Label-Free Determination of the Dissociation Constant of Small Molecule-Aptamer Interaction by Isothermal Titration Calorimetry

  • Marc Vogel
  • Beatrix SuessEmail author
Part of the Methods in Molecular Biology book series (MIMB, volume 1380)


Isothermal titration calorimetry (ITC) is a powerful label-free technique to determine the binding constant as well as thermodynamic parameters of a binding reaction and is therefore well suited for the analysis of small molecule—RNA aptamer interaction. We will introduce you to the method and present a protocol for sample preparation and the calorimetric measurement. A detailed note section will point out useful tips and pitfalls.

Key words

RNA Aptamer Small molecule ITC Kd In vitro transcription 



This work was supported by the Deutsche Forschungsgemeinschaft (SFB902 A2) and EU FP7-KBBE-2013-7 no. 613745, Promys. We thank Katharina Keim for critical reading the manuscript.


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Department of BiologyTechnical University DarmstadtDarmstadtGermany

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