Dehydrodolichyl diphosphate synthase complex subunit NUS1

Definition

With DHDDS, forms the dehydrodolichyl diphosphate synthase (DDS) complex, an essential component of the dolichol monophosphate (Dol-P) biosynthetic machinery. Both subunits contribute to enzymatic activity, i.e. condensation of multiple copies of isopentenyl pyrophosphate (IPP) to farnesyl pyrophosphate (FPP) to produce dehydrodolichyl diphosphate (Dedol-PP), a precursor of dolichol phosphate which is utilized as a sugar carrier in protein glycosylation in the endoplasmic reticulum (ER). Synthesizes long-chain polyprenols, mostly of C95 and C100 chain length. Regulates the glycosylation and stability of nascent NPC2, thereby promoting trafficking of LDL-derived cholesterol. Acts as a specific receptor for the N-terminus of Nogo-B, a neural and cardiovascular regulator.

References:

[1]. Kenneth D Harrison, et al. Nogo-B receptor is necessary for cellular dolichol biosynthesis and protein N-glycosylation. EMBO J. 2011 May 13;30(12):2490-500. [Content Brief]

[2]. Eon Joo Park, et al. Mutation of Nogo-B receptor, a subunit of cis-prenyltransferase, causes a congenital disorder of glycosylation. Cell Metab. 2014 Sep 2;20(3):448-57. [Content Brief]

[3]. Robert Qing Miao, et al. Identification of a receptor necessary for Nogo-B stimulated chemotaxis and morphogenesis of endothelial cells. Proc Natl Acad Sci U S A. 2006 Jul 18;103(29):10997-1002. [Content Brief]

[4]. Kariona A Grabińska, et al. A conserved C-terminal R X G motif in the NgBR subunit of cis-prenyltransferase is critical for prenyltransferase activity. J Biol Chem. 2017 Oct 20;292(42):17351-17361. [Content Brief]

[5]. Ban H Edani, et al. Structural elucidation of the cis-prenyltransferase NgBR/DHDDS complex reveals insights in regulation of protein glycosylation. Proc Natl Acad Sci U S A. 2020 Aug 25;117(34):20794-20802. [Content Brief]

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