Stressing the role of MAP kinases in mitogenic stimulation

László Bögre*, Irute Meskiene, Erwin Heberle-Bors, Heribert Hirt

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

In yeast and animal cells, distinct subfamilies of mitogen-activated protein kinases (MAPKs) have evolved for transmitting different types of signals, such as the extracellular signal-regulated kinase (ERK) for mitogenic stimuli and differentiation, p38 and JUN kinase (JNK) for stress factors. Based on sequence analysis, the presently known plant MAPKs are most similar to ERKs, even though compelling evidence implies a role in various forms of biotic and abiotic stress responses. However, knowledge of their involvement in controlling proliferation is just emerging. A subgroup of the plant MAPKs, containing the alfalfa MMK3 and tobacco NTF6, are only active in mitotic cells and their localisation to the cell plate suggests a role in cytokinesis. An upstream regulator of MAPKs, the tobacco NPK1, appears to be also activated during mitosis. NPK1 might be associated and regulated by a microtubule motor protein. The localisation of NPK1 to the cell plate and its mitosis-specific activation suggest that together with NTF6 it could constitute a mitotic MAPK signalling module in tobacco. NPK1 appears to have a second role in repression of auxin-induced gene expression. MAPKs might also be involved in signalling within the meristems as suggested by the recruitement of a small G-protein to the CLAVATA 1 receptor-like protein kinase upon activation. In animal and yeast cells some of the small G-proteins relay signals from receptors to MAPK pathways.

Original languageEnglish (US)
Pages (from-to)705-718
Number of pages14
JournalPlant Molecular Biology
Volume43
Issue number5-6
StatePublished - Nov 23 2000

Keywords

  • Auxin
  • Cell cycle
  • Hormones
  • MAP kinase
  • Mitosis
  • Signal transduction

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Plant Science

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