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Open data
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Basic information
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| Title | Tra1, Core and minimal HAT modules of ctSAGA, composite. | |||||||||
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Keywords | ctSAGA complex / Histone Acetyl Transferase (HAT) Module / Tra1 module and Core module / TRANSCRIPTION | |||||||||
| Function / homology | Function and homology informationSAGA-type complex / RITS complex assembly / regulatory ncRNA-mediated heterochromatin formation / SLIK (SAGA-like) complex / histone H3 acetyltransferase activity / SAGA complex / RNA polymerase II general transcription initiation factor activity / transcription factor TFIID complex / NuA4 histone acetyltransferase complex / histone acetyltransferase complex ...SAGA-type complex / RITS complex assembly / regulatory ncRNA-mediated heterochromatin formation / SLIK (SAGA-like) complex / histone H3 acetyltransferase activity / SAGA complex / RNA polymerase II general transcription initiation factor activity / transcription factor TFIID complex / NuA4 histone acetyltransferase complex / histone acetyltransferase complex / histone acetyltransferase / RNA polymerase II preinitiation complex assembly / translation initiation factor activity / TBP-class protein binding / transcription coregulator activity / transcription initiation at RNA polymerase II promoter / promoter-specific chromatin binding / chromatin organization / transcription by RNA polymerase II / transcription coactivator activity / chromatin remodeling / 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 / zinc ion binding / nucleus Similarity search - Function | |||||||||
| Biological species | Thermochaetoides thermophila (fungus) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.5 Å | |||||||||
Authors | Mattoo RUH / Chen DH / Bushnell DA / Tamir S / Kornberg RD | |||||||||
| Funding support | United States, 1 items
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Citation | Journal: Mol Cell / Year: 2025Title: Structure of the transcriptional co-activator SAGA complex, including the histone acetyltransferase module. Authors: Rayees U H Mattoo / Dong-Hua Chen / David A Bushnell / Sagi Tamir / Roger D Kornberg / ![]() Abstract: The Spt-Ada-Gcn5 acetyltransferase (SAGA) complex, a 1.8 MDa multi-subunit assembly comprising 19 subunits, is required for RNA polymerase II transcription in eukaryotes. The complex consists of four ...The Spt-Ada-Gcn5 acetyltransferase (SAGA) complex, a 1.8 MDa multi-subunit assembly comprising 19 subunits, is required for RNA polymerase II transcription in eukaryotes. The complex consists of four modules: transcription-associated protein 1 (Tra1), core, deubiquitination (DUB), and histone acetyltransferase (HAT). Although the structures of the Tra1, core, and DUB modules have been determined, the overall architecture of the HAT module remained elusive due to its inherent flexibility. To address this, we conducted cryo-electron microscopy (cryo-EM) analyses on SAGA purified from the thermophilic fungus Chaetomium thermophilum, yielding structures of Tra1 and core modules at 2.6 Å and three of the four HAT subunits at 3.7 Å. The structure of the HAT module was informative about the aspects of histone acetylation and the interface of HAT-core modules, contradicting earlier AlphaFold predictions. Our structure-guided genetic and biochemical analyses confirmed the roles of Ada1 and Spt7 in anchoring the HAT module within the SAGA complex. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_73236.map.gz | 214.8 MB | EMDB map data format | |
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| Header (meta data) | emd-73236-v30.xml emd-73236.xml | 37.6 KB 37.6 KB | Display Display | EMDB header |
| Images | emd_73236.png | 67.6 KB | ||
| Filedesc metadata | emd-73236.cif.gz | 13.6 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-73236 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-73236 | HTTPS FTP |
-Validation report
| Summary document | emd_73236_validation.pdf.gz | 462.7 KB | Display | EMDB validaton report |
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| Full document | emd_73236_full_validation.pdf.gz | 462.3 KB | Display | |
| Data in XML | emd_73236_validation.xml.gz | 4.6 KB | Display | |
| Data in CIF | emd_73236_validation.cif.gz | 5.3 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-73236 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-73236 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9ynwMC ![]() 9ynuC ![]() 9ynvC ![]() 9yolC ![]() 9yoqC ![]() 9yzyC C: citing same article ( M: atomic model generated by this map |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_73236.map.gz / Format: CCP4 / Size: 446.8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. generated in cubic-lattice coordinate | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.041 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : Tra1 module of ctSAGA complex
+Supramolecule #1: Tra1 module of ctSAGA complex
+Macromolecule #1: Non-specific serine/threonine protein kinase
+Macromolecule #2: Spt20-like SEP domain-containing protein
+Macromolecule #3: Uncharacterized protein
+Macromolecule #4: Transcription initiation factor TFIID subunit 5
+Macromolecule #5: Transcription initiation factor TFIID subunit 6
+Macromolecule #6: Putative transcription initiation factor
+Macromolecule #7: Transcription initiation factor TFIID subunit 10
+Macromolecule #8: Transcription initiation factor TFIID subunit 12
+Macromolecule #9: Putative transcriptional activator protein
+Macromolecule #10: SCA7 domain-containing protein
+Macromolecule #11: Putative transcriptional coactivator HFI1 protein
+Macromolecule #12: Transcriptional adapter 2
+Macromolecule #13: histone acetyltransferase
+Macromolecule #14: Uncharacterized protein
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.5 |
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| Sugar embedding | Material: HEPES Buffer |
| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | TFS KRIOS |
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| Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 68.9 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: OTHER / Imaging mode: OTHER / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.2 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi




Keywords
Thermochaetoides thermophila (fungus)
Authors
United States, 1 items
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Processing
FIELD EMISSION GUN
