VU0357121 do not bind at the MPEP allosteric site of mGlu5, thus do not possess mGlu5 NAM activity. The A809V/rmGlu5 mutation inhibited the ability of VU0357121 to shift the glutamate concentration−response curve, whereas the response to VU0357121 is not altered by the F585I/rmGlu5 mutation. VU0357121 show weaker cooperativity in the Ca mobilization assay in the low-expressing HEK293A-mGlu5 cell line.
