For instance, dermatomyositis autoantigens include Mi-2 [3], TIF1ꝩ [4], NXP2 [5], MDA5 [6], or SAE [7]; antisynthetase syndrome patients have autoantibodies recognizing one of the aminoacyl-tRNA synthetases including Jo1 [8], PL7 [9], and PL12 [10, 11]; immune-mediated necrotizing myopathy patients have autoantibodies recognizing either SRP [12] or HMGCR [13]; and autoantibodies recognizing EXOSC 9/10 (anti-PM/Scl) are linked to overlap myositis [14]. Here, MORC3 is linked to dermatomyositis.