Involved in myoblast fusion; plasma membrane fusion; and positive regulation of skeletal muscle hypertrophy. Acts upstream of or within myoblast fusion involved in skeletal muscle regeneration. Located in plasma membrane. Is integral component of Golgi membrane and integral component of plasma membrane. Is expressed in several structures, including limb; skeletal musculature; somite; and tongue. Human ortholog(s) of this gene implicated in Carey-Fineman-Ziter syndrome. Orthologous to human MYMK (myomaker, myoblast fusion factor). [provided by Alliance of Genome Resources, Apr 2022]