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Identification of novel protein tyrosine phosphatases of hematopoietic cells by polymerase chain reaction amplification

Academic Article
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Overview

authors

  • Yi, T. L.
  • Cleveland, John
  • Ihle, J. N.

publication date

  • November 1991

journal

  • Blood  Journal

abstract

  • Polymerase chain reaction (PCR) conditions were used to amplify cDNAs that encode putative protein tyrosine phosphatases (PTPs) from a murine interleukin-3-dependent myeloid cell line. Primers for the reactions were based on conserved sequences of the catalytic domain that are shared among all known PTPs. Sequencing of 100 PCR-amplified cDNA clones identified seven different cDNA sequences. Two of these sequences were identical to the murine PTP genes Ly5/CD45/LCA and LRP/R-PTP-alpha. Two of the cDNA sequences were 95% identical to human PTP epsilon (HPTP epsilon) and rat brain PTP (PTP1B), respectively, and are likely to represent their murine homologs. Three of the cDNA sequences encoded novel potential PTPs. One of the putative PTPs was ubiquitously expressed while a second was predominantly expressed in brain, kidney, and liver and at much lower levels in a variety of other cell tkpes and tissues. The third novel putative phosphatase was expressed primarily in hematopoietic cells and tissues in a pattern that was comparable with Ly5/CD45/LCA. Further characterization of these novel PTPs will provide insights into the growth regulation of hematopoietic cells.

subject areas

  • Amino Acid Sequence
  • Animals
  • Brain
  • DNA
  • Fibroblasts
  • Gene Expression
  • Granulocytes
  • Humans
  • Interleukin-3
  • Kidney
  • Liver
  • Lymphocytes
  • Mice
  • Mice, Inbred BALB C
  • Molecular Sequence Data
  • Polymerase Chain Reaction
  • Protein Tyrosine Phosphatases
  • Sequence Homology, Nucleic Acid
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Identity

International Standard Serial Number (ISSN)

  • 0006-4971

PubMed ID

  • 1932742
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Additional Document Info

start page

  • 2222

end page

  • 2228

volume

  • 78

issue

  • 9

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