Intracellular phosphorylation
states fine-tune mGluR2 signaling.
(A) Dose–response curves for wild-type mGluR2 (blue); T832E,
S833E, and S837E mGluR2 (orange); T832A, S833A, and S837A mGluR2 (purple);
S867E, T868E, T869E, S870E, and S871E mGluR2 (pink); and S867A, T868A,
T869A, S870A, and S871A mGluR2 (green). Quantification of (B) half-maximal
effective concentration (EC50) and (C) maximal efficacy
(EMAX) for l-glutamic acid. (D)
Coulombic electrostatic potential map for CryoEM structure 7MTS; inset
shows the intracellular pocket of mGluR2 complexed with Gi. Error bars represent the standard error of the mean
(N = 3 biological replicates and 2 technical replicates).
Asterisks indicate a statistical comparison using a one-way ANOVA
with multiple comparisons to WT. Significant differences are denoted
as follows: *** = p ≤ 0.001, **** = p ≤ 0.0001.