Table 1 Experimentally characterised designed Nb.b201 variants

From: Automated optimisation of solubility and conformational stability of antibodies and proteins

Nb.b201 variant

Tm (°C)

AMS50% (M)

CIC RT (min)

ΔTm (°C)

ΔRT (s)

WT

70.1 ± 0.05

0.76 in (0.75,0.79)

11.859 ± 0.003

0

0

A31D

72.7 ± 0.1

1.25 in (1.20,1.28)

11.543 ± 0.014

2.6 ± 0.1

−19.0 ± 1.1

H53P

70.5 ± 0.05

0.94 in (0.82,1.19)

11.889 ± 0.001

0.4 ± 0.05

1.8 ± 0.1

H53R

71.3 ± 0.05

1.40 in (1.31,1.42)

12.033 ± 0.002

1.2 ± 0.05

10.4 ± 0.3

T55D

76.6 ± 0.3

1.37 in (1.16,1.47)

11.399 ± 0.003

6.5 ± 0.3

−27.6 ± 0.0

T55G

80.7 ± 0.1

1.22 in (1.04,1.35)

11.588 ± 0.003

10.6 ± 0.1

−16.2 ± 0.0

T100K

74.7 ± 0.1

1.47 in (1.45,1.48)

11.736 ± 0.001

4.6 ± 0.1

−7.4 ± 0.1

T100R

73.1 ± 0.05

1.25 in (1.07,1.39)

11.932 ± 0.002

3.0 ± 0.05

4.4 ± 0.3

A31D T55D

78.5 ± 0.1

1.27 in (1.09,1.42)

11.045 ± 0.001

8.4 ± 0.1

−48.8 ± 0.2

A31D T55G

82.9 ± 0.2

1.49 in (1.45,1.51)

11.204 ± 0.001

12.8 ± 0.2

−39.3 ± 0.2

H53P T55G

80.4 ± 0.1

1.61 in (1.58,1.65)

11.872 ± 0.002

10.3 ± 0.1

0.8 ± 0.3

A31D H53P T55G

82.0 ± 0.1

1.18 in (1.08,1.22)

11.444 ± 0.003

11.9 ± 0.1

−24.9 ± 0.4

A31D H53P T55G T100K

83.7 ± 0.1

1.19 in (1.06,1.38)

11.120 ± 0.001

13.6 ± 0.1

−44.3 ± 0.2

  1. WT and rationally designed mutational variants with their measured conformational stability (apparent melting temperature, Tm; apparent because heat denaturation is not reversible), relative solubility in ammonium sulphate precipitation (AMS50%), and cross interaction chromatography retention time (CIC RT). Values are mean ± standard deviation, except for the relative solubility column, which reports fitted AMS50% and lower and upper 95% confidence interval on this fitting parameter (see Fig. S7). Tm was measured in duplicates and reported at a 0.1 °C resolution, when the two measurements were identical a standard deviation of 0.05 was arbitrarily assigned. Δ are calculated as differences between the value of the variant under scrutiny and that of the corresponding WT.