Mutations in PRKCSH, encoding the beta-subunit of glucosidase II, an N-linked glycan-processing enzyme in the endoplasmic reticulum (ER), cause autosomal dominant polycystic liver disease. We found that mutations in SEC63, encoding a component of the protein translocation machinery in the ER, also cause this disease. These findings are suggestive of a role for cotranslational protein-processing pathways in maintaining epithelial luminal structure and implicate noncilial ER proteins in human polycystic disease.
Davila, S., Furu, L., Gharavi, A. G., Tian, X., Onoe, T., Qian, Q., Li, A., Cai, Y., Kamath, P. S., King, B. F., Azurmendi, P. J., Tahvanainen, P., Kääriäinen, H., Höckerstedt, K., Devuyst, O., Pirson, Y., Martin, R. S., Lifton, R. P., Tahvanainen, E., et al. (2004). Mutations in SEC63 cause autosomal dominant polycystic liver disease. Nature Genetics, 36(6), 575-577. https://doi.org/10.1038/ng1357 (Original work published 2004)