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Table 4 ΔΔG values for Class A β-lactamases and BLIP Y50 mutants

From: Systematic substitutions at BLIP position 50 result in changes in binding specificity for class A β-lactamases

  BLIP Mutant ΔΔG(kcal/mol) KPC-2 ΔΔG(kcal/mol) TEM-1 ΔΔG(kcal/mol) Bla1
Nonpolar Y50A 0.14 ± 0.03 -2.4 ± 0.5 -0.44 ± 0.07
Y50F 2.2 ± 0.4 1.8 ± 0.4 1.4 ± 0.3
Y50L -0.5 ± 0.1 -0.6 ± 0.2 2.5 ± 0.7
Y50M -0.7 ± 0.2 -0.9 ± 0.2 1.6 ± 0.5
Y50V 1.1 ± 0.2 1.2 ± 0.3 2.7 ± 0.4
Y50W 1.2 ± 0.3 1.9 ± 0.4 2.1 ± 0.4
Polar Y50C 2.0 ± 0.4 2.9 ± 0.7 3.0 ± 0.4
Y50N 0.6 ± 0.1 1.7 ± 0.3 2.6 ± 0.7
Y50Q -0.2 ± 0.1 -0.4 ± 0.1 -0.4 ± 0.1
Y50S 0.7 ± 0.2 0.5 ± 0.1 4.3 ± 0.5
Y50T 0.51 ± 0.09 1.0 ± 0.2 2.9 ± 0.6
Small Y50G -0.44 ± 0.06 -0.13 ± 0.03 -0.9 ± 0.2
Y50P 0.7 ± 0.2 2.6 ± 0.6 2.7 ± 0.5
Charged Y50H 0.042 ± 0.006 1.4 ± 0.3 2.7 ± 0.3
Y50R 1.2 ± 0.2 3.0 ± 0.6 >3.9
Y50K 3.1 ± 0.4 3.6 ± 0.7 2.6 ± 0.7
Y50D 0.46 ± 0.07 3.5 ± 0.9 >4.5
Y50E 0.8 ± 0.1 3.0 ± 0.7 2.9 ± 0.4
  1. BLIP Y50I could not be purified