To delineate the mechanism by which LPHN2 participates in the MET process, we performed proteomic analyses to investigate the LPHN2 interactome in mouse cochleae. The Flag-tagged LPHN2-GAIN construct with deletion of the 523 N-terminal residues of LPHN2 showed mechanosensitive potential that was comparable to that of full-length LPHN2. We therefore purified the Flag-tagged LPHN2-GAIN protein to use as bait to identify potential candidate proteins that coordinate LPHN2 function in vivo.