Table 3 Effect of Mutations on Protein Stability and Interactions with Ligand, Nucleic acid and Other Protein Subunits.

From: Structural Implications of Mutations Conferring Rifampin Resistance in Mycobacterium leprae

Impact of Mutations on Protein Stability and Ligand Interaction (ΔΔG in kcal/mol) *

Prediction Tools

D441Y

D441V

S437L

H476R

mCSM

0.042

1.513

−0.031

−0.933

mCSM-lig

−0.147

−0.204

−0.268

−0.516

mCSM-NA

5.990

0.345

−3.55

−1.008

mCSM-PPI

−0.294

0.155

−0.555

−1.171

DUET

0.002

1.597

0.190

−0.956

SDM2

−0.710

0.330

1.280

−1.870

ENCoM & FoldX4**

2.020

1.210

1.880

2.110

Interface Residue

No

No

No

Yes

Distance from the Interface

7.080 Å

7.080 Å

7.090 Å

3.550 Å

Distance from the Ligand

3.435 Å

3.435 Å

4.000 Å

16.745 Å

Distance from the Nucleic Acids

7.082 Å

7.082 Å

12.344 Å

8.624 Å

  1. *Except for ENCoM & FoldX4, all the positive values indicate a stabilizing effect while the negative values indicate a destabilizing effect of the mutations.
  2. **The final energy change is calculated as the sum of the predictions by ENCoM and FoldX4 and hence a ΔΔG of >0.5 kcal/mol is considered as a destabilizing mutation.