pStab

Prediction of Stable Mutants, Unfolding Curves, Stability Maps and Protein Electrostatic Frustration

Hot-Spots and Frustration

∆Eelec Distribution

Thermal Unfolding Curves

Local Stability Profile

Input parameters

pH = 7      T = 298 K     Ionic strength = 0.1 M     No. of allowed mutations = 3

Charged/Polar residues to be excluded = None

NOTE: Hover mouse over data-point to see value and select area to zoom.

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Based on Charge

Based on pairwise Eelec

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NOTE: Use your mouse to drag, rotate, and zoom in and out of the structure.

Positively charged  /  Negatively charged

Favorable  /  Unfavorable

Download the electrostatic frustration map of wild type protein.

D O W N L O A D

Input parameters

pH = 7      T = 298 K     Ionic strength = 0.1 M     No. of allowed mutations = 3

Charged/Polar residues to be excluded = None

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NOTE: Click on legend to show/hide data-series.

No. of Substitutions No. of Mutants Generated No. of Stable Mutants
Single Mutants 44 12
Double Mutants 924 141
Triple Mutants 12320 1030
All Mutants 13288 1183

Download the list of top 5000 stable mutants.

D O W N L O A D

Input parameters

Exp. Tm of WT = 333 K     pH = 7      Temperature = 298 K     Ionic strength = 0.1 M

Entropic cost: Secondary structure based entropic cost

Method: Generate mutant(s) by virtual mutagenesis

NOTE: Click on legend to show/hide data-series.

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Mutant Index Protein Variant Tm (K) ΔTm (K)
- Wild-Type 333.6 -
1 E18Q/E24K/R42Q 341.5 7.9

Download the unfolding curves of wild type and mutant proteins.

D O W N L O A D

Input parameters

Exp. Tm of WT = 333 K     pH = 7      Temperature = 298 K     Ionic strength = 0.1 M

Entropic cost: Secondary structure based entropic cost

Method: Generate mutant(s) by virtual mutagenesis

NOTE: Click on legend to show/hide data-series.

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NOTE: Click on Zoom In to visualize trends.

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Download the local stability profiles of wild type and mutant proteins.

D O W N L O A D

  Protein Biophysics Lab

2017, Maintained by Protein Biophysics Lab, IIT Madras, Chennai-36, India

Last Updated: September 13, 2017