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Wilson MP, Kentache T, Althoff CR, Schulz C, de Bettignies G, Mateu Cabrera G, Cimbalistiene L, Burnyte B, Yoon G, Costain G, Vuillaumier-Barrot S, Cheillan D, Rymen D, Rychtarova L, Hansikova H, Bury M, Dewulf JP, Caligiore F, Jaeken J, Cantagrel V, Van Schaftingen E, Matthijs G, Foulquier F, Bommer GT. A pseudoautosomal glycosylation disorder prompts the revision of dolichol biosynthesis. Cell 2024; 187:3585-3601.e22. [PMID: 38821050 PMCID: PMC11250103 DOI: 10.1016/j.cell.2024.04.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 02/21/2024] [Accepted: 04/29/2024] [Indexed: 06/02/2024]
Abstract
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). Of note, DHRSX has a unique dual substrate and cofactor specificity, allowing it to act as a NAD+-dependent dehydrogenase and as a NADPH-dependent reductase in two non-consecutive steps. Thus, our work reveals unexpected complexity in the terminal steps of dolichol biosynthesis. Furthermore, we provide insights into the mechanism by which dolichol metabolism defects contribute to disease.
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Affiliation(s)
- Matthew P Wilson
- Laboratory for Molecular Diagnosis, Center for Human Genetics, KU Leuven, Leuven, Belgium
| | - Takfarinas Kentache
- Metabolic Research Group, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium; WELBIO Department, WEL Research Institute, Wavre, Belgium
| | - Charlotte R Althoff
- Laboratory for Molecular Diagnosis, Center for Human Genetics, KU Leuven, Leuven, Belgium; Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, 59000 Lille, France
| | - Céline Schulz
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, 59000 Lille, France
| | - Geoffroy de Bettignies
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, 59000 Lille, France
| | - Gisèle Mateu Cabrera
- Laboratory for Molecular Diagnosis, Center for Human Genetics, KU Leuven, Leuven, Belgium
| | - Loreta Cimbalistiene
- Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - Birute Burnyte
- Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - Grace Yoon
- Division of Clinical and Metabolic Genetics, Hospital for Sick Children, Toronto, ON, Canada; Division of Neurology, Hospital for Sick Children, Toronto, ON, Canada; Department of Paediatrics, University of Toronto, Toronto, ON, Canada
| | - Gregory Costain
- Division of Clinical and Metabolic Genetics, Hospital for Sick Children, Toronto, ON, Canada; Department of Paediatrics, University of Toronto, Toronto, ON, Canada; Program in Genetics and Genome Biology, SickKids Research Institute, Toronto, ON, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Sandrine Vuillaumier-Barrot
- AP-HP, Biochimie Métabolique et Cellulaire and Département de Génétique, Hôpital Bichat-Claude Bernard, and Université de Paris, Faculté de Médecine Xavier Bichat, INSERM U1149, CRI, Paris, France
| | - David Cheillan
- Service Biochimie et Biologie Moléculaire - Hospices Civils de Lyon; Laboratoire Carmen - Inserm U1060, INRAE UMR1397, Université Claude Bernard Lyon 1, Lyon, France
| | - Daisy Rymen
- Department of Pediatrics, Center for Metabolic Diseases, University Hospitals Leuven, Leuven, Belgium
| | - Lucie Rychtarova
- Laboratory for Study of Mitochondrial Disorders, Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine and General University Hospital in Prague, Charles University, Prague, Czechia
| | - Hana Hansikova
- Laboratory for Study of Mitochondrial Disorders, Department of Paediatrics and Inherited Metabolic Disorders, First Faculty of Medicine and General University Hospital in Prague, Charles University, Prague, Czechia
| | - Marina Bury
- Metabolic Research Group, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium; WELBIO Department, WEL Research Institute, Wavre, Belgium
| | - Joseph P Dewulf
- Metabolic Research Group, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium; WELBIO Department, WEL Research Institute, Wavre, Belgium
| | - Francesco Caligiore
- Metabolic Research Group, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium; WELBIO Department, WEL Research Institute, Wavre, Belgium
| | - Jaak Jaeken
- Department of Pediatrics, Center for Metabolic Diseases, University Hospitals Leuven, Leuven, Belgium
| | - Vincent Cantagrel
- Developmental Brain Disorders Laboratory, Université Paris Cité, INSERM UMR1163, Imagine Institute, Paris, France
| | - Emile Van Schaftingen
- Metabolic Research Group, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium; WELBIO Department, WEL Research Institute, Wavre, Belgium.
| | - Gert Matthijs
- Laboratory for Molecular Diagnosis, Center for Human Genetics, KU Leuven, Leuven, Belgium.
| | - François Foulquier
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, 59000 Lille, France.
| | - Guido T Bommer
- Metabolic Research Group, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium; WELBIO Department, WEL Research Institute, Wavre, Belgium.
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Yang F, Wen X, Xie S, He X, Qu G, Zhang X, Sun S, Luo Z, Liu Z, Lin Q. Characterization of lipid composition and nutritional quality of yak ghee at different altitudes: A quantitative lipidomic analysis. Food Chem X 2024; 21:101166. [PMID: 38322764 PMCID: PMC10844969 DOI: 10.1016/j.fochx.2024.101166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/15/2024] [Accepted: 01/27/2024] [Indexed: 02/08/2024] Open
Abstract
Efficient and comprehensive analysis of lipid profiles in yak ghee samples collected from different elevations is crucial for optimal utilization of these resources. Unfortunately, such research is relatively rare. Yak ghee collected from three locations at different altitudes (S2: 2986 m; S5: 3671 m; S6: 4508 m) were analyzed by quantitative lipidomic. Our analysis identified a total of 176 lipids, and 147 s lipid of them were upregulated and 29 lipids were downregulated. These lipids have the potential to serve as biomarkers for distinguishing yak ghee from different altitudes. Notably, S2 exhibited higher levels of fatty acids (21:1) and branched fatty acid esters of hydroxy fatty acids (14:0/18:0), while S5 showed increased levels of phosphatidylserine (O-20:0/19:1) and glycerophosphoric acid (19:0/22:1). S6 displayed higher levels of triacylglycerol (17:0/20:5/22:3), ceramide alpha-hydroxy fatty acid-sphingosine (d17:3/34:2), and acyl glucosylceramides (16:0-18:0-18:1). Yak ghee exhibited a high content of neutralizing glycerophospholipids and various functional lipids, including sphingolipids and 21 newly discovered functional lipids. Our findings provide insights into quantitative changes in yak ghee lipids during different altitudes, development of yak ghee products, and screening of potential biomarkers.
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Affiliation(s)
- Feiyan Yang
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Changsha Engineering Research Center of Food Storage and Preservation, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
| | - Xin Wen
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Changsha Engineering Research Center of Food Storage and Preservation, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
| | - Siwei Xie
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Changsha Engineering Research Center of Food Storage and Preservation, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
| | - Xudong He
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Changsha Engineering Research Center of Food Storage and Preservation, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
| | - Guangfan Qu
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Changsha Engineering Research Center of Food Storage and Preservation, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
| | - Xueying Zhang
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Changsha Engineering Research Center of Food Storage and Preservation, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
| | - Shuguo Sun
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Changsha Engineering Research Center of Food Storage and Preservation, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
| | - Zhang Luo
- College of Food Science, Tibet Agriculture & Animal Husbandry University, Nyingchi 860000, Tibet, China
| | - Zhendong Liu
- College of Food Science, Tibet Agriculture & Animal Husbandry University, Nyingchi 860000, Tibet, China
| | - Qinlu Lin
- Hunan Key Laboratory of Processed Food for Special Medical Purpose, Changsha Engineering Research Center of Food Storage and Preservation, College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
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Zimbres FM, Merino EF, Butschek GJ, Butler JH, Ducongé F, Cassera MB. Aptamer-Based Imaging of Polyisoprenoids in the Malaria Parasite. Molecules 2023; 29:178. [PMID: 38202761 PMCID: PMC10780415 DOI: 10.3390/molecules29010178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024] Open
Abstract
Dolichols are isoprenoid end-products of the mevalonate and 2C-methyl-D-erythritol-4-phosphate pathways. The synthesis of dolichols is initiated with the addition of several molecules of isopentenyl diphosphate to farnesyl diphosphate. This reaction is catalyzed by a cis-prenyltransferase and leads to the formation of polyprenyl diphosphate. Subsequent steps involve the dephosphorylation and reduction of the α-isoprene unit by a polyprenol reductase, resulting in the generation of dolichol. The size of the dolichol varies, depending on the number of isoprene units incorporated. In eukaryotes, dolichols are synthesized as a mixture of four or more different lengths. Their biosynthesis is predicted to occur in the endoplasmic reticulum, where dolichols play an essential role in protein glycosylation. In this study, we have developed a selection of aptamers targeting dolichols and enhanced their specificity by incorporating fatty acids for negative selection. One aptamer showed high enrichment and specificity for linear polyisoprenoids containing at least one oxygen atom, such as an alcohol or aldehyde, in the α-isoprene unit. The selected aptamer proved to be a valuable tool for the subcellular localization of polyisoprenoids in the malaria parasite. To the best of our knowledge, this is the first time that polyisoprenoids have been localized within a cell using aptamer-based imaging techniques.
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Affiliation(s)
- Flavia M. Zimbres
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA 30602, USA
- Center for Tropical and Emerging Global Diseases (CTEGD), University of Georgia, Athens, GA 30602, USA
| | - Emilio F. Merino
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA 30602, USA
- Center for Tropical and Emerging Global Diseases (CTEGD), University of Georgia, Athens, GA 30602, USA
| | - Grant J. Butschek
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA 30602, USA
- Center for Tropical and Emerging Global Diseases (CTEGD), University of Georgia, Athens, GA 30602, USA
| | - Joshua H. Butler
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA 30602, USA
- Center for Tropical and Emerging Global Diseases (CTEGD), University of Georgia, Athens, GA 30602, USA
| | - Frédéric Ducongé
- French Atomic Energy Commission (CEA), Fundamental Research Division (DRF), Institute of Biology François Jacob (Jacob), Molecular Imaging Research Center, 92265 Fontenay-aux-Roses, France
- Neurodegenerative Diseases Laboratory, CNRS CEA UMR 9199, 92265 Fontenay-aux-Roses, France
- Paris-Saclay University, 92265 Fontenay-aux-Roses, France
| | - Maria B. Cassera
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA 30602, USA
- Center for Tropical and Emerging Global Diseases (CTEGD), University of Georgia, Athens, GA 30602, USA
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Nguyen MN, Chakraborty D, Rao SR, Onysk A, Radkiewicz M, Surmacz L, Swiezewska E, Soubeyrand E, Akhtar TA, Kraft TW, Sherry DM, Fliesler SJ, Pittler SJ. A Dhdds K42E knock-in RP59 mouse model shows inner retina pathology and defective synaptic transmission. Cell Death Dis 2023; 14:420. [PMID: 37443173 PMCID: PMC10345138 DOI: 10.1038/s41419-023-05936-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 06/07/2023] [Accepted: 06/29/2023] [Indexed: 07/15/2023]
Abstract
Retinitis pigmentosa (RP) defines a group of hereditary progressive rod-cone degenerations that exhibit a common phenotype caused by variants in over 70 genes. While most variants in the dehydrodolichyl diphosphate synthase (DHDDS) gene result in syndromic abnormalities, some variants cause non-syndromic RP (RP59). DHDDS encodes one subunit of the enzyme cis-prenyltransferase (CPT), which is required for the synthesis of dolichol (Dol), that is a necessary protein glycosylation cofactor. We previously reported the creation and initial characterization of a knock-in (KI) mouse model harboring the most prevalent RP59-associated DHDDS variant (K42E) to understand how defects in DHDDS lead to retina-specific pathology. This model exhibited no profound retinal degeneration, nor protein N-glycosylation defects. Here, we report that the Dol isoprenylogue species in retina, liver, and brain of the K42E mouse model are statistically shorter than in the corresponding tissues of age-matched controls, as reported in blood and urine of RP59 patients. Retinal transcriptome analysis demonstrated elevation of many genes encoding proteins involved in synaptogenesis and synaptic function. Quantitative retinal cell layer thickness measurements demonstrated a significant reduction in the inner nuclear layer (INL) and total retinal thickness (TRT) beginning at postnatal (PN) ∼2 months, progressively increasing to PN 18-mo. Histological analysis revealed cell loss in the INL, outer plexiform layer (OPL) disruption, and ectopic localization of outer nuclear layer (ONL) nuclei into the OPL of K42E mutant retinas, relative to controls. Electroretinograms (ERGs) of mutant mice exhibited reduced b-wave amplitudes beginning at PN 1-mo, progressively declining through PN 18-mo, without appreciable a-wave attenuation, relative to controls. Our results suggest that the underlying cause of DHDDS K42E variant driven RP59 retinal pathology is defective synaptic transmission from outer to inner retina.
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Affiliation(s)
- Mai N Nguyen
- Department of Optometry and Vision Science, Vision Science Research Center, School of Optometry, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Dibyendu Chakraborty
- Department of Optometry and Vision Science, Vision Science Research Center, School of Optometry, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Sriganesh Ramachandra Rao
- Research Service, VA Western New York Healthcare System, Buffalo, NY, 14215, USA
- Departments of Ophthalmology and Biochemistry and Neuroscience Graduate Program, Jacobs School of Medicine and Biomedical Sciences, The State University of New York, University at Buffalo, Buffalo, NY, 14203, USA
| | - Agnieszka Onysk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, 02106, Poland
| | - Mariusz Radkiewicz
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, 02106, Poland
| | - Liliana Surmacz
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, 02106, Poland
| | - Ewa Swiezewska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, 02106, Poland
| | - Eric Soubeyrand
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, N1G2W1, Canada
| | - Tariq A Akhtar
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, N1G2W1, Canada
| | - Timothy W Kraft
- Department of Optometry and Vision Science, Vision Science Research Center, School of Optometry, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - David M Sherry
- Departments of Cell Biology, Neurosurgery, and Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
| | - Steven J Fliesler
- Research Service, VA Western New York Healthcare System, Buffalo, NY, 14215, USA
- Departments of Ophthalmology and Biochemistry and Neuroscience Graduate Program, Jacobs School of Medicine and Biomedical Sciences, The State University of New York, University at Buffalo, Buffalo, NY, 14203, USA
| | - Steven J Pittler
- Department of Optometry and Vision Science, Vision Science Research Center, School of Optometry, University of Alabama at Birmingham, Birmingham, AL, 35294, USA.
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Lv T, Fu JX, Liu XY, Tang R, Yang GL. Case analysis of epilepsy, neurodevelopmental disorder, and motor disorders associated with mutations in the dehydrodolichyl diphosphate synthase gene. Seizure 2023; 110:126-135. [PMID: 37356182 DOI: 10.1016/j.seizure.2023.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 06/06/2023] [Accepted: 06/08/2023] [Indexed: 06/27/2023] Open
Abstract
The objective of this study is to analyze the role of dehydrodolichyl diphosphate synthase (DHDDS), a crucial enzyme in the mevalonate pathway, and its encoded mutations in the onset of developmental delay and seizures, with or without movement abnormalities. Its genotype-phenotype characteristics are still inconclusive. We analyzed the clinical characteristics of epilepsy, and neurodevelopmental and motor disorders related to DHDDS gene mutations and report the genotype-phenotype characteristics of a child with epilepsy caused by DHDDS gene mutation, providing a summary and a statistical analysis of epilepsy cases associated with DHDDS gene mutation up until February 2022. METHODS Using "DHDDS; epilepsy; neurodevelopmental disorder" as the keywords, the literature relevant to DHDDS gene mutations up until February 2022 was reviewed. A total of 25 cases were retrieved, among which 21 cases with complete data were included in the chi-squared test. The clinical characteristics of DHDDS gene-related cases were summarized and analyzed. RESULTS The onset of epilepsy caused by mutations of the DHDDS gene typically occurs during infancy. Predominantly, the mutation occurs in the locus of c.632G>A p.R211Q. Myoclonus is frequently the initial manifestation of epilepsy; it frequently coexists with neurodevelopmental disorder and intellectual disability, and patients have no specific type of motor disorder. Cranial magnetic resonance imaging (MRI) reveals no abnormalities, whereas electroencephalogram (EEG) frequently exhibits abnormalities. Valproic acid (VPA) yields good curative effects. CONCLUSION Mutations in the DHDDS gene are associated with congenital glycosylation disorder, autosomal recessive retinitis pigmentosa, and epilepsy. According to statistical analysis using the chi-squared test, for pediatric patients with mutations in this gene locus, most of the epilepsy types are myoclonic epilepsies with intellectual disability and neurodevelopmental disorders. They have normal brain MRIs and abnormal EEGs. VPA produces beneficial therapeutic results and the differences are all statistically significant. The current diagnosis still relies on next-generation sequencing or whole-exome sequencing.
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Affiliation(s)
- Ting Lv
- Department of Pediatrics, The Affiliated Hospital of Inner Mongolia Medical University, No. 1 North Channel Road, Inner Mongolia, Hohhot 010050, China
| | - Jun-Xian Fu
- Department of Pediatrics, The Affiliated Hospital of Inner Mongolia Medical University, No. 1 North Channel Road, Inner Mongolia, Hohhot 010050, China
| | - Xiao-Yang Liu
- Department of Pediatrics, The Affiliated Hospital of Inner Mongolia Medical University, No. 1 North Channel Road, Inner Mongolia, Hohhot 010050, China
| | - Rong Tang
- Department of Pediatrics, The Affiliated Hospital of Inner Mongolia Medical University, No. 1 North Channel Road, Inner Mongolia, Hohhot 010050, China
| | - Guang-Lu Yang
- Department of Pediatrics, The Affiliated Hospital of Inner Mongolia Medical University, No. 1 North Channel Road, Inner Mongolia, Hohhot 010050, China; Inner Mongolia Science and Technology Department, Inner Mongolia Autonomous Region nervous system disease clinical medical research center, No. 1 North Road, Huimin District, Hohhot 010050, China.
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Farooqi N, Rahman A, Ali Y, Ali K, Khan MEH, Jones DA, Abdelkarim M, Ullah F, Jalil F. Phylogenetic analysis of promoter regions of human Dolichol kinase (DOLK) and orthologous genes using bioinformatics tools. Open Life Sci 2023; 18:20220591. [PMID: 37250845 PMCID: PMC10224619 DOI: 10.1515/biol-2022-0591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/07/2023] [Accepted: 03/12/2023] [Indexed: 05/31/2023] Open
Abstract
The Dolichol kinase (DOLK) gene encodes the polytopic DOLK protein associated with the endoplasmic reticulum (ER) N-glycosylation pathway catalyzing the final step in the biosynthesis of dolichol phosphate. Dolichol phosphate is an oligosaccharide carrier required for N-glycosylation of DOLK protein, with its deficiency leading to a severe hypo glycosylation phenotype in humans which can cause congenital disorders of glycosylation and death in early infancy. The aim of the present study is to identify the phylogenetic relationship between human and ortholog species based on their conserved sequences in DOLK gene. Sequence alignment of DOLK was carried out in this study and the evolutionarily conserved regulatory sequences were identified using bioinformatics. Promoter sequence of human DOLK was compared with orthologous sequences from different organisms. Conserved non-coding sequences (CNS) and motifs in promoter regions were found by analyzing upstream promoter sequences of Homo sapiens DOLK and its orthologous genes in other organisms. Conserved sequences were predicted in the promoter regions in CNS1 and CNS2. Conserved protein sequences were also identified by alignment of the orthologous sequences. Organisms with similar gene sequences are assumed to be closely related and the ER N-glycosylation pathway is conserved in them.
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Affiliation(s)
- Nadia Farooqi
- Department of Zoology, Women Campus, University of Swat, 19120, Swat, Pakistan
| | - Ataur Rahman
- Department of Botany, Laboratory of Plant Ecology and Dendrochronology, University of Malakand, Khyber Pakhtunkhwa, Pakistan
| | - Yasir Ali
- Department of Biotechnology, Faculty of Chemical and Life Sciences, Abdul Wali Khan University Mardan, 23200, Mardan, Pakistan
| | - Kishwar Ali
- College of General Education, University of Doha for Science and Technology, Al Tarafa, Jelaiah Street, Duhail North, PO Box 24449Doha, Qatar
| | - Muhammad Ezaz Hasan Khan
- College of General Education, University of Doha for Science and Technology, Al Tarafa, Jelaiah Street, Duhail North, PO Box 24449Doha, Qatar
| | - David Aaron Jones
- College of Health Sciences, University of Doha for Science and Technology, Al Tarafa, Jelaiah Street, Duhail North, PO Box 24449Doha, Qatar
| | - Mouadh Abdelkarim
- College of General Education, University of Doha for Science and Technology, Al Tarafa, Jelaiah Street, Duhail North, PO Box 24449Doha, Qatar
| | - Farman Ullah
- Centre for Biotechnology and Microbiology, University of Swat, 19120, Swat, Pakistan
| | - Fazal Jalil
- Department of Biotechnology, Faculty of Chemical and Life Sciences, Abdul Wali Khan University Mardan, 23200, Mardan, Pakistan
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Larsen ISB, Povolo L, Zhou L, Tian W, Mygind KJ, Hintze J, Jiang C, Hartill V, Prescott K, Johnson CA, Mullegama SV, McConkie-Rosell A, McDonald M, Hansen L, Vakhrushev SY, Schjoldager KT, Clausen H, Worzfeld T, Joshi HJ, Halim A. The SHDRA syndrome-associated gene TMEM260 encodes a protein-specific O-mannosyltransferase. Proc Natl Acad Sci U S A 2023; 120:e2302584120. [PMID: 37186866 PMCID: PMC10214176 DOI: 10.1073/pnas.2302584120] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 04/21/2023] [Indexed: 05/17/2023] Open
Abstract
Mutations in the TMEM260 gene cause structural heart defects and renal anomalies syndrome, but the function of the encoded protein remains unknown. We previously reported wide occurrence of O-mannose glycans on extracellular immunoglobulin, plexin, transcription factor (IPT) domains found in the hepatocyte growth factor receptor (cMET), macrophage-stimulating protein receptor (RON), and plexin receptors, and further demonstrated that two known protein O-mannosylation systems orchestrated by the POMT1/2 and transmembrane and tetratricopeptide repeat-containing proteins 1-4 gene families were not required for glycosylation of these IPT domains. Here, we report that the TMEM260 gene encodes an ER-located protein O-mannosyltransferase that selectively glycosylates IPT domains. We demonstrate that disease-causing TMEM260 mutations impair O-mannosylation of IPT domains and that TMEM260 knockout in cells results in receptor maturation defects and abnormal growth of 3D cell models. Thus, our study identifies the third protein-specific O-mannosylation pathway in mammals and demonstrates that O-mannosylation of IPT domains serves critical functions during epithelial morphogenesis. Our findings add a new glycosylation pathway and gene to a growing group of congenital disorders of glycosylation.
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Affiliation(s)
- Ida Signe Bohse Larsen
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200Copenhagen N, Denmark
| | - Lorenzo Povolo
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200Copenhagen N, Denmark
| | - Luping Zhou
- Faculty of Medicine, Institute of Pharmacology, University of Marburg, 35043Marburg, Germany
| | - Weihua Tian
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200Copenhagen N, Denmark
| | - Kasper Johansen Mygind
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200Copenhagen N, Denmark
| | - John Hintze
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200Copenhagen N, Denmark
| | - Chen Jiang
- Faculty of Medicine, Institute of Pharmacology, University of Marburg, 35043Marburg, Germany
| | - Verity Hartill
- Leeds Institute of Medical Research, University of Leeds, St James’ University Hospital, LeedsLS2 9JT, United Kingdom
- Yorkshire Regional Genetics Service, Chapel Allerton Hospital, LeedsLS7 4SA, United Kingdom
| | - Katrina Prescott
- Yorkshire Regional Genetics Service, Chapel Allerton Hospital, LeedsLS7 4SA, United Kingdom
| | - Colin A. Johnson
- Leeds Institute of Medical Research, University of Leeds, St James’ University Hospital, LeedsLS2 9JT, United Kingdom
| | | | - Allyn McConkie-Rosell
- Division of Medical Genetics, Department of Pediatrics, Duke University Medical Center, Durham, NC27710
| | - Marie McDonald
- Division of Medical Genetics, Department of Pediatrics, Duke University Medical Center, Durham, NC27710
| | - Lars Hansen
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200Copenhagen N, Denmark
| | - Sergey Y. Vakhrushev
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200Copenhagen N, Denmark
| | - Katrine T. Schjoldager
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200Copenhagen N, Denmark
| | - Henrik Clausen
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200Copenhagen N, Denmark
| | - Thomas Worzfeld
- Faculty of Medicine, Institute of Pharmacology, University of Marburg, 35043Marburg, Germany
- Max-Planck-Institute for Heart and Lung Research, 61231Bad Nauheim, Germany
| | - Hiren J. Joshi
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200Copenhagen N, Denmark
| | - Adnan Halim
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, 2200Copenhagen N, Denmark
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8
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Galosi S, Edani BH, Martinelli S, Hansikova H, Eklund EA, Caputi C, Masuelli L, Corsten-Janssen N, Srour M, Oegema R, Bosch DGM, Ellis CA, Amlie-Wolf L, Accogli A, Atallah I, Averdunk L, Barañano KW, Bei R, Bagnasco I, Brusco A, Demarest S, Alaix AS, Di Bonaventura C, Distelmaier F, Elmslie F, Gan-Or Z, Good JM, Gripp K, Kamsteeg EJ, Macnamara E, Marcelis C, Mercier N, Peeden J, Pizzi S, Pannone L, Shinawi M, Toro C, Verbeek NE, Venkateswaran S, Wheeler PG, Zdrazilova L, Zhang R, Zorzi G, Guerrini R, Sessa WC, Lefeber DJ, Tartaglia M, Hamdan FF, Grabińska KA, Leuzzi V. De novo DHDDS variants cause a neurodevelopmental and neurodegenerative disorder with myoclonus. Brain 2022; 145:208-223. [PMID: 34382076 PMCID: PMC8967098 DOI: 10.1093/brain/awab299] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 07/03/2021] [Accepted: 07/16/2021] [Indexed: 11/12/2022] Open
Abstract
Subcellular membrane systems are highly enriched in dolichol, whose role in organelle homeostasis and endosomal-lysosomal pathway remains largely unclear besides being involved in protein glycosylation. DHDDS encodes for the catalytic subunit (DHDDS) of the enzyme cis-prenyltransferase (cis-PTase), involved in dolichol biosynthesis and dolichol-dependent protein glycosylation in the endoplasmic reticulum. An autosomal recessive form of retinitis pigmentosa (retinitis pigmentosa 59) has been associated with a recurrent DHDDS variant. Moreover, two recurring de novo substitutions were detected in a few cases presenting with neurodevelopmental disorder, epilepsy and movement disorder. We evaluated a large cohort of patients (n = 25) with de novo pathogenic variants in DHDDS and provided the first systematic description of the clinical features and long-term outcome of this new neurodevelopmental and neurodegenerative disorder. The functional impact of the identified variants was explored by yeast complementation system and enzymatic assay. Patients presented during infancy or childhood with a variable association of neurodevelopmental disorder, generalized epilepsy, action myoclonus/cortical tremor and ataxia. Later in the disease course, they experienced a slow neurological decline with the emergence of hyperkinetic and/or hypokinetic movement disorder, cognitive deterioration and psychiatric disturbances. Storage of lipidic material and altered lysosomes were detected in myelinated fibres and fibroblasts, suggesting a dysfunction of the lysosomal enzymatic scavenger machinery. Serum glycoprotein hypoglycosylation was not detected and, in contrast to retinitis pigmentosa and other congenital disorders of glycosylation involving dolichol metabolism, the urinary dolichol D18/D19 ratio was normal. Mapping the disease-causing variants into the protein structure revealed that most of them clustered around the active site of the DHDDS subunit. Functional studies using yeast complementation assay and in vitro activity measurements confirmed that these changes affected the catalytic activity of the cis-PTase and showed growth defect in yeast complementation system as compared with the wild-type enzyme and retinitis pigmentosa-associated protein. In conclusion, we characterized a distinctive neurodegenerative disorder due to de novo DHDDS variants, which clinically belongs to the spectrum of genetic progressive encephalopathies with myoclonus. Clinical and biochemical data from this cohort depicted a condition at the intersection of congenital disorders of glycosylation and inherited storage diseases with several features akin to of progressive myoclonus epilepsy such as neuronal ceroid lipofuscinosis and other lysosomal disorders.
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Affiliation(s)
- Serena Galosi
- Department of Human Neuroscience, Sapienza University, Rome 00185, Italy
| | - Ban H Edani
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520, USA.,Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Simone Martinelli
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Rome 00161, Italy
| | - Hana Hansikova
- Department of Pediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague 12808, Czech Republic
| | - Erik A Eklund
- Section for Pediatrics, Department of Clinical Sciences, Lund University, Lund 22184, Sweden
| | - Caterina Caputi
- Department of Human Neuroscience, Sapienza University, Rome 00185, Italy
| | - Laura Masuelli
- Department of Experimental Medicine, Sapienza University, Rome 00161, Italy
| | - Nicole Corsten-Janssen
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen 9700, The Netherlands
| | - Myriam Srour
- Department of Pediatrics, McGill University, Montreal, QC H4A 3J1, Canada.,Department of Neurology and Neurosurgery, McGill University, Montreal, QC H4A 3J1, Canada
| | - Renske Oegema
- Department of Genetics, University Medical Center Utrecht, Utrecht 3584 CX, The Netherlands
| | - Daniëlle G M Bosch
- Department of Genetics, University Medical Center Utrecht, Utrecht 3584 CX, The Netherlands
| | - Colin A Ellis
- Department of Neurology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Louise Amlie-Wolf
- Division of Medical Genetics, Nemours/A I duPont Hospital for Children, Wilmington, DE 19803, USA
| | - Andrea Accogli
- Department of Pediatrics, McGill University, Montreal, QC H4A 3J1, Canada.,Department of Neurology and Neurosurgery, McGill University, Montreal, QC H4A 3J1, Canada
| | - Isis Atallah
- Division of Genetic Medicine, Lausanne University Hospital and University of Lausanne, Lausanne 1011, Switzerland
| | - Luisa Averdunk
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf 40225, Germany
| | - Kristin W Barañano
- Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
| | - Roberto Bei
- Department of Clinical Sciences and Translational Medicine, University of Rome 'Tor Vergata', Rome 00133, Italy
| | - Irene Bagnasco
- Division of Neuropsychiatry, Epilepsy Center for Children, Martini Hospital, Turin 10128, Italy
| | - Alfredo Brusco
- Department of Medical Sciences, University of Torino & Medical Genetics Unit, Città della Salute e della Scienza University Hospital, Turin 10126, Italy
| | - Scott Demarest
- Children's Hospital Colorado, Aurora, CO 80045, USA.,Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Anne-Sophie Alaix
- Hopital Universitaire Necker Enfants Malades APHP, Paris 75015, France
| | | | - Felix Distelmaier
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf 40225, Germany
| | - Frances Elmslie
- South West Thames Regional Genetics Service, St. George's Healthcare NHS Trust, London SW17 0QT, UK
| | - Ziv Gan-Or
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC H4A 3J1, Canada.,Montréal Neurological Institute and Hospital, McGill University, Montreal, QC H3A 2B4, Canada.,Department of Human Genetics, McGill University, Montréal, QC H3A 0C7, Canada
| | - Jean-Marc Good
- Division of Genetic Medicine, Lausanne University Hospital and University of Lausanne, Lausanne 1011, Switzerland
| | - Karen Gripp
- Division of Medical Genetics, Nemours/A I duPont Hospital for Children, Wilmington, DE 19803, USA
| | - Erik-Jan Kamsteeg
- Department of Human Genetics, Radboud University Medical Centre, Nijmegen 6525, The Netherlands
| | - Ellen Macnamara
- Undiagnosed Diseases Program, National Institutes of Health, Bethesda, MD 20892-2152, USA
| | - Carlo Marcelis
- Department of Clinical Genetics, Radboud University Medical Centre, Nijmegen 6525, The Netherlands
| | - Noëlle Mercier
- Service d'Epileptologie et Médecine du handicap, Hôpital Neurologique, Institution de Lavigny, Lavigny 1175, Switzerland
| | - Joseph Peeden
- East Tennessee Children's Hospital, University of Tennessee Department of Medicine, Knoxville, TN 37916, USA
| | - Simone Pizzi
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome 00146, Italy
| | - Luca Pannone
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome 00146, Italy
| | - Marwan Shinawi
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Camilo Toro
- Undiagnosed Diseases Program, National Institutes of Health, Bethesda, MD 20892-2152, USA
| | - Nienke E Verbeek
- Department of Genetics, University Medical Center Utrecht, Utrecht 3584 CX, The Netherlands
| | - Sunita Venkateswaran
- Division of Neurology, Children's Hospital of Eastern Ontario, Ottawa ON K1H 8L1, Canada
| | | | - Lucie Zdrazilova
- Department of Pediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague 12808, Czech Republic
| | - Rong Zhang
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520, USA.,Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Giovanna Zorzi
- Department of Pediatric Neurology, IRCCS Foundation Carlo Besta Neurological Institute, Milan 20133, Italy
| | - Renzo Guerrini
- AOU Meyer, Pediatric Neurology, Neurogenetics and Neurobiology Unit and Laboratories, Meyer Children's Hospital, University of Florence, Florence 50139, Italy
| | - William C Sessa
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520, USA.,Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Dirk J Lefeber
- Department of Neurology, Translational Metabolic Laboratory, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Centre, Nijmegen 6525 AJ, The Netherlands
| | - Marco Tartaglia
- Genetics and Rare Diseases Research Division, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome 00146, Italy
| | - Fadi F Hamdan
- Division of Medical Genetics, Department of Pediatrics, CHU Sainte-Justine and University of Montreal, Montreal, QC H3T1C5, Canada
| | - Kariona A Grabińska
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520, USA.,Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Vincenzo Leuzzi
- Department of Human Neuroscience, Sapienza University, Rome 00185, Italy
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9
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Gawarecka K, Siwinska J, Poznanski J, Onysk A, Surowiecki P, Sztompka K, Surmacz L, Ahn JH, Korte A, Swiezewska E, Ihnatowicz A. cis-prenyltransferase 3 and α/β-hydrolase are new determinants of dolichol accumulation in Arabidopsis. PLANT, CELL & ENVIRONMENT 2022; 45:479-495. [PMID: 34778961 PMCID: PMC9300173 DOI: 10.1111/pce.14223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 11/06/2021] [Accepted: 11/07/2021] [Indexed: 06/13/2023]
Abstract
Dolichols (Dols), ubiquitous components of living organisms, are indispensable for cell survival. In plants, as well as other eukaryotes, Dols are crucial for post-translational protein glycosylation, aberration of which leads to fatal metabolic disorders in humans and male sterility in plants. Until now, the mechanisms underlying Dol accumulation remain elusive. In this study, we have analysed the natural variation of the accumulation of Dols and six other isoprenoids among more than 120 Arabidopsis thaliana accessions. Subsequently, by combining QTL and GWAS approaches, we have identified several candidate genes involved in the accumulation of Dols, polyprenols, plastoquinone and phytosterols. The role of two genes implicated in the accumulation of major Dols in Arabidopsis-the AT2G17570 gene encoding a long searched for cis-prenyltransferase (CPT3) and the AT1G52460 gene encoding an α/β-hydrolase-is experimentally confirmed. These data will help to generate Dol-enriched plants which might serve as a remedy for Dol-deficiency in humans.
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Affiliation(s)
- Katarzyna Gawarecka
- Institute of Biochemistry and BiophysicsPolish Academy of SciencesWarszawaPoland
- Department of Life SciencesKorea UniversitySeoulKorea
| | - Joanna Siwinska
- Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of GdanskUniversity of GdanskGdanskPoland
| | - Jaroslaw Poznanski
- Institute of Biochemistry and BiophysicsPolish Academy of SciencesWarszawaPoland
| | - Agnieszka Onysk
- Institute of Biochemistry and BiophysicsPolish Academy of SciencesWarszawaPoland
| | | | - Karolina Sztompka
- Institute of Biochemistry and BiophysicsPolish Academy of SciencesWarszawaPoland
| | - Liliana Surmacz
- Institute of Biochemistry and BiophysicsPolish Academy of SciencesWarszawaPoland
| | - Ji Hoon Ahn
- Department of Life SciencesKorea UniversitySeoulKorea
| | - Arthur Korte
- Center for Computational and Theoretical BiologyUniversity of WurzburgWurzburgGermany
| | - Ewa Swiezewska
- Institute of Biochemistry and BiophysicsPolish Academy of SciencesWarszawaPoland
| | - Anna Ihnatowicz
- Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of GdanskUniversity of GdanskGdanskPoland
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10
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Kamarus Jaman N, Rehsi P, Henderson RH, Löbel U, Mankad K, Grunewald S. SRD5A3-CDG: Emerging Phenotypic Features of an Ultrarare CDG Subtype. Front Genet 2021; 12:737094. [PMID: 34925443 PMCID: PMC8671882 DOI: 10.3389/fgene.2021.737094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 10/25/2021] [Indexed: 11/13/2022] Open
Abstract
Background: SRD5A3-CDG is a rare N-glycosylation defect caused by steroid 5 alpha reductase type 3 deficiency. Its key feature is an early severe visual impairment with variable ocular anomalies often leading to diagnosis. Additional symptoms are still poorly defined. In this case study, we discuss 11 genetically confirmed cases, and report on emerging features involving other systems in addition to the eye phenotype. Methods: In total, 11 SRD5A3-CDG patients in five sets of sibships were included in the study. Data on 9 of 11 patients are as of yet unpublished. Patients’ results on biochemical and genetic investigations and on in-depth phenotyping are presented. Results: Key diagnostic features of SRD5A3-CDG are ophthalmological abnormalities with early-onset retinal dystrophy and optic nerve hypoplasia. SRD5A3-CDG is also characterized by variable neurological symptoms including intellectual disability, ataxia, and hypotonia. Furthermore, ichthyosiform skin lesions, joint laxity, and scoliosis have been observed in our cohort. We also report additional findings including dystonia, anxiety disorder, gastrointestinal symptoms, and MRI findings of small basal ganglia and mal-rotated hippocampus, whereas previous publications described dysmorphic features as a common finding in SRD5A3, which could not be confirmed in our patient cohort. Conclusion: The detailed description of the phenotype of this large cohort of patients with SRD5A3-CDG highlights that the key clinical diagnostic features of SRD5A3-CDG are an early onset form of ophthalmological problems in patients with a multisystem disorder with variable symptoms evolving over time. This should aid earlier diagnosis and confirms the need for long-time follow-up of patients.
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Affiliation(s)
- Nazreen Kamarus Jaman
- Metabolic Department, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Preeya Rehsi
- Metabolic Department, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
| | - Robert H Henderson
- Ophthalmology Department, Great Ormond Street Hospital, London, United Kingdom.,Ophthalmology Department, Moorfields Eye Hospital, London, United Kingdom
| | - Ulrike Löbel
- Department of Radiology, Great Ormond Street Hospital for Children, London, United Kingdom
| | - Kshitij Mankad
- Department of Radiology, Great Ormond Street Hospital for Children, London, United Kingdom
| | - Stephanie Grunewald
- Metabolic Department, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom.,Institute for Child Health, NIHR Biomedical Research Center (BRC), University College London, London, United Kingdom
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11
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Komlosi K, Claris O, Collardeau-Frachon S, Kopp J, Hausser I, Mazereeuw-Hautier J, Jonca N, Zimmer AD, Sanlaville D, Fischer J. Fatal Neonatal DOLK-CDG as a Rare Form of Syndromic Ichthyosis. Front Genet 2021; 12:719624. [PMID: 34956305 PMCID: PMC8693085 DOI: 10.3389/fgene.2021.719624] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 11/02/2021] [Indexed: 11/13/2022] Open
Abstract
Neonatal collodion baby or ichthyosis can pose a diagnostic challenge, and in many cases, only additional organ involvement or the course of the disease will help differentiate between non-syndromic and syndromic forms. Skin abnormalities are described in about 20% of the congenital disorders of glycosylation (CDG). Among those, some rare CDG forms constitute a special group among the syndromic ichthyoses and can initially misdirect the diagnosis towards non-syndromic genodermatosis. DOLK-CDG is such a rare subtype, resulting from a defect in dolichol kinase, in which the congenital skin phenotype (often ichthyosis) is later associated with variable extracutaneous features such as dilatative cardiomyopathy, epilepsy, microcephaly, visual impairment, and hypoglycemia and may lead to a fatal course. We report two neonatal cases of lethal ichthyosis from the same family, with distal digital constrictions and a progressive course leading to multi-organ failure and death. Postmortem trio whole-exome sequencing revealed the compound heterozygous variants NM_014908.3: c.1342G>A, p.(Gly448Arg) and NM_014908.3: c.1558A>G, p.(Thr520Ala) in the DOLK gene in the first affected child, which were confirmed in the affected sibling. Reduced staining with anti-α-Dystroglycan antibody was observed in frozen heart tissue of the second child as an expression of reduced O-mannosylation due to the dolichol kinase deficiency. In addition to the detailed dermatopathological changes, both cases presented hepatic and extrahepatic hemosiderosis on histological examination. Our patients represent an early and fatal form of DOLK-CDG with a striking presentation at birth resembling severe collodion baby. Both cases emphasize the phenotypic variability of glycosylation disorders and the importance to broaden the differential diagnosis of ichthyosis and to actively search for organ involvement in neonates with ichthyosis.
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Affiliation(s)
- Katalin Komlosi
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- *Correspondence: Katalin Komlosi,
| | - Olivier Claris
- Department of Neonatology, Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Bron, France
- Claude Bernard University, Lyon, France
| | - Sophie Collardeau-Frachon
- Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Institut de Pathologie, Bron, France
- Faculté de médecine Lyon Est, Claude Bernard University, Lyon, France
| | - Julia Kopp
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Ingrid Hausser
- Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany
| | - Juliette Mazereeuw-Hautier
- Dermatology Department, Reference Center for Rare Skin Diseases, CHU Larrey, Université Paul Sabatier, Toulouse, France
| | - Nathalie Jonca
- Infinity, CNRS, Inserm, UPS, Université Toulouse, Toulouse, France
- CHU Toulouse, Hôpital Purpan, Laboratoire de Biologie Cellulaire et Cytologie, Institut Fédératif de Biologie, Toulouse, France
| | - Andreas D. Zimmer
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Damien Sanlaville
- Hospices Civils de Lyon, Hôpital Femme Mère Enfant, Service de Génétique, Bron, France
- Institut Neuromyogène, Université de Lyon, Lyon, France
| | - Judith Fischer
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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12
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Glycoconjugate journal special issue on: the glycobiology of Parkinson's disease. Glycoconj J 2021; 39:55-74. [PMID: 34757539 DOI: 10.1007/s10719-021-10024-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 09/14/2021] [Accepted: 09/24/2021] [Indexed: 10/19/2022]
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder that affects over 10 million aging people worldwide. This condition is characterized by the degeneration of dopaminergic neurons in the pars compacta region of the substantia nigra (SNpc) and by aggregation of proteins, commonly α-synuclein (SNCA). The formation of Lewy bodies that encapsulate aggregated proteins in lipid vesicles is a hallmark of PD. Glycosylation of proteins and neuroinflammation are involved in the pathogenesis. SNCA has many posttranslational modifications and interacts with components of membranes that affect aggregation. The large membrane lipid dolichol accumulates in the brain upon age and has a significant effect on membrane structure. The replacement of dopamine and dopaminergic neurons are at the forefront of therapeutic development. This review examines the role of membrane lipids, glycolipids, glycoproteins and dopamine in the aggregation of SNCA and development of PD. We discuss the SNCA-dopamine-neuromelanin-dolichol axis and the role of membranes in neuronal stem cells that could be a regenerative therapy for PD patients.
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13
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Minakata S, Manabe S, Inai Y, Ikezaki M, Nishitsuji K, Ito Y, Ihara Y. Protein C-Mannosylation and C-Mannosyl Tryptophan in Chemical Biology and Medicine. Molecules 2021; 26:molecules26175258. [PMID: 34500691 PMCID: PMC8433626 DOI: 10.3390/molecules26175258] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 12/25/2022] Open
Abstract
C-Mannosylation is a post-translational modification of proteins in the endoplasmic reticulum. Monomeric α-mannose is attached to specific Trp residues at the first Trp in the Trp-x-x-Trp/Cys (W-x-x-W/C) motif of substrate proteins, by the action of C-mannosyltransferases, DPY19-related gene products. The acceptor substrate proteins are included in the thrombospondin type I repeat (TSR) superfamily, cytokine receptor type I family, and others. Previous studies demonstrated that C-mannosylation plays critical roles in the folding, sorting, and/or secretion of substrate proteins. A C-mannosylation-defective gene mutation was identified in humans as the disease-associated variant affecting a C-mannosylation motif of W-x-x-W of ADAMTSL1, which suggests the involvement of defects in protein C-mannosylation in human diseases such as developmental glaucoma, myopia, and/or retinal defects. On the other hand, monomeric C-mannosyl Trp (C-Man-Trp), a deduced degradation product of C-mannosylated proteins, occurs in cells and extracellular fluids. Several studies showed that the level of C-Man-Trp is upregulated in blood of patients with renal dysfunction, suggesting that the metabolism of C-Man-Trp may be involved in human kidney diseases. Together, protein C-mannosylation is considered to play important roles in the biosynthesis and functions of substrate proteins, and the altered regulation of protein C-manosylation may be involved in the pathophysiology of human diseases. In this review, we consider the biochemical and biomedical knowledge of protein C-mannosylation and C-Man-Trp, and introduce recent studies concerning their significance in biology and medicine.
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Affiliation(s)
- Shiho Minakata
- Department of Biochemistry, Wakayama Medical University, 811-1 Kimiidera, Wakayama, Wakayama 641-0012, Japan; (S.M.); (Y.I.); (M.I.); (K.N.)
| | - Shino Manabe
- Pharmaceutical Department, The Institute of Medicinal Chemistry, Hoshi University, 2-4-41 Ebara, Shinagawa, Tokyo 142-8501, Japan;
- Research Center for Pharmaceutical Development, Graduate School of Pharmaceutical Science & Faculty of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Sendai, Miyagi 980-8578, Japan
| | - Yoko Inai
- Department of Biochemistry, Wakayama Medical University, 811-1 Kimiidera, Wakayama, Wakayama 641-0012, Japan; (S.M.); (Y.I.); (M.I.); (K.N.)
| | - Midori Ikezaki
- Department of Biochemistry, Wakayama Medical University, 811-1 Kimiidera, Wakayama, Wakayama 641-0012, Japan; (S.M.); (Y.I.); (M.I.); (K.N.)
| | - Kazuchika Nishitsuji
- Department of Biochemistry, Wakayama Medical University, 811-1 Kimiidera, Wakayama, Wakayama 641-0012, Japan; (S.M.); (Y.I.); (M.I.); (K.N.)
| | - Yukishige Ito
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan;
- RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yoshito Ihara
- Department of Biochemistry, Wakayama Medical University, 811-1 Kimiidera, Wakayama, Wakayama 641-0012, Japan; (S.M.); (Y.I.); (M.I.); (K.N.)
- Correspondence: ; Tel.: +81-73-441-0628
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14
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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. Proc Natl Acad Sci U S A 2020; 117:20794-20802. [PMID: 32817466 PMCID: PMC7456142 DOI: 10.1073/pnas.2008381117] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Cis-prenyltransferase (cis-PTase) catalyzes the rate-limiting step in the synthesis of glycosyl carrier lipids required for protein glycosylation in the lumen of endoplasmic reticulum. Here, we report the crystal structure of the human NgBR/DHDDS complex, which represents an atomic resolution structure for any heterodimeric cis-PTase. The crystal structure sheds light on how NgBR stabilizes DHDDS through dimerization, participates in the enzyme's active site through its C-terminal -RXG- motif, and how phospholipids markedly stimulate cis-PTase activity. Comparison of NgBR/DHDDS with homodimeric cis-PTase structures leads to a model where the elongating isoprene chain extends beyond the enzyme's active site tunnel, and an insert within the α3 helix helps to stabilize this energetically unfavorable state to enable long-chain synthesis to occur. These data provide unique insights into how heterodimeric cis-PTases have evolved from their ancestral, homodimeric forms to fulfill their function in long-chain polyprenol synthesis.
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Affiliation(s)
- Ban H Edani
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520
| | - Kariona A Grabińska
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520
| | - Rong Zhang
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520
| | - Eon Joo Park
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520
| | - Benjamin Siciliano
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520
| | - Liliana Surmacz
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106, Warsaw, Poland
| | - Ya Ha
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520;
| | - William C Sessa
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT 06520;
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520
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15
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Metabolomics profiling reveals new aspects of dolichol biosynthesis in Plasmodium falciparum. Sci Rep 2020; 10:13264. [PMID: 32764679 PMCID: PMC7414040 DOI: 10.1038/s41598-020-70246-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 07/24/2020] [Indexed: 01/27/2023] Open
Abstract
The cis-polyisoprenoid lipids namely polyprenols, dolichols and their derivatives are linear polymers of several isoprene units. In eukaryotes, polyprenols and dolichols are synthesized as a mixture of four or more homologues of different length with one or two predominant species with sizes varying among organisms. Interestingly, co-occurrence of polyprenols and dolichols, i.e. detection of a dolichol along with significant levels of its precursor polyprenol, are unusual in eukaryotic cells. Our metabolomics studies revealed that cis-polyisoprenoids are more diverse in the malaria parasite Plasmodium falciparum than previously postulated as we uncovered active de novo biosynthesis and substantial levels of accumulation of polyprenols and dolichols of 15 to 19 isoprene units. A distinctive polyprenol and dolichol profile both within the intraerythrocytic asexual cycle and between asexual and gametocyte stages was observed suggesting that cis-polyisoprenoid biosynthesis changes throughout parasite’s development. Moreover, we confirmed the presence of an active cis-prenyltransferase (PfCPT) and that dolichol biosynthesis occurs via reduction of the polyprenol to dolichol by an active polyprenol reductase (PfPPRD) in the malaria parasite.
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16
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A new role for dolichol isoform profile in the diagnostics of CDG disorders. Clin Chim Acta 2020; 507:88-93. [DOI: 10.1016/j.cca.2020.04.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 03/23/2020] [Accepted: 04/10/2020] [Indexed: 11/22/2022]
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17
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Ramachandra Rao S, Skelton LA, Wu F, Onysk A, Spolnik G, Danikiewicz W, Butler MC, Stacks DA, Surmacz L, Mu X, Swiezewska E, Pittler SJ, Fliesler SJ. Retinal Degeneration Caused by Rod-Specific Dhdds Ablation Occurs without Concomitant Inhibition of Protein N-Glycosylation. iScience 2020; 23:101198. [PMID: 32526701 PMCID: PMC7287266 DOI: 10.1016/j.isci.2020.101198] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 04/10/2020] [Accepted: 05/20/2020] [Indexed: 12/16/2022] Open
Abstract
Dehydrodolichyl diphosphate synthase (DHDDS) catalyzes the committed step in dolichol synthesis. Recessive mutations in DHDDS cause retinitis pigmentosa (RP59), resulting in blindness. We hypothesized that rod photoreceptor-specific ablation of Dhdds would cause retinal degeneration due to diminished dolichol-dependent protein N-glycosylation. Dhddsflx/flx mice were crossed with rod-specific Cre recombinase-expressing (Rho-iCre75) mice to generate rod-specific Dhdds knockout mice (Dhddsflx/flx iCre+). In vivo morphological and electrophysiological evaluation of Dhddsflx/flx iCre+ retinas revealed mild retinal dysfunction at postnatal (PN) 4 weeks, compared with age-matched controls; however, rapid photoreceptor degeneration ensued, resulting in almost complete loss of rods and cones by PN 6 weeks. Retina dolichol levels were markedly decreased by PN 4 weeks in Dhddsflx/flx iCre+ mice, relative to controls; despite this, N-glycosylation of retinal proteins, including opsin (the dominant rod-specific glycoprotein), persisted in Dhddsflx/flx iCre+ mice. These findings challenge the conventional mechanistic view of RP59 as a congenital disorder of glycosylation. Deletion of Dhdds in rod cells caused rapid retinal degeneration in mice Retinal dolichol levels markedly decreased before onset of degeneration Protein N-glycosylation was uncompromised despite Dhdds deletion Degeneration also involved gliosis, microglial activation, and phagoptosis
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Affiliation(s)
- Sriganesh Ramachandra Rao
- Department of Ophthalmology/Ross Eye Institute, Jacobs School of Medicine and Biomedical Sciences, State University of New York- University at Buffalo, Buffalo, NY 14209, USA; Research Service, VA Western NY Healthcare System, Buffalo, NY 142015, USA; Department of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, State University of New York- University at Buffalo, Buffalo, NY 14203, USA
| | - Lara A Skelton
- Department of Ophthalmology/Ross Eye Institute, Jacobs School of Medicine and Biomedical Sciences, State University of New York- University at Buffalo, Buffalo, NY 14209, USA; Research Service, VA Western NY Healthcare System, Buffalo, NY 142015, USA; Department of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, State University of New York- University at Buffalo, Buffalo, NY 14203, USA
| | - Fuguo Wu
- Department of Ophthalmology/Ross Eye Institute, Jacobs School of Medicine and Biomedical Sciences, State University of New York- University at Buffalo, Buffalo, NY 14209, USA; Department of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, State University of New York- University at Buffalo, Buffalo, NY 14203, USA; New York State Center of Excellence in Bioinformatics and Life Sciences, State University of New York- University at Buffalo, Buffalo, NY 14203, USA
| | - Agnieszka Onysk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Grzegorz Spolnik
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw 02106, Poland
| | - Witold Danikiewicz
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw 02106, Poland
| | - Mark C Butler
- Department of Ophthalmology/Ross Eye Institute, Jacobs School of Medicine and Biomedical Sciences, State University of New York- University at Buffalo, Buffalo, NY 14209, USA; Research Service, VA Western NY Healthcare System, Buffalo, NY 142015, USA
| | - Delores A Stacks
- Department of Optometry and Vision Science, Vision Science Research Center, School of Optometry, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Liliana Surmacz
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Xiuqian Mu
- Department of Ophthalmology/Ross Eye Institute, Jacobs School of Medicine and Biomedical Sciences, State University of New York- University at Buffalo, Buffalo, NY 14209, USA; Department of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, State University of New York- University at Buffalo, Buffalo, NY 14203, USA; New York State Center of Excellence in Bioinformatics and Life Sciences, State University of New York- University at Buffalo, Buffalo, NY 14203, USA
| | - Ewa Swiezewska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Steven J Pittler
- Department of Optometry and Vision Science, Vision Science Research Center, School of Optometry, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Steven J Fliesler
- Department of Ophthalmology/Ross Eye Institute, Jacobs School of Medicine and Biomedical Sciences, State University of New York- University at Buffalo, Buffalo, NY 14209, USA; Research Service, VA Western NY Healthcare System, Buffalo, NY 142015, USA; Department of Biochemistry, Jacobs School of Medicine and Biomedical Sciences, State University of New York- University at Buffalo, Buffalo, NY 14203, USA.
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18
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DeRamus ML, Davis SJ, Rao SR, Nyankerh C, Stacks D, Kraft TW, Fliesler SJ, Pittler SJ. Selective Ablation of Dehydrodolichyl Diphosphate Synthase in Murine Retinal Pigment Epithelium (RPE) Causes RPE Atrophy and Retinal Degeneration. Cells 2020; 9:E771. [PMID: 32245241 PMCID: PMC7140717 DOI: 10.3390/cells9030771] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/06/2020] [Accepted: 03/17/2020] [Indexed: 02/07/2023] Open
Abstract
Patients with certain defects in the dehydrodolichyl diphosphate synthase (DHDDS) gene (RP59; OMIM #613861) exhibit classic symptoms of retinitis pigmentosa, as well as macular changes, suggestive of retinal pigment epithelium (RPE) involvement. The DHDDS enzyme is ubiquitously required for several pathways of protein glycosylation. We wish to understand the basis for selective ocular pathology associated with certain DHDDS mutations and the contribution of specific ocular cell types to the pathology of mutant Dhdds-mediated retinal degeneration. To circumvent embryonic lethality associated with Dhdds knockout, we generated a Cre-dependent knockout allele of murine Dhdds (Dhddsflx/flx). We used targeted Cre expression to study the importance of the enzyme in the RPE. Structural alterations of the RPE and retina including reduction in outer retinal thickness, cell layer disruption, and increased RPE hyper-reflectivity were apparent at one postnatal month. At three months, RPE and photoreceptor disruption was observed non-uniformly across the retina as well as RPE transmigration into the photoreceptor layer, external limiting membrane descent towards the RPE, and patchy loss of photoreceptors. Functional loss measured by electroretinography was consistent with structural loss showing scotopic a- and b-wave reductions of 83% and 77%, respectively, at three months. These results indicate that RPE dysfunction contributes to DHDDS mutation-mediated pathology and suggests a more complicated disease mechanism than simply disruption of glycosylation.
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Affiliation(s)
- Marci L. DeRamus
- Department of Optometry and Vision Science, Vision Science Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (M.L.D.); (S.J.D.); (C.N.); (D.S.); (T.W.K.)
| | - Stephanie J. Davis
- Department of Optometry and Vision Science, Vision Science Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (M.L.D.); (S.J.D.); (C.N.); (D.S.); (T.W.K.)
| | - Sriganesh Ramachandra Rao
- Departments of Ophthalmology and Biochemistry, State University of New York-University at Buffalo, Buffalo, NY 14209, USA; and Research Service, VA Western NY Healthcare System, Buffalo, NY 14215, USA; (S.R.R.); (S.J.F.)
| | - Cyril Nyankerh
- Department of Optometry and Vision Science, Vision Science Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (M.L.D.); (S.J.D.); (C.N.); (D.S.); (T.W.K.)
| | - Delores Stacks
- Department of Optometry and Vision Science, Vision Science Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (M.L.D.); (S.J.D.); (C.N.); (D.S.); (T.W.K.)
| | - Timothy W. Kraft
- Department of Optometry and Vision Science, Vision Science Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (M.L.D.); (S.J.D.); (C.N.); (D.S.); (T.W.K.)
| | - Steven J. Fliesler
- Departments of Ophthalmology and Biochemistry, State University of New York-University at Buffalo, Buffalo, NY 14209, USA; and Research Service, VA Western NY Healthcare System, Buffalo, NY 14215, USA; (S.R.R.); (S.J.F.)
| | - Steven J. Pittler
- Department of Optometry and Vision Science, Vision Science Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (M.L.D.); (S.J.D.); (C.N.); (D.S.); (T.W.K.)
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19
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Ferreira CR, Altassan R, Marques-Da-Silva D, Francisco R, Jaeken J, Morava E. Recognizable phenotypes in CDG. J Inherit Metab Dis 2018; 41:541-553. [PMID: 29654385 PMCID: PMC5960425 DOI: 10.1007/s10545-018-0156-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 12/23/2017] [Accepted: 02/06/2018] [Indexed: 01/06/2023]
Abstract
Pattern recognition, using a group of characteristic, or discriminating features, is a powerful tool in metabolic diagnostic. A classic example of this approach is used in biochemical analysis of urine organic acid analysis, where the reporting depends more on the correlation of pertinent positive and negative findings, rather than on the absolute values of specific markers. Similar uses of pattern recognition in the field of biochemical genetics include the interpretation of data obtained by metabolomics, like glycomics, where a recognizable pattern or the presence of a specific glycan sub-fraction can lead to the direct diagnosis of certain types of congenital disorders of glycosylation. Another indispensable tool is the use of clinical pattern recognition-or syndromology-relying on careful phenotyping. While genomics might uncover variants not essential in the final clinical expression of disease, and metabolomics could point to a mixture of primary but also secondary changes in biochemical pathways, phenomics describes the clinically relevant manifestations and the full expression of the disease. In the current review we apply phenomics to the field of congenital disorders of glycosylation, focusing on recognizable differentiating findings in glycosylation disorders, characteristic dysmorphic features and malformations in PMM2-CDG, and overlapping patterns among the currently known glycosylation disorders based on their pathophysiological basis.
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Affiliation(s)
- Carlos R Ferreira
- Medical Genetics Branch National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
- Division of Genetics and Metabolism, Children's National Medical Center, Washington, DC, USA
| | - Ruqaia Altassan
- Metabolic Center, Department of Pediatrics, University Hospitals Leuven, Herestraat 49, B-3000, Leuven, Belgium
- Department of Development and Regeneration, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Dorinda Marques-Da-Silva
- UCIBIO, Departamento Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Lisboa, Portugal
- Portuguese Association for CDG, Lisboa, Portugal
| | - Rita Francisco
- UCIBIO, Departamento Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Lisboa, Portugal
- Portuguese Association for CDG, Lisboa, Portugal
| | - Jaak Jaeken
- Metabolic Center, Department of Pediatrics, University Hospitals Leuven, Herestraat 49, B-3000, Leuven, Belgium
- Department of Development and Regeneration, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Eva Morava
- Metabolic Center, Department of Pediatrics, University Hospitals Leuven, Herestraat 49, B-3000, Leuven, Belgium.
- Department of Development and Regeneration, Faculty of Medicine, KU Leuven, Leuven, Belgium.
- Department of Clinical Genomics, Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA.
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20
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Molecular hypotheses to explain the shared pathways and underlying pathobiological causes in catatonia and in catatonic presentations in neuropsychiatric disorders. Med Hypotheses 2018. [DOI: 10.1016/j.mehy.2018.02.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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21
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Ng BG, Asteggiano CG, Kircher M, Buckingham KJ, Raymond K, Nickerson DA, Shendure J, Bamshad MJ, Ensslen M, Freeze HH. Encephalopathy caused by novel mutations in the CMP-sialic acid transporter, SLC35A1. Am J Med Genet A 2017; 173:2906-2911. [PMID: 28856833 DOI: 10.1002/ajmg.a.38412] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/21/2017] [Accepted: 07/31/2017] [Indexed: 12/16/2022]
Abstract
Transport of activated nucleotide-sugars into the Golgi is critical for proper glycosylation and mutations in these transporters cause a group of rare genetic disorders termed congenital disorders of glycosylation. We performed exome sequencing on an individual with a profound neurological presentation and identified rare compound heterozygous mutations, p.Thr156Arg and p.Glu196Lys, in the CMP-sialic acid transporter, SLC35A1. Patient primary fibroblasts and serum showed a considerable decrease in the amount of N- and O-glycans terminating in sialic acid. Direct measurement of CMP-sialic acid transport into the Golgi showed a substantial decrease in overall rate of transport. Here we report the identification of the third patient with CMP-sialic acid transporter deficiency, who presented with severe neurological phenotype, but without hematological abnormalities.
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Affiliation(s)
- Bobby G Ng
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California
| | - Carla G Asteggiano
- CONICET - Centro de Estudio de las Metabolopatías Congénitas, Universidad Nacional de Córdoba, Facultad de Medicina, Universidad Católica de Córdoba, Córdoba, Argentina
| | - Martin Kircher
- Department of Genome Sciences, University of Washington, Seattle, Washington
| | - Kati J Buckingham
- Department of Pediatrics, University of Washington, Seattle, Washington
| | - Kimiyo Raymond
- Biochemical Genetics Laboratory, Mayo Clinic College of Medicine, Rochester, Minnesota
| | - Deborah A Nickerson
- Department of Genome Sciences, University of Washington, Seattle, Washington
| | - Jay Shendure
- Department of Genome Sciences, University of Washington, Seattle, Washington.,Howard Hughes Medical Institute, University of Washington, Seattle, Washington
| | - Michael J Bamshad
- Department of Genome Sciences, University of Washington, Seattle, Washington.,Department of Pediatrics, University of Washington, Seattle, Washington
| | | | - Matthias Ensslen
- Department of Paediatric Neurology and Developmental Medicine, Hauner Children's Hospital, University of Munich Lindwurmstrasse 4, Munich, Germany
| | - Hudson H Freeze
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California
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22
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Rush ET, Baker CV, Rizzo WB. Dolichol kinase deficiency (DOLK-CDG): Two new cases and expansion of phenotype. Am J Med Genet A 2017; 173:2428-2434. [DOI: 10.1002/ajmg.a.38287] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 04/04/2017] [Accepted: 04/18/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Eric T. Rush
- Department of Pediatrics; University of Nebraska Medical Center; Omaha Nebraska
- Munroe-Meyer Institute for Genetics and Rehabilitation; University of Nebraska Medical Center; Omaha Nebraska
- Children's Hospital & Medical Center; Omaha Nebraska
| | - Craig V. Baker
- Department of Pediatrics-Division of Medical Genetics; UTHealth McGovern Medical School; Houston Texas
| | - William B. Rizzo
- Department of Pediatrics; University of Nebraska Medical Center; Omaha Nebraska
- Children's Hospital & Medical Center; Omaha Nebraska
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23
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Abstract
Congenital disorders of glycosylation (CDG) are one group among the disorders of glycosylation. The latter comprise defects associated with hypoglycosylation but also defects with hyperglycosylation. Genetic diseases with hypoglycosylation can be divided in primary congenital disorders of glycosylation (CDG) and in genetic diseases causing secondary hypoglycosylation. This review covers the human CDG highlights from the last 3 years (2014-2016) following a summary of the actual status of CDG. It expands on 23 novel CDG namely defects in SLC39A8, CAD, NANS, PGM3, SSR4, POGLUT1, NUS1, GANAB, PIGY, PIGW, PIGC, PIGG, PGAP1, PGAP3, VPS13B, CCDC115, TMEM199, ATP6AP1, ATP6V1A, ATP6V1E1, TRAPPC11, XYLT1 and XYLT2. Besides, it discusses novel phenotypes of known CDG (DHDDS-CDG, ALG9-CDG, EXT2-CDG, PIGA-CDG, PIGN-CDG), the elucidation of putative glycosyltransferase disorders as O-mannosylglycan synthesis disorders (TMEM5-CDG, ISPD-CDG, FKTN-CDG, FKRP-CDG), a novel CDG mechanism, advances in diagnosis, pathogenesis, treatment and finally an updated list of the 104 known CDG.
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Affiliation(s)
- Jaak Jaeken
- Center for Metabolic Diseases, University Hospital Gasthuisberg, KU Leuven, Herestraat 49, BE 3000, Leuven, Belgium.
| | - Romain Péanne
- Department of Human Genetics, University Hospital Gasthuisberg, KU Leuven, Leuven, Belgium
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24
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Wheeler PG, Ng BG, Sanford L, Sutton VR, Bartholomew DW, Pastore MT, Bamshad MJ, Kircher M, Buckingham KJ, Nickerson DA, Shendure J, Freeze HH. SRD5A3-CDG: Expanding the phenotype of a congenital disorder of glycosylation with emphasis on adult onset features. Am J Med Genet A 2016; 170:3165-3171. [PMID: 27480077 DOI: 10.1002/ajmg.a.37875] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 07/08/2016] [Indexed: 12/15/2022]
Abstract
Increasing numbers of congenital disorders of glycosylation (CDG) have been reported recently resulting in an expansion of the phenotypes associated with this group of disorders. SRD5A3 codes for polyprenol reductase which converts polyprenol to dolichol. This is a major pathway for dolichol biosynthesis for N-glycosylation, O-mannosylation, C-mannosylation, and GPI anchor synthesis. We present the features of five individuals (three children and two adults) with mutations in SRD5A3 focusing on the variable eye and skin involvement. We compare that to 13 affected individuals from the literature including five adults allowing us to delineate the features that may develop over time with this disorder including kyphosis, retinitis pigmentosa, and cataracts. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
| | - Bobby G Ng
- Human Genetics Program, Sanford-Burnham Prebys Medical Discovery Institute, La Jolla, California
| | | | - V Reid Sutton
- Department of Molecular and Human Genetics, Baylor College of Medicine and Texas Children's Hospital, Houston, Texas
| | - Dennis W Bartholomew
- Section of Molecular and Human Genetics, Nationwide Children's Hospital, Department of Pediatrics, Ohio State University, Columbus, Ohio
| | - Matthew T Pastore
- Section of Molecular and Human Genetics, Nationwide Children's Hospital, Department of Pediatrics, Ohio State University, Columbus, Ohio
| | - Michael J Bamshad
- Department of Genome Sciences, University of Washington Center for Mendelian Genomics, University of Washington, Seattle, Washington.,Department of Pediatrics, University of Washington, Seattle, Washington
| | - Martin Kircher
- Department of Pediatrics, University of Washington, Seattle, Washington
| | - Kati J Buckingham
- Department of Pediatrics, University of Washington, Seattle, Washington
| | - Deborah A Nickerson
- Department of Genome Sciences, University of Washington Center for Mendelian Genomics, University of Washington, Seattle, Washington
| | - Jay Shendure
- Department of Genome Sciences, University of Washington Center for Mendelian Genomics, University of Washington, Seattle, Washington.,Howard Hughes Medical Institute, University of Washington, Seattle, Washington
| | - Hudson H Freeze
- Human Genetics Program, Sanford-Burnham Prebys Medical Discovery Institute, La Jolla, California
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25
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Cavallini G, Sgarbossa A, Parentini I, Bizzarri R, Donati A, Lenci F, Bergamini E. Dolichol: A Component of the Cellular Antioxidant Machinery. Lipids 2016; 51:477-86. [PMID: 26968401 DOI: 10.1007/s11745-016-4137-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 02/25/2016] [Indexed: 10/22/2022]
Abstract
Dolichol, an end product of the mevalonate pathway, has been proposed as a biomarker of aging, but its biological role, not to mention its catabolism, has not been fully understood. UV-B radiation was used to induce oxidative stress in isolated rat hepatocytes by the collagenase method. Effects on dolichol, phospholipid-bound polyunsaturated fatty acids (PL-PUFA) and known lipid soluble antioxidants [coenzyme Q (CoQ) and α-tocopherol] were studied. The increase in oxidative stress was detected by a probe sensitive to reactive oxygen species (ROS). Peroxidation of lipids was assessed by measuring the release of thiobarbituric acid reactive substances (TBARS). Dolichol, CoQ, and α-tocopherol were assessed by high-pressure liquid chromatography (HPLC), PL-PUFA by gas-liquid chromatography (GC). UV-B radiation caused an immediate increase in ROS as well as lipid peroxidation and a simultaneous decrease in the levels of dolichol and lipid soluble antioxidants. Decrease in dolichol paralleled changes in CoQ levels and was smaller to that in α-tocopherol. The addition of mevinolin, a competitive inhibitor of the enzyme 3-hydroxy-3-methylglutaryl CoA reductase (HMG-CoAR), magnified the loss of dolichol and was associated with an increase in TBARS production. Changes in PL-PUFA were minor. These findings highlight that oxidative stress has very early and similar effects on dolichol and lipid soluble antioxidants. Lower levels of dolichol are associated with enhanced peroxidation of lipids, which suggest that dolichol may have a protective role in the antioxidant machinery of cell membranes and perhaps be a key to understanding some adverse effects of statin therapy.
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Affiliation(s)
- Gabriella Cavallini
- Interdepartmental Research Centre on Biology and Pathology of Aging, University of Pisa, Via Roma 55, 56126, Pisa, Italy.
| | - Antonella Sgarbossa
- Biophysics Institute of the National Research Council (IBF-CNR), Pisa, Italy.,NEST, Nanoscience Institute of the National Research Council (NANO-CNR) and Scuola Normale Superiore, Pisa, Italy
| | - Ilaria Parentini
- Interdepartmental Research Centre on Biology and Pathology of Aging, University of Pisa, Via Roma 55, 56126, Pisa, Italy
| | - Ranieri Bizzarri
- Biophysics Institute of the National Research Council (IBF-CNR), Pisa, Italy.,NEST, Nanoscience Institute of the National Research Council (NANO-CNR) and Scuola Normale Superiore, Pisa, Italy
| | - Alessio Donati
- Interdepartmental Research Centre on Biology and Pathology of Aging, University of Pisa, Via Roma 55, 56126, Pisa, Italy
| | - Francesco Lenci
- Biophysics Institute of the National Research Council (IBF-CNR), Pisa, Italy
| | - Ettore Bergamini
- Interdepartmental Research Centre on Biology and Pathology of Aging, University of Pisa, Via Roma 55, 56126, Pisa, Italy
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26
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Rush JS. Role of Flippases in Protein Glycosylation in the Endoplasmic Reticulum. Lipid Insights 2016; 8:45-53. [PMID: 26917968 PMCID: PMC4762491 DOI: 10.4137/lpi.s31784] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 01/12/2016] [Accepted: 01/15/2016] [Indexed: 12/21/2022] Open
Abstract
Glycosylation is essential to the synthesis, folding, and function of glycoproteins in eukaryotes. Proteins are co- and posttranslationally modified by a variety of glycans in the endoplasmic reticulum (ER); modifications include C- and O-mannosylation, N-glycosylation, and the addition of glycosylphosphatidylinositol membrane anchors. Protein glycosylation in the ER of eukaryotes involves enzymatic steps on both the cytosolic and lumenal surfaces of the ER membrane. The glycans are first assembled as precursor glycolipids, on the cytosolic surface of the ER, which are tethered to the membrane by attachment to a long-chain polyisoprenyl phosphate (dolichol) containing a reduced α-isoprene. The lipid-anchored building blocks then migrate transversely (flip) across the ER membrane to the lumenal surface, where final assembly of the glycan is completed. This strategy allows the cell to export high-energy biosynthetic intermediates as lipid-bound glycans, while constraining the glycosyl donors to the site of assembly on the membrane surface. This review focuses on the flippases that participate in protein glycosylation in the ER.
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Affiliation(s)
- Jeffrey S Rush
- Department of Molecular and Cellular Biochemistry, University of Kentucky College of Medicine, Lexington, KY, USA
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Jozwiak A, Gutkowska M, Gawarecka K, Surmacz L, Buczkowska A, Lichocka M, Nowakowska J, Swiezewska E. POLYPRENOL REDUCTASE2 Deficiency Is Lethal in Arabidopsis Due to Male Sterility. THE PLANT CELL 2015; 27:3336-3353. [PMID: 26628744 PMCID: PMC4707453 DOI: 10.1105/tpc.15.00463] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 10/20/2015] [Accepted: 11/17/2015] [Indexed: 05/30/2023]
Abstract
Dolichol is a required cofactor for protein glycosylation, the most common posttranslational modification modulating the stability and biological activity of proteins in all eukaryotic cells. We have identified and characterized two genes, PPRD1 and -2, which are orthologous to human SRD5A3 (steroid 5α reductase type 3) and encode polyprenol reductases responsible for conversion of polyprenol to dolichol in Arabidopsis thaliana. PPRD1 and -2 play dedicated roles in plant metabolism. PPRD2 is essential for plant viability; its deficiency results in aberrant development of the male gametophyte and sporophyte. Impaired protein glycosylation seems to be the major factor underlying these defects although disturbances in other cellular dolichol-dependent processes could also contribute. Shortage of dolichol in PPRD2-deficient cells is partially rescued by PPRD1 overexpression or by supplementation with dolichol. The latter has been discussed as a method to compensate for deficiency in protein glycosylation. Supplementation of the human diet with dolichol-enriched plant tissues could allow new therapeutic interventions in glycosylation disorders. This identification of PPRD1 and -2 elucidates the factors mediating the key step of the dolichol cycle in plant cells which makes manipulation of dolichol content in plant tissues feasible.
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Affiliation(s)
- Adam Jozwiak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Malgorzata Gutkowska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Katarzyna Gawarecka
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Liliana Surmacz
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Anna Buczkowska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Malgorzata Lichocka
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | | | - Ewa Swiezewska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
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Identification and characterization of transcriptional control region of the human beta 1,4-mannosyltransferase gene. Cytotechnology 2015; 69:417-434. [PMID: 26608959 DOI: 10.1007/s10616-015-9929-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 11/02/2015] [Indexed: 10/22/2022] Open
Abstract
All asparagine-linked glycans (N-glycans) on the eukaryotic glycoproteins are primarily derived from dolichol-linked oligosaccharides (DLO), synthesized on the rough endoplasmic reticulum membrane. We have previously reported cloning and identification of the human gene, HMT-1, which encodes chitobiosyldiphosphodolichol beta-mannosyltransferase (β1,4-MT) involved in the early assembly of DLO. Considering that N-glycosylation is one of the most ubiquitous post-translational modifications for many eukaryotic proteins, the HMT-1 could be postulated as one of the housekeeping genes, but its transcriptional regulation remains to be investigated. Here we screened a 1 kb region upstream from HMT-1 open reading frame (ORF) for transcriptionally regulatory sequences by using chloramphenicol acetyl transferase (CAT) assay, and found that the region from -33 to -1 positions might act in HMT-1 transcription at basal level and that the region from -200 to -42 should regulate its transcription either positively or negatively. In addition, results with CAT assays suggested the possibility that two GATA-1 motifs and an Sp1 motif within a 200 bp region upstream from HMT-1 ORF might significantly upregulate HMT-1 transcription. On the contrary, the observations obtained from site-directed mutational analyses revealed that an NF-1/AP-2 overlapping motif located at -148 to -134 positions should serve as a strong silencer. The control of the HMT-1 transcription by these motifs resided within the 200 bp region could partially explain the variation of expression level among various human tissues, suggesting availability and importance of this region for regulatory role in HMT-1 expression.
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