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. 2016 Jul 18;7:96. doi: 10.3389/fendo.2016.00096

Figure 9.

Figure 9

Importance of MRAP Lys residues for function, orientation, and stability. CHO cells were transfected with no accessory protein, wild-type MRAP or (4K to R)MRAP with the four native Lys residues mutated to Arg. (A) Surface expression of the N-terminal V5 and C-terminal Flag epitopes of MRAP and (4K to R)MRAP, and surface expression of co-transfected HA-tagged MC2 receptor. Results are normalized to values with wild-type MRAP. (B) cAMP responses to ACTH in cells co-transfected with MC2 receptor and CRE-luciferase. (C) Cells expressing MRAP or (4K to R)MRAP were incubated for the times shown with 10 μg/ ml cycloheximide (CHX), 50 μM MG132 or both. Lysates were run on gels and blotted for Flag epitope. *P < 0.05 vs. corresponding value in cells expressing wild-type MRAP.