Glycoform-Selective Prion Formation in Sporadic and Familial Forms of Prion Disease

Xiangzhu Xiao, Jue Yuan, Stéphane Haïk, Ignazio Cali, Yian Zhan, Mohammed Moudjou, Baiya Li, Jean Louis Laplanche, Hubert Laude, Jan Langeveld, Pierluigi Gambetti, Tetsuyuki Kitamoto, Qingzhong Kong, Jean Philippe Brandel, Brian A. Cobb, Robert B. Petersen, Wen Quan Zou

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Abstract

The four glycoforms of the cellular prion protein (PrPC) variably glycosylated at the two N-linked glycosylation sites are converted into their pathological forms (PrPSc) in most cases of sporadic prion diseases. However, a prominent molecular characteristic of PrPSc in the recently identified variably protease-sensitive prionopathy (VPSPr) is the absence of a diglycosylated form, also notable in familial Creutzfeldt-Jakob disease (fCJD), which is linked to mutations in PrP either from Val to Ile at residue 180 (fCJDV180I) or from Thr to Ala at residue 183 (fCJDT183A). Here we report that fCJDV180I, but not fCJDT183A, exhibits a proteinase K (PK)-resistant PrP (PrPres) that is markedly similar to that observed in VPSPr, which exhibits a five-step ladder-like electrophoretic profile, a molecular hallmark of VPSPr. Remarkably, the absence of the diglycosylated PrPres species in both fCJDV180I and VPSPr is likewise attributable to the absence of PrPres glycosylated at the first N-linked glycosylation site at residue 181, as in fCJDT183A. In contrast to fCJDT183A, both VPSPr and fCJDV180I exhibit glycosylation at residue 181 on di- and monoglycosylated (mono181) PrP prior to PK-treatment. Furthermore, PrPV180I with a typical glycoform profile from cultured cells generates detectable PrPres that also contains the diglycosylated PrP in addition to mono- and unglycosylated forms upon PK-treatment. Taken together, our current in vivo and in vitro studies indicate that sporadic VPSPr and familial CJDV180I share a unique glycoform-selective prion formation pathway in which the conversion of diglycosylated and mono181 PrPC to PrPSc is inhibited, probably by a dominant-negative effect, or by other co-factors.

Original languageEnglish
Article numbere58786
JournalPloS one
Volume8
Issue number3
DOIs
Publication statusPublished - 2013 Mar 19

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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    Xiao, X., Yuan, J., Haïk, S., Cali, I., Zhan, Y., Moudjou, M., Li, B., Laplanche, J. L., Laude, H., Langeveld, J., Gambetti, P., Kitamoto, T., Kong, Q., Brandel, J. P., Cobb, B. A., Petersen, R. B., & Zou, W. Q. (2013). Glycoform-Selective Prion Formation in Sporadic and Familial Forms of Prion Disease. PloS one, 8(3), [e58786]. https://doi.org/10.1371/journal.pone.0058786