Congenital disorders of glycosylation (CDG) are severe inherited diseases in which aberrant protein glycosylation is a hallmark. From this genetically and clinically heterogenous group, a significant subgroup due to Golgi homeostasis defects is emerging. We previously identified TMEM165 as a Golgi protein involved in CDG. Extremely conserved in the eukaryotic reign, the molecular mechanism by which TMEM165 deficiencies lead to Golgi glycosylation abnormalities is enigmatic. AsGDT1 is the ortholog of TMEM165 in yeast, both gdt1Δ null mutant yeasts and TMEM165 depleted cells were used. We highlighted that the observed Golgi glycosylation defects due to Gdt1p/TMEM165 deficiency result from Golgi manganese homeostasis defect. We discovered that in both yeasts and mammalian Gdt1p/TMEM165-deficient cells, Mn(2+) supplementation could restore a normal glycosylation. We also showed that the GPP130 Mn(2+) sensitivity was altered in TMEM165 depleted cells. This study not only provides novel insights into the molecular causes of glycosylation defects observed in TMEM165-deficient cells but also suggest that TMEM165 is a key determinant for the regulation of Golgi Mn(2+) homeostasis.
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Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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Site | Modification | Modifier | Source | Reference |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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Evidence ID | Analyze ID | File | Description |
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