- Mutations in the FKRP gene can cause muscle-eye-brain disease and Walker-Warburg syndrome. Beltran-Valero de Bernabé, D., Voit, T., Longman, C., Steinbrecher, A., Straub, V., Yuva, Y., Herrmann, R., Sperner, J., Korenke, C., Diesen, C., Dobyns, W.B., Brunner, H.G., van Bokhoven, H., Brockington, M., Muntoni, F. J. Med. Genet. (2004)