Dehydrodolichyl diphosphate synthase

Dehydrodolichyl diphosphate synthase subunit
Identifiers
Symbols DHDDS ; CIT; CPT; DS; HDS; RP59
External IDs OMIM: 608172 MGI: 1914672 HomoloGene: 32615 GeneCards: DHDDS Gene
EC number 2.5.1.87
RNA expression pattern
More reference expression data
Orthologs
Species Human Mouse
Entrez 79947 67422
Ensembl ENSG00000117682 ENSMUSG00000012117
UniProt Q86SQ9 Q99KU1
RefSeq (mRNA) NM_001243564 NM_026144
RefSeq (protein) NP_001230493 NP_080420
Location (UCSC) Chr 1:
26.43 – 26.47 Mb
Chr 4:
133.97 – 134 Mb
PubMed search

Dehydrodolichyl diphosphate synthase is an enzyme that in humans is encoded by the DHDDS gene.[1][2]

Function

Dehydrodolichyl diphosphate (dedol-PP) synthase catalyzes cis-prenyl chain elongation to produce the polyprenyl backbone of dolichol, a glycosyl carrier lipid required for the biosynthesis of several classes of glycoproteins.[2]

Clinical significance

It has been suggested that missense mutations in the DHDDS gene are responsible for certain variants of retinitis pigmentosa.[3] Since it is involved in the early steps of dolichol synthesis, vital e.g. for correct N-glycosylation, a disease caused by mutations in DHDDS should be considered a congenital disorder of glycosylation (and namned DHDDS-CDG according to the novel nomenclature of CDGs).[4] Interestingly, many CDG subtypes present with retinitis pigmentosa as a major feature.[5]

References

  1. Endo S, Zhang YW, Takahashi S, Koyama T (Feb 2003). "Identification of human dehydrodolichyl diphosphate synthase gene". Biochim Biophys Acta 1625 (3): 291–5. doi:10.1016/S0167-4781(02)00628-0. PMID 12591616.
  2. 1 2 "Entrez Gene: DHDDS dehydrodolichyl diphosphate synthase".
  3. Zelinger L, Banin E, Obolensky A, Mizrahi-Meissonnier L, Beryozkin A, Bandah-Rozenfeld D, Frenkel S, Ben-Yosef T, Merin S, Schwartz SB, Cideciyan AV, Jacobson SG, Sharon D (February 2011). "A missense mutation in DHDDS, encoding dehydrodolichyl diphosphate synthase, is associated with autosomal-recessive retinitis pigmentosa in Ashkenazi Jews". Am. J. Hum. Genet. 88 (2): 207–15. doi:10.1016/j.ajhg.2011.01.002. PMC 3035703. PMID 21295282.
  4. Jaeken J, Hennet T, Matthijs G, Freeze HH (September 2009). "CDG nomenclature: time for a change!". Biochim. Biophys. Acta 1792 (9): 825–6. doi:10.1016/j.bbadis.2009.08.005. PMID 19765534.
  5. Freeze HH, Eklund EA, Ng BG, Patterson MC (May 2012). "Neurology of inherited glycosylation disorders". Lancet Neurol. 11 (5): 453–66. doi:10.1016/S1474-4422(12)70040-6. PMID 22516080.

Further reading

External links

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