Tyr66 as a Switch in SHP-2 Function
Author Information
Author(s): Guvench Olgun, Qu Cheng-Kui, MacKerell Alexander D Jr
Primary Institution: University of Maryland School of Pharmacy
Hypothesis
Tyr66 acts as a conformational switch in the closed-to-open transition of the SHP-2 N-SH2-domain phosphotyrosine-peptide binding cleft.
Conclusion
Tyr66 and surrounding residues play a regulatory role in SHP-2 function, and mutations at these sites can negatively impact pY-peptide binding.
Supporting Evidence
- Mutations at Tyr66, Asp40, Lys55, and Gln57 are predicted to disrupt the switching mechanism.
- The study suggests that the open cleft conformation is thermodynamically more favorable when N-SH2 is not bound to PTP.
- Molecular dynamics simulations indicate that transitions between conformations are not diffusion controlled.
Takeaway
Tyr66 is like a switch that can open or close a door in a protein, helping it to do its job better or worse depending on its shape.
Methodology
Explicit-solvent molecular dynamics simulations were used to study the closed-to-open transition of the N-SH2 pY-peptide binding cleft.
Limitations
The study primarily focuses on molecular dynamics simulations, which may not capture all biological complexities.
Digital Object Identifier (DOI)
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