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Open data
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Basic information
| Entry | Database: PDB / ID: 6tb4 | ||||||||||||
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| Title | Structure of SAGA bound to TBP | ||||||||||||
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Keywords | TRANSCRIPTION / Transcriptional co-activator / Histone-acetylation | ||||||||||||
| Function / homology | Function and homology informationregulation of biosynthetic process / RNA polymerase I transcription regulator complex / RITS complex assembly / positive regulation of DNA-templated transcription initiation / regulatory ncRNA-mediated heterochromatin formation / RNA polymerase III type 3 promoter sequence-specific DNA binding / SLIK (SAGA-like) complex / SAGA complex / RNA polymerase II general transcription initiation factor activity / transcription factor TFIID complex ...regulation of biosynthetic process / RNA polymerase I transcription regulator complex / RITS complex assembly / positive regulation of DNA-templated transcription initiation / regulatory ncRNA-mediated heterochromatin formation / RNA polymerase III type 3 promoter sequence-specific DNA binding / SLIK (SAGA-like) complex / SAGA complex / RNA polymerase II general transcription initiation factor activity / transcription factor TFIID complex / NuA4 histone acetyltransferase complex / transcription initiation at RNA polymerase I promoter / RNA polymerase II core promoter sequence-specific DNA binding / RNA polymerase II preinitiation complex assembly / TBP-class protein binding / transcription coregulator activity / transcription initiation at RNA polymerase II promoter / promoter-specific chromatin binding / chromatin organization / molecular adaptor activity / RNA polymerase II-specific DNA-binding transcription factor binding / transcription by RNA polymerase II / transcription coactivator activity / protein heterodimerization activity / DNA repair / chromatin binding / regulation of DNA-templated transcription / regulation of transcription by RNA polymerase II / structural molecule activity / positive regulation of transcription by RNA polymerase II / DNA binding / identical protein binding / nucleus / cytosol Similarity search - Function | ||||||||||||
| Biological species | Komagataella phaffii (fungus) Komagataella phaffii GS115 (fungus) | ||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å | ||||||||||||
Authors | Papai, G. / Frechard, A. / Kolesnikova, O. / Crucifix, C. / Schultz, P. / Ben-Shem, A. | ||||||||||||
| Funding support | France, 3items
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Citation | Journal: Nature / Year: 2020Title: Structure of SAGA and mechanism of TBP deposition on gene promoters. Authors: Gabor Papai / Alexandre Frechard / Olga Kolesnikova / Corinne Crucifix / Patrick Schultz / Adam Ben-Shem / ![]() Abstract: SAGA (Spt-Ada-Gcn5-acetyltransferase) is a 19-subunit complex that stimulates transcription via two chromatin-modifying enzymatic modules and by delivering the TATA box binding protein (TBP) to ...SAGA (Spt-Ada-Gcn5-acetyltransferase) is a 19-subunit complex that stimulates transcription via two chromatin-modifying enzymatic modules and by delivering the TATA box binding protein (TBP) to nucleate the pre-initiation complex on DNA, a pivotal event in the expression of protein-encoding genes. Here we present the structure of yeast SAGA with bound TBP. The core of the complex is resolved at 3.5 Å resolution (0.143 Fourier shell correlation). The structure reveals the intricate network of interactions that coordinate the different functional domains of SAGA and resolves an octamer of histone-fold domains at the core of SAGA. This deformed octamer deviates considerably from the symmetrical analogue in the nucleosome and is precisely tuned to establish a peripheral site for TBP, where steric hindrance represses binding of spurious DNA. Complementary biochemical analysis points to a mechanism for TBP delivery and release from SAGA that requires transcription factor IIA and whose efficiency correlates with the affinity of DNA to TBP. We provide the foundations for understanding the specific delivery of TBP to gene promoters and the multiple roles of SAGA in regulating gene expression. | ||||||||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 6tb4.cif.gz | 1004.4 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb6tb4.ent.gz | 758.2 KB | Display | PDB format |
| PDBx/mmJSON format | 6tb4.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 6tb4_validation.pdf.gz | 1.4 MB | Display | wwPDB validaton report |
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| Full document | 6tb4_full_validation.pdf.gz | 1.5 MB | Display | |
| Data in XML | 6tb4_validation.xml.gz | 145.2 KB | Display | |
| Data in CIF | 6tb4_validation.cif.gz | 223.1 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/tb/6tb4 ftp://data.pdbj.org/pub/pdb/validation_reports/tb/6tb4 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 10438MC ![]() 6tbmC M: map data used to model this data C: citing same article ( |
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| Similar structure data |
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Assembly
| Deposited unit | ![]()
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Components
-Protein , 9 types, 9 molecules MCFJKGHIL
| #1: Protein | Mass: 26931.299 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)Production host: ![]() |
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| #3: Protein | Mass: 79995.227 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / Strain: GS115 / ATCC 20864 / References: UniProt: C4QZ39*PLUS |
| #4: Protein | Mass: 59530.578 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)Strain: GS115 / ATCC 20864 / References: UniProt: C4QZ05 |
| #7: Protein | Mass: 23879.145 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)Strain: GS115 / ATCC 20864 / References: UniProt: C4QXP2 |
| #8: Protein | Mass: 66690.133 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)Strain: GS115 / ATCC 20864 / References: UniProt: C4R150 |
| #9: Protein | Mass: 80933.008 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)Strain: GS115 / ATCC 20864 / References: UniProt: C4R4L4 |
| #10: Protein | Mass: 54888.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)Strain: GS115 / ATCC 20864 / References: UniProt: C4QW33 |
| #11: Protein | Mass: 17303.576 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)Strain: GS115 / ATCC 20864 / References: UniProt: C4QZS5 |
| #12: Protein | Mass: 438055.344 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)Strain: GS115 / ATCC 20864 / References: UniProt: C4QYV4 |
-Transcriptional ... , 2 types, 2 molecules AB
| #2: Protein | Mass: 49888.273 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)Strain: GS115 / ATCC 20864 / References: UniProt: C4QZA3 |
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| #13: Protein | Mass: 6485.986 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / Strain: GS115 / ATCC 20864 |
-Subunit of the SAGA ... , 2 types, 2 molecules DE
| #5: Protein | Mass: 39030.105 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)Strain: GS115 / ATCC 20864 / References: UniProt: C4R3E4 |
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| #6: Protein | Mass: 136768.828 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Komagataella phaffii (strain GS115 / ATCC 20864) (fungus)Strain: GS115 / ATCC 20864 / References: UniProt: C4R5C7 |
-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
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| Molecular weight | Value: 1.6 MDa / Experimental value: YES | ||||||||||||||||||||||||
| Source (natural) |
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| Source (recombinant) | Organism: ![]() | ||||||||||||||||||||||||
| Buffer solution | pH: 8 | ||||||||||||||||||||||||
| Specimen | Conc.: 0.4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||
| Specimen support | Grid material: COPPER/RHODIUM / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/2 | ||||||||||||||||||||||||
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 283 K |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| 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 / Nominal magnification: 105000 X / Nominal defocus max: 3500 nm / Nominal defocus min: 1500 nm / Calibrated defocus min: 0.8 nm / Calibrated defocus max: 4.5 nm / Cs: 0.01 mm / C2 aperture diameter: 70 µm / Alignment procedure: ZEMLIN TABLEAU |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Average exposure time: 8 sec. / Electron dose: 52.8 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 QUANTUM (4k x 4k) |
| EM imaging optics | Energyfilter name: GIF Quantum LS / Energyfilter slit width: 20 eV |
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Processing
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||
| Particle selection | Num. of particles selected: 1068534 | ||||||||||||||||||||
| Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||
| 3D reconstruction | Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 354104 / Algorithm: FOURIER SPACE / Symmetry type: POINT | ||||||||||||||||||||
| Atomic model building | Protocol: OTHER |
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About Yorodumi




Komagataella phaffii (fungus)
France, 3items
Citation
UCSF Chimera











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