Table 1. Stability, folding/unfolding rates, and Φ values of the mutants.
Mutation* | Whighq,† % | Nat. Cont.‡ | Wlowq,§ % | τf,¶ ns | Nf∥ | τu,** ns | Nu†† | , kcal/mol‡‡ | , kcal/mol‡‡ | Φ‡‡§§ |
---|---|---|---|---|---|---|---|---|---|---|
WT | 21.4 | 19.3 ± 1.7 | 2.9 | 70 ± 10 | 92 | 67 ± 6 | 94 | |||
W2A | 26.5 | 18.1 ± 2.3 | 3.5 | 107 ± 14 | 108 | 63 ± 6 | 114 | –0.32 ± 0.15 | –0.28 ± 0.13 | 0.87 ± 0.57 |
W2F | 33.5 | 18.8 ± 2.2 | 3.4 | 106 ± 14 | 97 | 82 ± 8 | 103 | –0.14 ± 0.16 | –0.27 ± 0.13 | — |
W2L | 24.9 | 18.2 ± 2.2 | 6.3 | 109 ± 16 | 101 | 63 ± 5 | 111 | –0.34 ± 0.16 | –0.30 ± 0.14 | 0.87 ± 0.57 |
W2V | 23.6 | 18.3 ± 2.3 | 4.4 | 124 ± 17 | 95 | 62 ± 6 | 102 | –0.43 ± 0.16 | –0.38 ± 0.13 | 0.89 ± 0.45 |
W2Y | 21.9 | 18.5 ± 2.4 | 6.4 | 129 ± 21 | 93 | 65 ± 6 | 98 | –0.43 ± 0.16 | –0.41 ± 0.14 | 0.95 ± 0.49 |
13A | 19.9 | 18.7 ± 2.2 | 3.9 | 137 ± 18 | 92 | 64 ± 5 | 101 | –0.48 ± 0.15 | –0.44 ± 0.13 | 0.93 ± 0.40 |
13F | 33.0 | 18.8 ± 2.1 | 3.3 | 121 ± 22 | 83 | 93 ± 8 | 91 | –0.15 ± 0.17 | –0.36 ± 0.15 | — |
13L | 28.5 | 18.5 ± 2.4 | 3.9 | 119 ± 19 | 94 | 72 ± 7 | 101 | –0.31 ± 0.17 | –0.35 ± 0.14 | 1.1 ± 0.77 |
13M | 30.2 | 18.9 ± 2.2 | 5.4 | 108 ± 19 | 94 | 81 ± 9 | 102 | –0.16 ± 0.17 | –0.29 ± 0.15 | — |
13V | 37.2 | 18.6 ± 2.1 | 5.2 | 124 ± 18 | 75 | 109 ± 10 | 83 | –0.06 ± 0.16 | –0.38 ± 0.14 | — |
W10A | 31.8 | 19.5 ± 2.1 | 5.0 | 161 ± 21 | 74 | 95 ± 10 | 79 | –0.32 ± 0.16 | –0.55 ± 0.13 | 1.7 ± 0.93 |
W10F | 41.3 | 18.7 ± 2.2 | 3.8 | 77 ± 9 | 120 | 78 ± 6 | 127 | 0.04 ± 0.14 | –0.06 ± 0.12 | — |
W10G | 12.7 | 19.3 ± 2.2 | 3.1 | 212 ± 32 | 60 | 68 ± 9 | 69 | –0.72 ± 0.17 | –0.73 ± 0.14 | 1.0 ± 0.31 |
W10I | 30.8 | 18.3 ± 2.1 | 6.0 | 129 ± 17 | 77 | 88 ± 9 | 83 | –0.23 ± 0.16 | –0.40 ± 0.13 | — |
W10L | 20.8 | 18.8 ± 2.2 | 4.2 | 166 ± 22 | 81 | 58 ± 5 | 87 | –0.67 ± 0.16 | –0.57 ± 0.13 | 0.86 ± 0.28 |
W10M | 18.4 | 19.0 ± 2.2 | 6.6 | 155 ± 21 | 82 | 52 ± 5 | 91 | –0.68 ± 0.16 | –0.52 ± 0.13 | 0.76 ± 0.26 |
W10V | 17.2 | 17.8 ± 2.5 | 6.7 | 259 ± 40 | 57 | 65 ± 11 | 64 | –0.88 ± 0.19 | –0.86 ± 0.14 | 0.98 ± 0.26 |
W10Y | 26.2 | 19.0 ± 2.1 | 3.5 | 118 ± 15 | 94 | 77 ± 7 | 98 | –0.26 ± 0.15 | –0.35 ± 0.13 | — |
Y11A | 5.7 | 18.1 ± 2.0 | 2.3 | 249 ± 38 | 64 | 30 ± 3 | 71 | –1.37 ± 0.17 | –0.84 ± 0.14 | 0.61 ± 0.13 |
Y11F | 33.1 | 19.1 ± 2.2 | 4.4 | 138 ± 20 | 73 | 112 ± 12 | 79 | –0.11 ± 0.16 | –0.45 ± 0.14 | — |
Y11L | 14.8 | 18.6 ± 2.1 | 4.8 | 169 ± 23 | 76 | 54 ± 6 | 83 | –0.72 ± 0.16 | –0.58 ± 0.13 | 0.81 ± 0.26 |
Y11M | 11.3 | 18.0 ± 2.2 | 3.5 | 152 ± 24 | 95 | 35 ± 3 | 105 | –0.94 ± 0.16 | –0.51 ± 0.14 | 0.54 ± 0.18 |
Y11V | 5.7 | 17.0 ± 2.7 | 7.4 | |||||||
I18A | 12.3 | 18.5 ± 2.3 | 2.4 | 168 ± 22 | 80 | 53 ± 6 | 88 | –0.73 ± 0.16 | –0.58 ± 0.13 | 0.79 ± 0.25 |
I18F | 21.3 | 19.0 ± 2.0 | 3.2 | 159 ± 23 | 74 | 72 ± 8 | 83 | –0.50 ± 0.17 | –0.54 ± 0.14 | 1.1 ± 0.46 |
I18L | 22.2 | 19.0 ± 2.2 | 4.4 | 145 ± 19 | 73 | 94 ± 9 | 81 | –0.26 ± 0.16 | –0.48 ± 0.13 | — |
I18M | 28.9 | 18.8 ± 2.2 | 4.8 | 97 ± 15 | 99 | 77 ± 6 | 106 | –0.13 ± 0.16 | –0.22 ± 0.14 | — |
I18V | 29.6 | 18.8 ± 2.3 | 3.2 | 124 ± 20 | 87 | 86 ± 9 | 93 | –0.22 ± 0.17 | –0.38 ± 0.14 | — |
Y19A | 20.7 | 18.6 ± 2.4 | 7.4 | 123 ± 18 | 90 | 84 ± 8 | 95 | –0.23 ± 0.16 | –0.37 ± 0.14 | — |
Y19F | 29.2 | 18.4 ± 2.2 | 3.8 | 130 ± 18 | 92 | 71 ± 7 | 98 | –0.37 ± 0.16 | –0.41 ± 0.13 | 1.1 ± 0.59 |
Y19L | 30.0 | 18.3 ± 2.2 | 3.2 | 117 ± 17 | 83 | 88 ± 8 | 89 | –0.17 ± 0.16 | –0.34 ± 0.13 | — |
Y19M | 17.5 | 18.5 ± 2.3 | 6.2 | 155 ± 26 | 68 | 97 ± 10 | 76 | –0.28 ± 0.17 | –0.52 ± 0.15 | — |
Mutants in italics are radical but acceptable and mutations in Roman are conservative (see Methods and ref. 24)
Statistical weight of the three most populated clusters with Q ≥ 16/24
Average number of contacts in the three most populated clusters with Q ≥ 16/24
Statistical weight of the three most populated clusters with Q < 16/24
Average folding time
Number of folding events
Average unfolding time
Number of unfolding events
The SD have been obtained by propagation of the error on τf and τu
Dashes indicate unreliable Φ values because of kcal/mol. The reliable Φ values and the corresponding large stability changes (24) are bold. The multipoint Φ values are 0.77, 0.60, 0.79, 0.46, 0.72, and 1.23 for W2, I3, W10, Y11, I18, and Y19, respectively