REEP1Receptor expression-enhancing protein 1 is a protein that in humans is encoded by the REEP1 gene.Clinical significanceMutations in REEP1 are known to cause the following conditions: Spastic paraplegia 31, autosomal dominant ; Neuronopathy, distal hereditary motor, 5B ; Distal spinal muscular atrophy, autosomal recessive, 6.