Table 9 The energetic states of the tunnel to the active site of the enzyme.

From: Stability and functional consequences of disulfide bond engineering in Aspergillus flavus uricase

 

WT

Mutein 1

Mutein 2

Mutein 3

Mutein 4

Mutein 5

Mutein 6

E-bound

−4

−4.2

−5.3

−4.1

−4.1

13.1

−6.3

E-max

−3.8

−4.1

−5.1

−3.8

−3.7

13.1

−4.5

E-surface

−4.7

−4.7

−5.6

−4.6

−4.6

−4.9

−4.5

Ea

0.9

0.6

0.5

0.8

0.9

18

0

ΔEBS

0.7

0.5

0.3

0.5

0.5

18

−1.8

  1. E-bound: Binding energy of the substrate within the tunnel.
  2. E-max: Maximum energy barrier along the tunnel pathway.
  3. E-surface: Energy at the tunnel entrance on the protein surface.
  4. Ea: Activation energy or energetic difference from the surface to the active site.
  5. ΔEbs (Energy Difference between Bound State and Surface): Energy difference between the substrate bound state and the unbound state.