Apparent Octanoate Affinity (K1/2) of Various Mutants of E166
. | −160 mV . | −140 mV . | −120 mV . | −100 mV . | −80 mV . | −60 mV . | −40 mV . |
|---|---|---|---|---|---|---|---|
| E166G | 0.175 ± 0.019a | 0.115 ± 0.014 | 0.082 ± 0.008 | 0.075 ± 0.006 | 0.085 ± 0.006 | 0.127 ± 0.008 | 0.225 ± 0.013 |
| E166A | 0.0019 ± 0.0001 | 0.0028 ± 0.0002 | 0.0047 ± 0.0002 | 0.0082 ± 0.0002 | 0.0157 ± 0.0007 | 0.0297 ± 0.0014 | 0.0643 ± 0.0037 |
| E166S | 0.016 ± 0.002 | 0.026 ± 0.003 | 0.050 ± 0.003 | 0.100 ± 0.009 | 0.198 ± 0.011 | 0.403 ± 0.022 | 0.855 ± 0.037 |
| E166C | 0.0020 ± 0.0005 | 0.0035 ± 0.0008 | 0.0056 ± 0.0011 | 0.0102 ± 0.0018 | 0.0207 ± 0.0034 | 0.0431 ± 0.0064 | 0.0885 ± 0.0171 |
| E166N | 0.125 ± 0.002 | 0.212 ± 0.004 | 0.380 ± 0.009 | 0.694 ± 0.018 | 1.335 ± 0.029 | 2.551 ± 0.047 | 4.93 ± 0.18 |
| E166 | 0.19 ± 0.04 | 0.26 ± 0.03 | 0.30 ± 0.02 | 0.39 ± 0.01 | 0.67 ± 0.05 | 1.29 ± 0.13 | 2.61 ± 0.30 |
| E166V | 0.0060 ± 0.0004 | 0.0102 ± 0.0008 | 0.0184 ± 0.0015 | 0.0353 ± 0.0028 | 0.0672 ± 0.0037 | 0.1258 ± 0.0065 | 0.231 ± 0.014 |
| E166Q | 0.88 ± 0.09 | 1.45 ± 0.10 | 2.53 ± 0.16 | 4.21 ± 0.24 | 6.94 ± 0.36 | 11.41 ± 0.69 | 17.8 ± 1.5 |
| E166H | 4.57 ± 0.28 | 7.02 ± 0.40 | 11.47 ± 0.57 | 18.39 ± 0.81 | 29.55 ± 1.30 | ND | ND |
| E166I | 0.009 ± 0.001 | 0.015 ± 0.002 | 0.026 ± 0.003 | 0.045 ± 0.007 | 0.079 ± 0.013 | 0.136 ± 0.026 | 0.218 ± 0.049 |
| E166L | 0.011 ± 0.001 | 0.018 ± 0.002 | 0.032 ± 0.003 | 0.057 ± 0.005 | 0.106 ± 0.010 | 0.192 ± 0.022 | 0.342 ± 0.053 |
| E166K | 7.24 ± 0.33 | 10.62 ± 0.45 | 15.36 ± 0.50 | 21.65 ± 0.54 | 29.24 ± 0.53 | ND | ND |
| E166F | 0.091 ± 0.001 | 0.150 ± 0.004 | 0.254 ± 0.007 | 0.455 ± 0.015 | 0.803 ± 0.050 | 1.63 ± 0.16 | 3.09 ± 0.56 |
| E166Y | 3.36 ± 0.18 | 4.99 ± 0.31 | 7.43 ± 0.41 | 11.16 ± 0.54 | 16.70 ± 0.65 | ND | ND |
| E166W | 3.50 ± 0.59 | 5.53 ± 0.87 | 8.6 ± 1.3 | 13.0 ± 2.0 | 19.2 ± 3.3 | ND | ND |
. | −160 mV . | −140 mV . | −120 mV . | −100 mV . | −80 mV . | −60 mV . | −40 mV . |
|---|---|---|---|---|---|---|---|
| E166G | 0.175 ± 0.019a | 0.115 ± 0.014 | 0.082 ± 0.008 | 0.075 ± 0.006 | 0.085 ± 0.006 | 0.127 ± 0.008 | 0.225 ± 0.013 |
| E166A | 0.0019 ± 0.0001 | 0.0028 ± 0.0002 | 0.0047 ± 0.0002 | 0.0082 ± 0.0002 | 0.0157 ± 0.0007 | 0.0297 ± 0.0014 | 0.0643 ± 0.0037 |
| E166S | 0.016 ± 0.002 | 0.026 ± 0.003 | 0.050 ± 0.003 | 0.100 ± 0.009 | 0.198 ± 0.011 | 0.403 ± 0.022 | 0.855 ± 0.037 |
| E166C | 0.0020 ± 0.0005 | 0.0035 ± 0.0008 | 0.0056 ± 0.0011 | 0.0102 ± 0.0018 | 0.0207 ± 0.0034 | 0.0431 ± 0.0064 | 0.0885 ± 0.0171 |
| E166N | 0.125 ± 0.002 | 0.212 ± 0.004 | 0.380 ± 0.009 | 0.694 ± 0.018 | 1.335 ± 0.029 | 2.551 ± 0.047 | 4.93 ± 0.18 |
| E166 | 0.19 ± 0.04 | 0.26 ± 0.03 | 0.30 ± 0.02 | 0.39 ± 0.01 | 0.67 ± 0.05 | 1.29 ± 0.13 | 2.61 ± 0.30 |
| E166V | 0.0060 ± 0.0004 | 0.0102 ± 0.0008 | 0.0184 ± 0.0015 | 0.0353 ± 0.0028 | 0.0672 ± 0.0037 | 0.1258 ± 0.0065 | 0.231 ± 0.014 |
| E166Q | 0.88 ± 0.09 | 1.45 ± 0.10 | 2.53 ± 0.16 | 4.21 ± 0.24 | 6.94 ± 0.36 | 11.41 ± 0.69 | 17.8 ± 1.5 |
| E166H | 4.57 ± 0.28 | 7.02 ± 0.40 | 11.47 ± 0.57 | 18.39 ± 0.81 | 29.55 ± 1.30 | ND | ND |
| E166I | 0.009 ± 0.001 | 0.015 ± 0.002 | 0.026 ± 0.003 | 0.045 ± 0.007 | 0.079 ± 0.013 | 0.136 ± 0.026 | 0.218 ± 0.049 |
| E166L | 0.011 ± 0.001 | 0.018 ± 0.002 | 0.032 ± 0.003 | 0.057 ± 0.005 | 0.106 ± 0.010 | 0.192 ± 0.022 | 0.342 ± 0.053 |
| E166K | 7.24 ± 0.33 | 10.62 ± 0.45 | 15.36 ± 0.50 | 21.65 ± 0.54 | 29.24 ± 0.53 | ND | ND |
| E166F | 0.091 ± 0.001 | 0.150 ± 0.004 | 0.254 ± 0.007 | 0.455 ± 0.015 | 0.803 ± 0.050 | 1.63 ± 0.16 | 3.09 ± 0.56 |
| E166Y | 3.36 ± 0.18 | 4.99 ± 0.31 | 7.43 ± 0.41 | 11.16 ± 0.54 | 16.70 ± 0.65 | ND | ND |
| E166W | 3.50 ± 0.59 | 5.53 ± 0.87 | 8.6 ± 1.3 | 13.0 ± 2.0 | 19.2 ± 3.3 | ND | ND |
The K1/2 values are presented as mean ± SEM (in mM).