Table 1.
wild-type GluN1/GluN2A | 1-G620R/GluN2A | wild-type GluN1/GluN2B | 1-G620R/GluN2B | |
---|---|---|---|---|
Glutamate, EC50, μM (n) | 4.2 ± 0.48 (16) | 7.5 ± 0.40 (13)a | 0.80 ± 0.15 (9) | 2.3 ± 0.30 (8)a |
Glycine, EC50, μM (n) | 1.0 ± 0.06 (16) | 1.9 ± 0.10 (13)a | 0.27 ± 0.04 (6) | 0.49 ± 0.02 (5)a |
Mg2+, IC50, μM (n)b | 25 ± 2.3 (10) | 446 ± 265 (13)a | 22 ± 2.5 (6) | >1000a |
Proton, % (n)c | 47 ± 2.7 (12) | 25 ± 1.4 (11)a | 16 ± 1.2 (6) | 9.6 ± 0.29 (5)a |
Zinc, IC50, nM (n) | 24 ± 2.6 (5) | 9.2 ± 0.28 (8)a | – | – |
% inhibition by zincd | 53 ± 2.3% (5) | 77 ± 1.6% (8)a | – | – |
The data are expressed as mean ± s.e.m. (n).
P<0.01, compared to the corresponding wild type, unpaired t-test; agonist potency was compared using logEC50 or logIC50 values.
Holding potential of −60 mV.
Percentage current remaining at pH 6.8 compared with the pH 7.6.
At 300 nM of zinc.
For all comparisons, number of samples was chosen a priori to give power to detect a 40% change of 0.8.