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PTPN3/PTPN4

  • Reference work entry
Encyclopedia of Signaling Molecules

  • 79 Accesses

Synonyms

PTPH1; PTPMEG/PTPMEG1

Historical Background

A common event in cellular signal transduction pathways is the phosphorylation of proteins on tyrosine residues. Tyrosine phosphorylation is reversible. The forward reaction is mediated by protein tyrosine kinases. By contrast, the reverse reaction is performed by protein tyrosine phosphatases (PTP). The PTP family consists of 107 genes whose protein products are diverse in form and specificity (Alonso et al. 2004). PTPN3 and PTPN4 constitute two members of this family that were initially identified by PCR amplification using primers specific to conserved regions of the catalytic domain of canonical PTP. PTPN3 was initially cloned from a HeLa cell cDNA library, whereas PTPN4 was cloned from a megakaryoblastic cell line, (Gu et al. 1991; Yang and Tonks 1991). PTPN3 and PTPN4 are 50% identical and 67% homologous at the amino acid level.

Structure and Expression Studies

PTPN3 and PTPN4 are cytosolic proteins that localize to the plasma...

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References

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Author information

Authors and Affiliations

  1. Laboratory of Intracellular Parasites, Rocky Mountain Laboratories, NIAID, NIH, Hamilton, MT, USA

    Dr. Timothy J. Bauler

  2. Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA

    Prof. Philip D. King

Authors
  1. Dr. Timothy J. Bauler
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  2. Prof. Philip D. King
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Corresponding author

Correspondence to Philip D. King .

Editor information

Editors and Affiliations

  1. Department of Molecular Science and Technology, Ajou University, Suwon, Korea

    Sangdun Choi

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© 2012 Springer Science+Business Media, LLC

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Bauler, T.J., King, P.D. (2012). PTPN3/PTPN4. In: Choi, S. (eds) Encyclopedia of Signaling Molecules. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-0461-4_535

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