellular functions, perhaps exerting both positive and negative effects. In accordance with this idea, while certain studies suggest that PTPL1 can act as a tumor-promoting gene other experimental studies have suggested that PTPL1 may function as a tumor suppressor. The role of PTPL1 in the cancer cell is therefore likely to be both complex and context dependent with possible roles including the modulation of growth, stress-response, and cytoskeletal remodeling pathways. Understanding the nature of molecular complexes containing PTPL1, its interaction partners, substrates, regulation and subcellular localization are key to unraveling the complex personality of this protein phosphatase.
authors.affiliation: Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC 20057, USA.
authors.forename: Ogan D
authors.initials: OD
authors.lastname: Abaan
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: Toretsky
mesh_terms: D000818:Animals; D002471:Cell Transformation, Neoplastic; D006801:Humans; D015513:Oncogene Proteins / Q000502:physiology; D054595:Protein Tyrosine Phosphatase, Non-Receptor Type 13 / Q000502:physiology*; D025521:Tumor Suppressor Proteins / Q000502:physiology
chemical_list: D015513:Oncogene Proteins; D025521:Tumor Suppressor Proteins; C516742:PTPN13 protein, human; D054595:Protein Tyrosine Phosphatase, Non-Receptor Type 13