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Protein Purification-free Method of Binding Affinity Determination by Microscale Thermophoresis
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Protein Purification-free Method of Binding Affinity Determination by Microscale Thermophoresis

Protein Purification-free Method of Binding Affinity Determination by Microscale Thermophoresis

DOI:
10.3791/50541-v

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10:22 min

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August 15, 2013

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, , , , , ,
1Cancer and Inflammation Program,National Cancer Institute, 2Basic Science Program,SAIC-Frederick, Inc., 3Departments of Oncology and Radiation Medicine,Georgetown University Medical Center, 4Structural Biophysics Laboratory,National Cancer Institute

Chapters

  • 00:05Title
  • 01:43Preparation of Cell Lysate
  • 03:20Determination of Optimal Lysate Dilution
  • 04:02Microscale Thermophoresis Binding Studies
  • 07:05Microscale Thermophoresis Data Analysis
  • 08:25Results: Measuring the Affinity of Non-phosphorylated STAT3 Protein Binding to Oligonucleotides
  • 09:40Conclusion

Summary

자동 번역

자동 번역

Microscale thermophoresis (MST) can be widely used for determination of binding affinity without purification of the target protein from cell lysates. The protocol involves overexpression of the GFP-fused protein, cell lysis in non-denaturing conditions, and detection of MST signal in the presence of varying concentrations of the ligand.

Tags

Protein PurificationMicroscale ThermophoresisBinding AffinityKD DeterminationGFP-fused ProteinSTAT3Cell LysateNon-denaturing ConditionsDrug DiscoveryProtein Interactions

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