Involved in binding activity of sperm to zona pellucida; flagellated sperm motility; and regulation of flagellated sperm motility. Located in acrosomal membrane; extracellular region; and plasma membrane. Is anchored component of plasma membrane. Is expressed in genitourinary system and submandibular gland. Orthologous to human TEX101 (testis expressed 101). [provided by Alliance of Genome Resources, Apr 2022]