Matthew P Wilson, Takfarinas Kentache, Charlotte R Althoff, Céline Schulz, Geoffroy de Bettignies, Gisèle Mateu Cabrera, Loreta Cimbalistiene, Birute Burnyte, Grace Yoon, Gregory Costain, Sandrine Vuillaumier-Barrot, David Cheillan, Daisy Rymen, Lucie Rychtarova, Hana Hansikova, Marina Bury, Joseph P Dewulf, Francesco Caligiore, Jaak Jaeken, Vincent Cantagrel, Emile Van Schaftingen, Gert Matthijs, François Foulquier, Guido T Bommer
Dolichol is a lipid critical for N-glycosylation as a carrier for activated sugars and nascent oligosaccharides. It is commonly thought to be directly produced from polyprenol by the enzyme SRD5A3. Instead, we found that dolichol synthesis requires a three-step detour involving additional metabolites, where SRD5A3 catalyzes only the second reaction. The first and third steps are performed by DHRSX, whose gene resides on the pseudoautosomal regions of the X and Y chromosomes. Accordingly, we report a pseudoautosomal-recessive disease presenting as a congenital disorder of glycosylation in patients with missense variants in DHRSX (DHRSX-CDG)...
May 22, 2024: Cell