This technology includes the creation and use of a mouse anti-Atlastin-1 monoclonal antibody (3194, IgG1). Mutations in Atlastin-1 are commonly found in hereditary spastic paraplegia, SPG3A. In addition, this protein is conserved in all eukaryotes, and it mediates fusion of endoplasmic reticulum tubules in cells, giving it its characteristic polygonal appearance. Thus, this protein is of interest to both those interested in disease pathogenesis and those studying basic cell biology.