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Prokaryotic calmodulins: recent developments and evolutionary implications.

K Yang1

  • 1School of CTI, Depaul University, Chicago, IL 60604, USA.

Journal of Molecular Microbiology and Biotechnology
|May 22, 2001
PubMed
Summary
This summary is machine-generated.

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Calcium ions (Ca2+) regulate cell processes via calmodulin superfamily proteins. This study proposes these calcium-binding proteins originated in Gram-positive bacteria before transferring to eukaryotes.

Area of Science:

  • Molecular Biology
  • Cellular Biology
  • Evolutionary Biology

Background:

  • Calcium ions (Ca2+) are crucial intracellular second messengers in eukaryotic cells.
  • Calcium-binding proteins, particularly those in the calmodulin superfamily, mediate many Ca2+ effects.
  • Understanding the evolutionary origins of these key regulatory proteins is important.

Purpose of the Study:

  • To propose an evolutionary origin for calcium-binding proteins.
  • To investigate the ancestral source of the calmodulin superfamily in eukaryotes.

Main Methods:

  • Comparative genomics analysis (implied).
  • Phylogenetic analysis of calcium-binding protein families (implied).
  • Bioinformatic approaches to trace gene origins (implied).

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Main Results:

  • Evidence suggests calcium-binding proteins did not originate within eukaryotes.
  • The proposed origin for these proteins is within high G+C Gram-positive bacteria.
  • Eukaryotes likely acquired these bacterial calcium-binding proteins through horizontal gene transfer.

Conclusions:

  • Calcium-binding proteins, central to eukaryotic cell signaling, have a prokaryotic origin.
  • High G+C Gram-positive bacteria are the proposed ancestral source of these proteins.
  • Horizontal gene transfer played a role in the evolution of eukaryotic cellular regulation.