How TBP Binding Affects the Glucocorticoid Receptor's AF1 Domain
Author Information
Author(s): Khan Shagufta H., Ling Jun, Kumar Raj
Primary Institution: The Commonwealth Medical College
Hypothesis
Binding of TBP to AF1 results in the structural rearrangement of the ID AF1 domain such that its surfaces become easily accessible for interaction with other coactivators.
Conclusion
TBP binding induces structure formation in the GR AF1, facilitating its interaction with SRC-1 and enhancing transcriptional activity.
Supporting Evidence
- TBP binding significantly increases the helical content of the GR AF1 domain.
- Immunoprecipitation assays showed that TBP binding enhances the interaction between AF1 and SRC-1.
- Transcriptional activity was enhanced by 8-fold when AF1 was complexed with TBP.
Takeaway
When a protein called TBP binds to a part of another protein called the glucocorticoid receptor, it helps that part change shape so it can work better with other helpers to turn on genes.
Methodology
The study used surface plasmon resonance (SPR) to analyze binding kinetics and circular dichroism (CD) spectroscopy to assess structural changes.
Limitations
The study did not provide a complete kinetic analysis of the interaction due to technical limitations.
Statistical Information
P-Value
0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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