Hereditary sensory neuropathy type 1 (HSN1, MIM 162400; ref. 1) genetically
maps to chromosome 9q22 (refs. 2-4). We report here that the gene encoding
a sub-unit of serine palmitoyltransferase is located within the HSN1 locus
, expressed in dorsal root ganglia (DRG) and mutated in HSN1.