Plant nucleotide cyclases: An increasingly complex and growing family

Stuart Meier, Cathal Seoighe, Lusisizwe Kwezi, Helen Irving, Chris Gehring*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Second messengers have a key role in linking environmental stimuli to physiological responses. One such messenger, cGMP, has long been known to be critical to many different processes in higher plants while guanylyl cyclases (GCs), enzymes that catalyse the formation of cGMP from GTP have largely remained elusive. This is somewhat surprising considering that the unicellular green alga Chlamydomonas reinhardtii contains >90 annotated GCs. We have recently shown (PLoS ONE 2(5): e449) that a recombinant cytoplasmic domain of the Arabidopsis brassinosteroid receptor AtBRI has GC activity in vitro. This finding may suggest that other leucine-rich receptor kinases such as the phystosulfokine receptor may also confer GC activity as it has a high degree of similarity in the domain that has been delineated as essential for catalysis. In addition, the discovery of increasing complexities in the molecular architecture of higher plant nucleotide cyclases (NCs) is entirely compatible with findings in Chlamydomonas where such domains appear in >20 different combinations suggesting a role in highly diverse and complex signaling events.

Original languageEnglish (US)
Pages (from-to)536-539
Number of pages4
JournalPlant Signaling and Behavior
Issue number6
StatePublished - 2007
Externally publishedYes


  • Arabidopsis thaliana
  • Chlamydomonas reinhardtii
  • Guanylyl cyclase
  • Nucleotide cyclase
  • Signal transduction
  • cGMP

ASJC Scopus subject areas

  • Plant Science


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