Plot of the experimentally determined TS binding free energies
(ΔGTSbind,obs) versus the
calculated TS binding free energies
(ΔGTSbind,calc) with the entire dNTP-TS in
region I, using the LRA method and the MD62+
magnesium model. The correlation for the mismatches (dashed line) is shifted
by about 5 kcal/mol, compared to the matches (solid line, taken from Reference 16). The nascent base pairs
for wild-type pol β are: (◆) A:T, (■) G:C,
(◊) A:C, (□) G:T; for the R149A mutant: (+) A:T,
(✳) G:C, (×) A:C; for R183A: (▲) A:T, (▼)
G:C, (△) A:C, (∇) G:T; and for K280A: (●) G:C,
(○) G:T.