2021
Progressive myoclonus epilepsies—Residual unsolved cases have marked genetic heterogeneity including dolichol-dependent protein glycosylation pathway genes
Courage C, Oliver KL, Park EJ, Cameron JM, Grabińska KA, Muona M, Canafoglia L, Gambardella A, Said E, Afawi Z, Baykan B, Brandt C, di Bonaventura C, Chew HB, Criscuolo C, Dibbens LM, Castellotti B, Riguzzi P, Labate A, Filla A, Giallonardo AT, Berecki G, Jackson CB, Joensuu T, Damiano JA, Kivity S, Korczyn A, Palotie A, Striano P, Uccellini D, Giuliano L, Andermann E, Scheffer IE, Michelucci R, Bahlo M, Franceschetti S, Sessa WC, Berkovic SF, Lehesjoki AE. Progressive myoclonus epilepsies—Residual unsolved cases have marked genetic heterogeneity including dolichol-dependent protein glycosylation pathway genes. American Journal Of Human Genetics 2021, 108: 722-738. PMID: 33798445, PMCID: PMC8059372, DOI: 10.1016/j.ajhg.2021.03.013.Peer-Reviewed Original ResearchConceptsPME genesProgressive myoclonus epilepsyWhole-exome sequencingPrevious genetic analysisGroup of genesVariety of proteinsPrevious disease associationsUnrelated individualsCopy number changesProtein glycosylationPathway genesEndosomal functionGenetic analysisDisease-causing variantsGenesLikely disease-causing variantsAdditional family membersGenetic heterogeneityHeterogeneous rare diseasesUnsolved casesDisease associationsNovel causeMyoclonus epilepsyHeterozygous variantsHomozygous variant
2020
Structural elucidation of the cis-prenyltransferase NgBR/DHDDS complex reveals insights in regulation of protein glycosylation
Edani BH, Grabińska KA, Zhang R, Park EJ, Siciliano B, Surmacz L, Ha Y, Sessa WC. Structural elucidation of the cis-prenyltransferase NgBR/DHDDS complex reveals insights in regulation of protein glycosylation. Proceedings Of The National Academy Of Sciences Of The United States Of America 2020, 117: 20794-20802. PMID: 32817466, PMCID: PMC7456142, DOI: 10.1073/pnas.2008381117.Peer-Reviewed Original ResearchConceptsActive site tunnelProtein glycosylationAtomic resolution structuresGlycosyl carrier lipidsΑ3 helixEnzyme active sitePTase activityResolution structureActive siteEndoplasmic reticulumHomodimeric formCarrier lipidRate-limiting stepGlycosylationCrystal structureDHDDSStructural elucidationPTaseIsoprene chainPrenyltransferaseUnique insightsComplexesUnfavorable stateNgBRHomodimeric
2016
NgBR is essential for endothelial cell glycosylation and vascular development
Park EJ, Grabińska K, Guan Z, Sessa WC. NgBR is essential for endothelial cell glycosylation and vascular development. EMBO Reports 2016, 17: 167-177. PMID: 26755743, PMCID: PMC5290814, DOI: 10.15252/embr.201540789.Peer-Reviewed Original ResearchConceptsVascular developmentCis-prenyltransferase activityEmbryonic lethalityKnockout embryosProtein glycosylationTransmembrane proteinDefective glycosylationCell glycosylationEndothelial cellsDevelopment defectsKnockout resultsNgBRDolichol phosphateVE-cadherinGlycosylationYolk sacProteinEndothelial proteinsCellsIntegrated roleEmbryogenesisSubunitsEmbryosApoptosisEnd products
2014
Mutation of Nogo-B Receptor, a Subunit of cis-Prenyltransferase, Causes a Congenital Disorder of Glycosylation
Park EJ, Grabińska K, Guan Z, Stránecký V, Hartmannová H, Hodaňová K, Barešová V, Sovová J, Jozsef L, Ondrušková N, Hansíková H, Honzík T, Zeman J, Hůlková H, Wen R, Kmoch S, Sessa WC. Mutation of Nogo-B Receptor, a Subunit of cis-Prenyltransferase, Causes a Congenital Disorder of Glycosylation. Cell Metabolism 2014, 20: 448-457. PMID: 25066056, PMCID: PMC4161961, DOI: 10.1016/j.cmet.2014.06.016.Peer-Reviewed Original ResearchConceptsProtein glycosylationCis-prenyltransferaseGPI anchor biosynthesisDolichol synthesisSynthesis of dolicholO-mannosylationAnchor biosynthesisFirst enzymeGenetic basisC-terminusCongenital disorderFunction mutationsGlycosylationEssential roleEnhanced accumulationMutationsYeastNgBRSubunitsDolicholFibroblastsBiosynthesisTerminusFree cholesterolProtein