Related Experiment Videos
Increasing protein stability using a rational approach combining sequence homology and structural alignment:
X Jiang1, J Kowalski, J W Kelly
1Department of Chemistry and the Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 Torrey Pines Road, La Jolla, CA 92037, USA.
Protein Science : a Publication of the Protein Society
|June 23, 2001
Summary
Protein engineers enhanced WW domain stability by 28°C using structural insights and targeted mutations. This novel approach combines sequence and structure to design more stable proteins.
Area of Science:
- Protein Engineering
- Structural Biology
- Biophysics
Background:
- Homology-based protein design often focuses on low-sequence-identity positions.
- Understanding stabilizing interactions in protein cores is crucial for design.
Purpose of the Study:
- To investigate the role of semi-conserved core and proximal residues in WW domain stability.
- To enhance WW domain stability using a combination of sequence homology and structural information.
Main Methods:
- Focused on semi-conserved core residues and proximal residues for mutation.
- Utilized structural considerations to guide the design of stabilizing interactions.
- Introduced synergistic mutations (A20R/L30Y) and a remote mutation (D34T).
Main Results:
- Achieved a significant increase in WW domain stability (2.5 kcal mol(-1)).
- Increased the melting temperature (T(m)) by 28°C.
- Synergistic mutations enhanced hydrophobic and electrostatic interactions, exceeding additive predictions.
Conclusions:
- Combining sequence homology with structural insights enables effective protein stabilization.
- Targeting core and proximal residues can yield significant improvements in protein stability.
- The designed hYap WW domain exhibits enhanced stability compared to parent structures.