FEBS Letters
Volume 583, Issue 5 , Pages 921-926, 4 March 2009

SV channels dominate the vacuolar Ca2+ release during intracellular signaling

Edited by Julian Schroeder

  • Igor Pottosin

      Affiliations

    • Centro de Investigaciones Biomédicas, Universidad de Colima, Mexico
    • ,
  • Tim Wherrett

      Affiliations

    • School of Agricultural Science, University of Tasmania, College Rd, Private Bag 54, Hobart, Tas 7001, Australia
    • ,
  • Sergey Shabala

      Affiliations

    • School of Agricultural Science, University of Tasmania, College Rd, Private Bag 54, Hobart, Tas 7001, Australia
    • Corresponding Author InformationCorresponding author. Fax: +61 3 62622642.

Received 3 October 2008; received in revised form 3 February 2009; accepted 3 February 2009. published online 12 February 2009.

Abstract 

Vacuoles have long been suggested to mediate a rise in the cytosolic free Ca2+ during environmental signal transduction. This study addresses the issue of the control of vacuolar calcium release by some of the known signaling molecules such as IP3, cADPR, ABA, ATP, cAMP, cGMP, H2O2 and CaM. Over 30 concentrations and/or combinations of these signaling compounds were studied in a series of electrophysiological experiments involving non-invasive ion flux measurements (the MIFE) and patch-clamp techniques. Our results suggest that calcium, calmodulin and nucleotides cause calcium release via SV channels.

Keywords: Calcium, ATP, ABA, cADPR, Cyclic nucleotides, IP3, ROS, Second messenger, SV channel, Beta vulgaris

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PII: S0014-5793(09)00107-0

doi:10.1016/j.febslet.2009.02.009

FEBS Letters
Volume 583, Issue 5 , Pages 921-926, 4 March 2009

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