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Regulation of Tyrosine Protein Phosphatases by Binding to Phospholipids and Covalent Modification

  • Hans Werner Hofer
  • Christine Stader
Conference paper
Part of the NATO ASI Series book series (volume 76)

Abstract

The regulation of the phosphorylation state of tyrosine residues in proteins is of pivotal importance for the transduction of growth factor signals, cellular growth and differentiation as well as for the suppression of tumour formation. Protein phosphatases are involved in these processes in a dual mode by regulating the activity of some serine/threonine- and tyrosine-specific protein kinases and by counteracting phosphorylation of proteins by tyrosine kinases. The majority of the tyrosine phosphatases so far identified exhibit sequence homology within their catalytic domains and can be attributed to two different subfamilies (reviewed in 1,2): The members of the receptor phosphatase subfamily contain a transmembrane domain and extracellular domains with similarities to cell adhesion molecules or immunoglobulins and (with one known exception) two catalytic domains (see Ref. 3). Most, if not all, members of this subfamily are integral membrane proteins. A second subfamily is formed by tyrosine phosphatases consisting of a single catalytic domain. Though they are not comprising a transmembrane sequence, they have nevertheless also been reported to associate with membranes or other particulate cellular compartments (4–6).

Keywords

Catalytic Domain Tyrosine Phosphatase Casein Kinase Integral Membrane Protein Growth Factor Signal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Abbreviations

PC

phosphatidyl choline

PE

phosphatidyl ethanolamine

PI

phosphatidyl inositol

PS

phosphatidyl serine

RCML

reduced carboxymethylated and maleylated lysozyme

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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • Hans Werner Hofer
    • 1
  • Christine Stader
    • 1
  1. 1.Faculty of BiologyUniversity of KonstanzKonstanzGermany

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