PLP1(Proteolipid protein 1) is a transmembrane proteolipid protein that is the predominant component of myelin. PLP1 plays a crucial role in the formation and maintenance of myelin sheaths in the central nervous system, which are essential for proper conduction of electrical impulses along nerve fibers. PLP1 is predominantly located in oligodendrocytes, where PLP1 contributes to the structural integrity of myelin, accounting for approximately half of the protein content in adult central nervous system myelin. Mutations in the gene encoding PLP1 are associated with Pelizaeus-Merzbacher disease (PMD), a severe neurological disorder that affects myelination in the brain and leads to significant developmental challenges.