Phytochelatins as a Dynamic System for Cd(II) Buffering from the Micro- to Femtomolar Range
Joanna Wątły, Marek Łuczkowski, Michał Padjasek, Artur Krężel
Abstract
= 13.39) and additional chain elongation does not increase the stability significantly. Data show that PCs form an efficient system which buffers free Cd(II) ions in the pico- to femtomolar range under cellular conditions, avoiding significant interference with Zn(II) complexes. Our study confirms that the favorable entropy change is the factor governing the elevation of phytochelatins' stability and illuminates the importance of the chelate effect in shifting the free Gibbs energy.
Topics & Concepts
ChemistryPhytochelatinPotentiometric titrationChelationGibbs free energyMetalGlutathioneStability constants of complexesChemical stabilityEnthalpyMetal ions in aqueous solutionStereochemistryCrystallographyInorganic chemistryIonBiochemistryEnzymeOrganic chemistryThermodynamicsPhysicsPlant Stress Responses and TolerancePhotosynthetic Processes and MechanismsSpectroscopy and Quantum Chemical Studies