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Identification of Post-translational Modifications of Plant Protein Complexes
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Calcium-dependent protein kinases in plants: evolution, expression and function.

Gardette R Valmonte1, Kieren Arthur, Colleen M Higgins

  • 1Institute for Applied Ecology New Zealand, School of Applied Sciences, Auckland University of Technology, New Zealand.

Plant & Cell Physiology
|December 24, 2013
PubMed
Summary
This summary is machine-generated.

Calcium-dependent protein kinases (CPKs) diversified into four groups during plant evolution, coinciding with the move to land. Despite gene family expansion, conserved sequences challenge the identification of functional CPK orthologs.

Keywords:
Calcium signalingCalcium-dependent protein kinaseGene family evolutionPlant developmentPlant stress

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Area of Science:

  • Plant molecular biology
  • Evolutionary biology
  • Biochemistry

Background:

  • Calcium-dependent protein kinases (CPKs) are crucial plant proteins regulating metabolism, stress responses, and hormone signaling.
  • CPKs are widespread in plants, algae, and protists but absent in animals and fungi.
  • A comprehensive evolutionary analysis of CPKs across diverse plant lineages was lacking.

Purpose of the Study:

  • To investigate the evolutionary history of CPKs from green algae to higher plants.
  • To analyze the functional diversification of CPKs throughout plant evolution.
  • To understand the relationship between CPK evolution and plant terrestrialization.

Main Methods:

  • Broadly sampled phylogenetic analysis of CPK sequences.
  • Comparative genomics and sequence conservation analysis.
  • Expression and functional studies in various plant species.

Main Results:

  • CPK gene family diversified into four major groups during the terrestrial transition of plants.
  • Significant expansion of the CPK gene family occurred from algae to higher plants.
  • High sequence conservation among CPKs across species was observed, despite evolutionary diversification.

Conclusions:

  • CPK evolution is closely linked to the adaptation of plants to terrestrial environments.
  • Sequence conservation complicates the identification of functionally equivalent CPKs (orthologs) across different plant species.
  • Further research is needed to elucidate CPK functional orthologs and their specific roles in plant development and stress response.