Semin Cell Biol 1993 Dec 01;46:379-87. doi: 10.1006/scel.1993.1045.

Structural diversity of eukaryotic protein tyrosine phosphatases: functional and evolutionary implications.

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In the past few years, very rapid advances have been made in determining the primary structure of protein tyrosine phosphatases (PTPases). PTPase genes have now been isolated from bacteria, viruses, yeasts and insects as well as vertebrates. The cytosolic PTPases have a catalytic domain associated with various accessory domains that are believed to be involved in protein-protein interaction or subcellular localization. The transmembrane PTPases have either one or two cytoplasmic PTPase domains and an extracellular receptor-like structure. The existence of a large number of structurally diverse PTPases suggests that they play specific and crucial roles in signal transduction. In this article, the structural features of the PTPases from higher eukaryotes are reviewed.

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