CDP-L-ribitol pyrophosphorylase A
Last updated 18 Aug 2020
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The CRPPA gene provides instructions for making a protein that is involved in a process called glycosylation. Through this chemical process, sugar molecules are added to certain proteins. In particular, the CRPPA protein helps produce a molecule called ribitol 5-phosphate, which is an important component of the chain of sugar molecules added to a protein called alpha (α)-dystroglycan. Glycosylation is critical for the normal function of α-dystroglycan.
Normal function
The CRPPA gene provides instructions for making a protein that is involved in a process called glycosylation. Through this chemical process, sugar molecules are added to certain proteins. In particular, the CRPPA protein helps produce a molecule called ribitol 5-phosphate, which is an important component of the chain of sugar molecules added to a protein called alpha (α)-dystroglycan. Glycosylation is critical for the normal function of α-dystroglycan.
The α-dystroglycan protein helps anchor the structural framework inside each cell (cytoskeleton) to the lattice of proteins and other molecules outside the cell (extracellular matrix). In skeletal muscles, glycosylated α-dystroglycan helps stabilize and protect muscle fibers. In the brain, it helps direct the movement (migration) of nerve cells (neurons) during early development.
Conditions referring to this gene or chromosome
Other names
2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase-like protein
4-diphosphocytidyl-2C-methyl-D-erythritol synthase homolog
hCG_1745121
isoprenoid synthase domain containing
isoprenoid synthase domain-containing protein
ISPD
IspD
ISPD_HUMAN
MDDGA7
Nip
notch1-induced protein
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Further reading and references
- CDP-L-ribitol pyrophosphorylase A; MedlinePlus, National Library of Medicine.
- Cirak S, Foley AR, Herrmann R, Willer T, Yau S, Stevens E, Torelli S, Brodd L, Kamynina A, Vondracek P, Roper H, Longman C, Korinthenberg R, Marrosu G, Nurnberg P; UK10K Consortium; Michele DE, Plagnol V, Hurles M, Moore SA, Sewry CA, Campbell KP, Voit T, Muntoni F. ISPD gene mutations are a common cause of congenital and limb-girdle muscular dystrophies. Brain. 2013 Jan;136(Pt 1):269-81. doi: 10.1093/brain/aws312. Epub 2013 Jan 3.
- Gerin I, Ury B, Breloy I, Bouchet-Seraphin C, Bolsee J, Halbout M, Graff J, Vertommen D, Muccioli GG, Seta N, Cuisset JM, Dabaj I, Quijano-Roy S, Grahn A, Van Schaftingen E, Bommer GT. ISPD produces CDP-ribitol used by FKTN and FKRP to transfer ribitol phosphate onto alpha-dystroglycan. Nat Commun. 2016 May 19;7:11534. doi: 10.1038/ncomms11534.
- Kanagawa M, Kobayashi K, Tajiri M, Manya H, Kuga A, Yamaguchi Y, Akasaka-Manya K, Furukawa JI, Mizuno M, Kawakami H, Shinohara Y, Wada Y, Endo T, Toda T. Identification of a Post-translational Modification with Ribitol-Phosphate and Its Defect in Muscular Dystrophy. Cell Rep. 2016 Mar 8;14(9):2209-2223. doi: 10.1016/j.celrep.2016.02.017. Epub 2016 Feb 25.
- Roscioli T, Kamsteeg EJ, Buysse K, Maystadt I, van Reeuwijk J, van den Elzen C, van Beusekom E, Riemersma M, Pfundt R, Vissers LE, Schraders M, Altunoglu U, Buckley MF, Brunner HG, Grisart B, Zhou H, Veltman JA, Gilissen C, Mancini GM, Delree P, Willemsen MA, Ramadza DP, Chitayat D, Bennett C, Sheridan E, Peeters EA, Tan-Sindhunata GM, de Die-Smulders CE, Devriendt K, Kayserili H, El-Hashash OA, Stemple DL, Lefeber DJ, Lin YY, van Bokhoven H. Mutations in ISPD cause Walker-Warburg syndrome and defective glycosylation of alpha-dystroglycan. Nat Genet. 2012 May;44(5):581-5. doi: 10.1038/ng.2253.
- Tasca G, Moro F, Aiello C, Cassandrini D, Fiorillo C, Bertini E, Bruno C, Santorelli FM, Ricci E. Limb-girdle muscular dystrophy with alpha-dystroglycan deficiency and mutations in the ISPD gene. Neurology. 2013 Mar 5;80(10):963-5. doi: 10.1212/WNL.0b013e3182840cbc. Epub 2013 Feb 6. No abstract available.
- Willer T, Lee H, Lommel M, Yoshida-Moriguchi T, de Bernabe DB, Venzke D, Cirak S, Schachter H, Vajsar J, Voit T, Muntoni F, Loder AS, Dobyns WB, Winder TL, Strahl S, Mathews KD, Nelson SF, Moore SA, Campbell KP. ISPD loss-of-function mutations disrupt dystroglycan O-mannosylation and cause Walker-Warburg syndrome. Nat Genet. 2012 May;44(5):575-80. doi: 10.1038/ng.2252.
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