[English] 日本語
Yorodumi- PDB-6s7o: Cryo-EM structure of human oligosaccharyltransferase complex OST-A -
+
Open data
-
Basic information
| Entry | Database: PDB / ID: 6s7o | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Title | Cryo-EM structure of human oligosaccharyltransferase complex OST-A | |||||||||
Components |
| |||||||||
Keywords | TRANSFERASE / N-glycosylation / Oligosaccharyltransferase / OSTA | |||||||||
| Function / homology | Function and homology informationoligosaccharyltransferase complex binding / oligosaccharyltransferase complex A / oligosaccharyltransferase complex B / Asparagine N-linked glycosylation / oligosaccharyltransferase complex / dolichyl-diphosphooligosaccharide-protein glycotransferase / dolichyl-diphosphooligosaccharide-protein glycotransferase activity / protein N-linked glycosylation via asparagine / : / protein N-linked glycosylation ...oligosaccharyltransferase complex binding / oligosaccharyltransferase complex A / oligosaccharyltransferase complex B / Asparagine N-linked glycosylation / oligosaccharyltransferase complex / dolichyl-diphosphooligosaccharide-protein glycotransferase / dolichyl-diphosphooligosaccharide-protein glycotransferase activity / protein N-linked glycosylation via asparagine / : / protein N-linked glycosylation / epithelial cell apoptotic process / azurophil granule membrane / : / Advanced glycosylation endproduct receptor signaling / blastocyst development / SRP-dependent cotranslational protein targeting to membrane / rough endoplasmic reticulum / response to cytokine / post-translational protein modification / response to endoplasmic reticulum stress / T cell activation / enzyme activator activity / regulation of protein stability / protein modification process / melanosome / transferase activity / protein-macromolecule adaptor activity / Maturation of spike protein / nuclear body / inflammatory response / intracellular membrane-bounded organelle / apoptotic process / Neutrophil degranulation / endoplasmic reticulum membrane / negative regulation of apoptotic process / endoplasmic reticulum / RNA binding / metal ion binding / membrane / plasma membrane / cytoplasm / cytosol Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 Å | |||||||||
Authors | Ramirez, A.S. / Kowal, J. / Locher, K.P. | |||||||||
| Funding support | Switzerland, 1items
| |||||||||
Citation | Journal: Science / Year: 2019Title: Cryo-electron microscopy structures of human oligosaccharyltransferase complexes OST-A and OST-B. Authors: Ana S Ramírez / Julia Kowal / Kaspar P Locher / ![]() Abstract: Oligosaccharyltransferase (OST) catalyzes the transfer of a high-mannose glycan onto secretory proteins in the endoplasmic reticulum. Mammals express two distinct OST complexes that act in a ...Oligosaccharyltransferase (OST) catalyzes the transfer of a high-mannose glycan onto secretory proteins in the endoplasmic reticulum. Mammals express two distinct OST complexes that act in a cotranslational (OST-A) or posttranslocational (OST-B) manner. Here, we present high-resolution cryo-electron microscopy structures of human OST-A and OST-B. Although they have similar overall architectures, structural differences in the catalytic subunits STT3A and STT3B facilitate contacts to distinct OST subunits, DC2 in OST-A and MAGT1 in OST-B. In OST-A, interactions with TMEM258 and STT3A allow ribophorin-I to form a four-helix bundle that can bind to a translating ribosome, whereas the equivalent region is disordered in OST-B. We observed an acceptor peptide and dolichylphosphate bound to STT3B, but only dolichylphosphate in STT3A, suggesting distinct affinities of the two OST complexes for protein substrates. | |||||||||
| History |
|
-
Structure visualization
| Movie |
Movie viewer |
|---|---|
| Structure viewer | Molecule: Molmil Jmol/JSmol |
-
Downloads & links
-
Download
| PDBx/mmCIF format | 6s7o.cif.gz | 428.3 KB | Display | PDBx/mmCIF format |
|---|---|---|---|---|
| PDB format | pdb6s7o.ent.gz | 337.3 KB | Display | PDB format |
| PDBx/mmJSON format | 6s7o.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 6s7o_validation.pdf.gz | 2.1 MB | Display | wwPDB validaton report |
|---|---|---|---|---|
| Full document | 6s7o_full_validation.pdf.gz | 2.2 MB | Display | |
| Data in XML | 6s7o_validation.xml.gz | 83.8 KB | Display | |
| Data in CIF | 6s7o_validation.cif.gz | 118.4 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/s7/6s7o ftp://data.pdbj.org/pub/pdb/validation_reports/s7/6s7o | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 10110MC ![]() 6s7tC M: map data used to model this data C: citing same article ( |
|---|---|
| Similar structure data |
-
Links
-
Assembly
| Deposited unit | ![]()
|
|---|---|
| 1 |
|
-
Components
-Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit ... , 5 types, 5 molecules ABDEF
| #1: Protein | Mass: 80607.320 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)References: UniProt: P46977, dolichyl-diphosphooligosaccharide-protein glycotransferase |
|---|---|
| #2: Protein/peptide | Mass: 4196.004 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P0C6T2 |
| #4: Protein | Mass: 12503.631 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P61803 |
| #5: Protein | Mass: 68656.156 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P04843 |
| #6: Protein | Mass: 69347.508 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P04844 |
-Protein , 3 types, 3 molecules CGH
| #3: Protein | Mass: 9083.804 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P61165 |
|---|---|
| #7: Protein | Mass: 50754.438 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: A0A024RAD5, UniProt: P39656*PLUS |
| #8: Protein | Mass: 16844.215 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: OSTC, DC2, HDCMD45P, HSPC307 / Production host: Homo sapiens (human) / References: UniProt: Q9NRP0 |
-Sugars , 3 types, 3 molecules
| #9: Polysaccharide | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source |
|---|---|
| #10: Polysaccharide | alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D- ...alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)-alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source |
| #11: Polysaccharide | alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-[alpha-D- ...alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source |
-Non-polymers , 4 types, 19 molecules 






| #12: Chemical | ChemComp-KZB / ( #13: Chemical | ChemComp-EGY / ( #14: Chemical | #15: Chemical | ChemComp-KZE / [( | |
|---|
-Details
| Has ligand of interest | N |
|---|---|
| Has protein modification | Y |
-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
|---|---|
| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-
Sample preparation
| Component |
| ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Molecular weight | Experimental value: NO | ||||||||||||||||||||||||
| Source (natural) |
| ||||||||||||||||||||||||
| Source (recombinant) | Organism: Homo sapiens (human) | ||||||||||||||||||||||||
| Buffer solution | pH: 7.5 | ||||||||||||||||||||||||
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||
| Vitrification | Cryogen name: ETHANE-PROPANE |
-
Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
|---|---|
| Microscopy | Model: FEI TITAN KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Cs: 2.7 mm / Alignment procedure: COMA FREE |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Average exposure time: 8 sec. / Electron dose: 68 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 3 / Num. of real images: 6035 |
| EM imaging optics | Energyfilter name: GIF Quantum LS / Energyfilter slit width: 20 eV |
| Image scans | Movie frames/image: 40 |
-
Processing
| EM software |
| ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 424817 | ||||||||||||||||||||||||||||
| Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 156950 / Symmetry type: POINT |
Movie
Controller
About Yorodumi



Homo sapiens (human)
Switzerland, 1items
Citation
UCSF Chimera








PDBj







