Are p27 and p21 cytoplasmic oncoproteins?

Cell Cycle. Nov-Dec 2002;1(6):391-3. doi: 10.4161/cc.1.6.262.

Abstract

By causing cytoplasmic mislocation of p27 and p21, the Akt oncogenic kinase functionally inactivates these nuclear tumor suppressor proteins. Is cytoplasmic localization of p27 and p21 simply equivalent to loss of their function or are new functions acquired in the cytoplasm? Indeed, several lines of evidence suggest that cytoplasmic p27 and p21 may be oncoproteins with antiapoptotic activities.

Publication types

  • Review

MeSH terms

  • Animals
  • Apoptosis / physiology
  • Cell Compartmentation / physiology*
  • Cell Cycle / physiology
  • Cell Cycle Proteins / genetics
  • Cell Cycle Proteins / metabolism*
  • Cell Nucleus / enzymology
  • Cell Transformation, Neoplastic / genetics
  • Cell Transformation, Neoplastic / metabolism*
  • Cyclin-Dependent Kinase Inhibitor p21
  • Cyclin-Dependent Kinase Inhibitor p27
  • Cyclins / genetics
  • Cyclins / metabolism*
  • Cytoplasm / enzymology*
  • Humans
  • Neoplasms / enzymology*
  • Neoplasms / genetics
  • Tumor Suppressor Proteins / genetics
  • Tumor Suppressor Proteins / metabolism*

Substances

  • CDKN1A protein, human
  • Cell Cycle Proteins
  • Cyclin-Dependent Kinase Inhibitor p21
  • Cyclins
  • Tumor Suppressor Proteins
  • Cyclin-Dependent Kinase Inhibitor p27