Understanding How Connexin43 Binds to ZO-1 PDZ2
Author Information
Author(s): Xiao Fei, Weng Jingwei, Fan Kangnian, Wang Wenning
Primary Institution: Fudan University
Hypothesis
How do the interactions between ZO-1 PDZ2 and connexin43 peptides vary with peptide length and phosphorylation?
Conclusion
The study reveals that phosphorylation at Ser(-9) significantly weakens the binding of connexin43 to ZO-1 PDZ2.
Supporting Evidence
- The binding of connexin43 to ZO-1 PDZ2 is mediated by its C-terminal tail.
- Phosphorylation at Ser(-9) disrupts the binding of connexin43 to ZO-1 PDZ2.
- Longer peptides of connexin43 show higher binding affinity to ZO-1 PDZ2.
Takeaway
This study shows that a protein called connexin43 can stick to another protein called ZO-1, but if a tiny part of connexin43 gets changed (phosphorylated), it can't stick as well anymore.
Methodology
Molecular dynamics simulations were used to study the interactions between ZO-1 PDZ2 and different lengths of connexin43 peptides.
Limitations
The simulations may not fully capture the conformational spaces of the peptides due to the initial structures not being 'native'.
Digital Object Identifier (DOI)
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