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- PDB-5oej: Structure of Tra1 subunit within the chromatin modifying complex SAGA -

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Basic information

Entry
Database: PDB / ID: 5oej
TitleStructure of Tra1 subunit within the chromatin modifying complex SAGA
ComponentsTra1 subunit within the chromatin modifying complex SAGA
KeywordsTRANSCRIPTION / yeast / Tra1 / SAGA / activator target
Function / homology
Function and homology information


: / histone acetyltransferase complex / transferase activity
Similarity search - Function
Transcription-associated protein 1 / Tra1, HEAT repeat ring region / Tra1, HEAT repeat central region / Tra1 HEAT repeat central region / Tra1 HEAT repeat ring region / PIK-related kinase, FAT / FAT domain / FATC / FATC domain / PIK-related kinase ...Transcription-associated protein 1 / Tra1, HEAT repeat ring region / Tra1, HEAT repeat central region / Tra1 HEAT repeat central region / Tra1 HEAT repeat ring region / PIK-related kinase, FAT / FAT domain / FATC / FATC domain / PIK-related kinase / FAT domain profile. / FATC domain profile. / Phosphatidylinositol 3-/4-kinase, catalytic domain superfamily / Phosphoinositide 3-kinase, catalytic domain / Phosphatidylinositol 3- and 4-kinase / Phosphatidylinositol 3- and 4-kinases catalytic domain profile. / Phosphatidylinositol 3-/4-kinase, catalytic domain / Armadillo-type fold / Protein kinase-like domain superfamily
Similarity search - Domain/homology
Transcription-associated protein / SAGA and NuA4 histone acetyltransferase complexes subunits
Similarity search - Component
Biological speciesKomagataella pastoris (fungus)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 5.7 Å
AuthorsSharov, G. / Voltz, K. / Durand, A. / Kolesnikova, O. / Papai, G. / Myasnikov, A.G. / Dejaegere, A. / Ben-Shem, A. / Schultz, P.
Funding support France, 2items
OrganizationGrant numberCountry
French Infrastructure for Integrated Structural Biology (FRISBI)ANR-10-INSB-05-01 France
French National Research AgencyANR-10-BINF-0003 France
CitationJournal: Nat Commun / Year: 2017
Title: Structure of the transcription activator target Tra1 within the chromatin modifying complex SAGA.
Authors: Grigory Sharov / Karine Voltz / Alexandre Durand / Olga Kolesnikova / Gabor Papai / Alexander G Myasnikov / Annick Dejaegere / Adam Ben Shem / Patrick Schultz /
Abstract: The transcription co-activator complex SAGA is recruited to gene promoters by sequence-specific transcriptional activators and by chromatin modifications to promote pre-initiation complex formation. ...The transcription co-activator complex SAGA is recruited to gene promoters by sequence-specific transcriptional activators and by chromatin modifications to promote pre-initiation complex formation. The yeast Tra1 subunit is the major target of acidic activators such as Gal4, VP16, or Gcn4 but little is known about its structural organization. The 430 kDa Tra1 subunit and its human homolog the transformation/transcription domain-associated protein TRRAP are members of the phosphatidyl 3-kinase-related kinase (PIKK) family. Here, we present the cryo-EM structure of the entire SAGA complex where the major target of activator binding, the 430 kDa Tra1 protein, is resolved with an average resolution of 5.7 Å. The high content of alpha-helices in Tra1 enabled tracing of the majority of its main chain. Our results highlight the integration of Tra1 within the major epigenetic regulator SAGA.
History
DepositionJul 7, 2017Deposition site: PDBE / Processing site: PDBE
Revision 1.0Aug 2, 2017Provider: repository / Type: Initial release
Revision 1.1Aug 9, 2017Group: Database references / Structure summary / Category: audit_author / citation_author / Item: _audit_author.name / _citation_author.name
Revision 1.2Sep 20, 2017Group: Database references / Category: pdbx_database_related / Item: _pdbx_database_related.db_id
Revision 1.3Nov 29, 2017Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.name

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Structure visualization

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Assembly

Deposited unit
B: Tra1 subunit within the chromatin modifying complex SAGA


Theoretical massNumber of molelcules
Total (without water)438,0551
Polymers438,0551
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Tra1 subunit within the chromatin modifying complex SAGA


Mass: 438055.344 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella pastoris (fungus) / References: UniProt: F2QQ15, UniProt: C4QYV4*PLUS

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Tra1 subunit of SAGA complex / Type: COMPLEX / Entity ID: all / Source: NATURAL
Molecular weightValue: 0.4 MDa / Experimental value: NO
Source (natural)Organism: Komagataella pastoris (fungus)
Buffer solutionpH: 8
SpecimenConc.: 0.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/2
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 277 K / Details: Blot for 1 second before plunging

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 59000 X / Calibrated magnification: 127272 X / Nominal defocus max: 3400 nm / Nominal defocus min: 1400 nm / Calibrated defocus min: 1400 nm / Calibrated defocus max: 3400 nm / Cs: 0.001 mm / C2 aperture diameter: 100 µm / Alignment procedure: ZEMLIN TABLEAU
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Temperature (max): 80 K / Temperature (min): 70 K
Image recordingAverage exposure time: 1 sec. / Electron dose: 60 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON II (4k x 4k) / Num. of grids imaged: 4 / Num. of real images: 8505
Details: Images were collected in movie-mode at 17 frames per second, frame 1 was not acquired. Every two frames were joined together, producing 8 frames per second.
EM imaging opticsSpherical aberration corrector: Microscope has a Cs corrector
Image scansSampling size: 14 µm / Width: 4096 / Height: 4096 / Movie frames/image: 8 / Used frames/image: 2-8

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Processing

EM software
IDNameVersionCategoryDetails
1Gautomatch0.53particle selectionWas used for auto-picking
2EPU1.4.3.1159RELimage acquisition
4Gctf0.5CTF correctionCTF estimation
5CTFFIND4.0.15CTF correctionCTF estimation
8UCSF Chimera1.9model fittingrigid-body with "fit in map" tool
9Situs2.6model fittingrigid-body with "colores" tool
12RELION1.4final Euler assignment
14RELION1.43D reconstruction
15Coot0.8.7model refinementreal-space refinement
16PHENIX1.11model refinementgeometry minimization
CTF correctionDetails: Full CTF correction in Relion / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 264901
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 5.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 105916 / Algorithm: FOURIER SPACE / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Details: Secondary structure restraints were applied in Phenix.
Atomic model buildingPDB-ID: 4JSN

4jsn


Pdb chain-ID: B / Pdb chain residue range: 1385-2549
RefinementHighest resolution: 5.7 Å

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