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Also known as: P0; CHM; DSS; MPP; CHN2; CMT1; CMT1B; CMT2I; CMT2J; CMT4E; CMTDI3; CMTDID; HMSNIB<br />This gene is specifically expressed in Schwann cells of the peripheral nervous system and encodes a type I transmembrane glycoprotein that is the major structural protein of the peripheral myelin sheath. The encoded protein contains a large hydrophobic extracellular domain and a small essential intracellular domain, which are essential for the formation and stabilization of the multilayered structure of dense myelin. Mutations in this gene are associated with autosomal dominant type 1 charco-marie-tooth disease (CMT1B) and other polyneuropathy such as Dejerine-Sottas syndrome (DSS) and congenital myelinating neuropathy (CHN). A recent study showed that two isoforms can be generated from the same mRNA by the stop codon reading mechanism using an in-frame translation stop codon.