Unit

UNIT 29.3 Radioligand Binding Analysis as a Tool for Quality Control of GPCR Production for Structural Characterization: Adenosine A2aR as a Template for Study

  1. Shweta Singh1,
  2. Minghao Zhang1,
  3. Nicolas Bertheleme1,
  4. Elodie Kara2,
  5. Philip G. Strange2,
  6. Bernadette Byrne1

Published Online: 1 FEB 2012

DOI: 10.1002/0471140864.ps2903s67

Current Protocols in Protein Science

Current Protocols in Protein Science

How to Cite

Singh, S., Zhang, M., Bertheleme, N., Kara, E., Strange, P. G. and Byrne, B. 2012. Radioligand Binding Analysis as a Tool for Quality Control of GPCR Production for Structural Characterization: Adenosine A2aR as a Template for Study. Current Protocols in Protein Science. 29:29.3:29.3.1–29.3.22.

Author Information

  1. 1

    Membrane Protein Crystallography Group, Division of Molecular Biosciences, Imperial College London, London, United Kingdom

  2. 2

    School of Pharmacy, University of Reading, Whiteknights, Reading, United Kingdom

Publication History

  1. Published Online: 1 FEB 2012
  2. Published Print: FEB 2012

Abstract

Functional characterization of G protein–coupled receptors is essential to ascertain the suitability of a protein target for downstream studies and to help develop optimal expression and isolation procedures. Radioligand binding analysis is a well-established technique, which allows direct measurement of the amount of functional receptor in a sample. It can be readily applied to both membrane-bound and soluble receptor samples and is an ideal method for monitoring the amount of functional protein at each stage in the expression and isolation process. This unit presents protocols for the radioligand binding analysis of the human adenosine A2a receptor and provides examples of how these assays can be used at several stages to help optimize expression, solubilization, and isolation procedures.

Keywords:

  • G protein–coupled receptor;
  • adenosine A2aR;
  • saturation radioligand binding assay;
  • competitive radioligand binding assay;
  • dissociation constant;
  • specific activity