The calcium-binding protein S100A1 binds to titin’s N2A insertion sequence in a pH-dependent manner
2024
S100A1 Binding to Titin's N2A Region
publication
10 minutes
Evidence: moderate
Author Information
Author(s): Sabrina I. Apel, Emily Schaffter, Nicholas Melisi, Matthew J. Gage
Primary Institution: University of Massachusetts Lowell
Hypothesis
S100A1 might regulate N2A binding, similar to how it regulates binding of PEVK to F-actin.
Conclusion
S100A1 binds to the N2A region of titin, and this interaction is regulated by calcium concentration and pH.
Supporting Evidence
- S100A1 binding to titin's N2A region is regulated by calcium concentration.
- Binding affinity increases as pH decreases, indicating a physiological response.
- Conformational changes in UN2A occur upon S100A1 binding.
Takeaway
This study shows that a protein called S100A1 sticks to another protein called titin in muscles, and this sticking changes depending on calcium levels and acidity.
Methodology
The study used size exclusion chromatography, surface plasmon resonance, and fluorescence resonance energy transfer to investigate the binding of S100A1 to the UN2A region of titin.
Statistical Information
P-Value
p<0.05
Digital Object Identifier (DOI)
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