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- EMDB-12897: Nucleosome with TBP and TFIIA bound at SHL -6 -

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Basic information

Entry
Database: EMDB / ID: EMD-12897
TitleNucleosome with TBP and TFIIA bound at SHL -6
Map data3D refinement map from Relion
Sample
  • Complex: Nucleosome with TBP and TFIIA
    • Complex: Histone octamer
      • Protein or peptide: Histone H3.2
      • Protein or peptide: Histone H4
      • Protein or peptide: Histone H2A
      • Protein or peptide: Histone H2B 1.1
    • Complex: DNA (145-MER)
      • DNA: DNA (145-MER)
      • DNA: DNA (145-MER)
    • Complex: TBP
      • Protein or peptide: TATA-binding protein
    • Complex: TFIIA
      • Protein or peptide: Transcription initiation factor IIA large subunit
      • Protein or peptide: Transcription initiation factor IIA subunit 2
KeywordsDNA binding protein nucleosome / TRANSCRIPTION
Function / homology
Function and homology information


transcription factor TFIIA complex / RNA polymerase II transcribes snRNA genes / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening / RNA Polymerase II Transcription Initiation / RNA Polymerase II Transcription Initiation And Promoter Clearance / RNA polymerase II general transcription initiation factor activity / RNA Polymerase II Pre-transcription Events / Estrogen-dependent gene expression / positive regulation of transcription initiation by RNA polymerase II ...transcription factor TFIIA complex / RNA polymerase II transcribes snRNA genes / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening / RNA Polymerase II Transcription Initiation / RNA Polymerase II Transcription Initiation And Promoter Clearance / RNA polymerase II general transcription initiation factor activity / RNA Polymerase II Pre-transcription Events / Estrogen-dependent gene expression / positive regulation of transcription initiation by RNA polymerase II / 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 / DNA-templated transcription initiation / structural constituent of chromatin / nucleosome / heterochromatin formation / nucleosome assembly / transcription by RNA polymerase II / protein heterodimerization activity / positive regulation of transcription by RNA polymerase II / DNA binding / nucleoplasm / nucleus / cytoplasm
Similarity search - Function
Transcription factor IIA, alpha/beta subunit / Transcription factor IIA, alpha/beta subunit / Transcription factor IIA, alpha/beta subunit / Transcription initiation factor IIA, gamma subunit / Transcription factor IIA, alpha-helical domain / Transcription factor IIA, beta-barrel / Transcription initiation factor IIA, gamma subunit, C-terminal / Transcription initiation factor IIA, gamma subunit, N-terminal / Transcription initiation factor IIA, gamma subunit, helical domain / Transcription initiation factor IIA, gamma subunit ...Transcription factor IIA, alpha/beta subunit / Transcription factor IIA, alpha/beta subunit / Transcription factor IIA, alpha/beta subunit / Transcription initiation factor IIA, gamma subunit / Transcription factor IIA, alpha-helical domain / Transcription factor IIA, beta-barrel / Transcription initiation factor IIA, gamma subunit, C-terminal / Transcription initiation factor IIA, gamma subunit, N-terminal / Transcription initiation factor IIA, gamma subunit, helical domain / Transcription initiation factor IIA, gamma subunit / TATA-box binding protein, eukaryotic / TATA-box binding protein / TATA-box binding protein, conserved site / Transcription factor TFIID (or TATA-binding protein, TBP) / Transcription factor TFIID repeat signature. / TBP domain superfamily / : / Histone H2B signature. / Histone H2A conserved site / Histone H2A signature. / Histone H2B / Histone H2B / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone 2A / Histone H2A / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF), histone-like fold domain / Histone H4, conserved site / Histone H4 signature. / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold / Centromere kinetochore component CENP-T histone fold / Histone H3 signature 1. / Histone H3 signature 2. / Histone H3 / Histone H3/CENP-A / Histone H2A/H2B/H3 / Core histone H2A/H2B/H3/H4 domain / Histone-fold
Similarity search - Domain/homology
Transcription initiation factor IIA subunit 2 / TATA-binding protein / Histone H2B 1.1 / Transcription initiation factor IIA large subunit / Histone H4 / Histone H3.2 / Histone H2A
Similarity search - Component
Biological speciesXenopus laevis (African clawed frog) / synthetic construct (others) / Saccharomyces cerevisiae (brewer's yeast)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.0 Å
AuthorsWang H / Cramer P
Funding support Germany, European Union, 2 items
OrganizationGrant numberCountry
German Research Foundation (DFG)SFB860, SPP2191, EXC 2067/1-390729940 Germany
European Research Council (ERC)882357European Union
CitationJournal: Proc Natl Acad Sci U S A / Year: 2021
Title: Structures and implications of TBP-nucleosome complexes.
Authors: Haibo Wang / Le Xiong / Patrick Cramer /
Abstract: The TATA box-binding protein (TBP) is highly conserved throughout eukaryotes and plays a central role in the assembly of the transcription preinitiation complex (PIC) at gene promoters. TBP binds and ...The TATA box-binding protein (TBP) is highly conserved throughout eukaryotes and plays a central role in the assembly of the transcription preinitiation complex (PIC) at gene promoters. TBP binds and bends DNA, and directs adjacent binding of the transcription factors TFIIA and TFIIB for PIC assembly. Here, we show that yeast TBP can bind to a nucleosome containing the Widom-601 sequence and that TBP-nucleosome binding is stabilized by TFIIA. We determine three cryo-electron microscopy (cryo-EM) structures of TBP-nucleosome complexes, two of them containing also TFIIA. TBP can bind to superhelical location (SHL) -6, which contains a TATA-like sequence, but also to SHL +2, which is GC-rich. Whereas binding to SHL -6 can occur in the absence of TFIIA, binding to SHL +2 is only observed in the presence of TFIIA and goes along with detachment of upstream terminal DNA from the histone octamer. TBP-nucleosome complexes are sterically incompatible with PIC assembly, explaining why a promoter nucleosome generally impairs transcription and must be moved before initiation can occur.
History
DepositionMay 9, 2021-
Header (metadata) releaseJul 28, 2021-
Map releaseJul 28, 2021-
UpdateJul 2, 2025-
Current statusJul 2, 2025Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.0125
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.0125
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7oh9
  • Surface level: 0.0125
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_12897.png

Downloads & links

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Map

FileDownload / File: emd_12897.map.gz / Format: CCP4 / Size: 30.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotation3D refinement map from Relion
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.05 Å/pix.
x 200 pix.
= 210. Å		1.05 Å/pix.
x 200 pix.
= 210. Å		1.05 Å/pix.
x 200 pix.
= 210. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.05 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0125 / Movie #1: 0.0125
Minimum - Maximum-0.028729605 - 0.07551691
Average (Standard dev.)0.0004665506 (±0.00326082)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions200200200
Spacing200200200
CellA=B=C: 209.99998 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.051.051.05
M x/y/z200200200
origin x/y/z0.0000.0000.000
length x/y/z210.000210.000210.000
α/β/γ90.00090.00090.000
start NX/NY/NZ1331310
NX/NY/NZ223226424
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS200200200
D min/max/mean-0.0290.0760.000

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Supplemental data

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Sample components

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Entire : Nucleosome with TBP and TFIIA

EntireName: Nucleosome with TBP and TFIIA
Components
  • Complex: Nucleosome with TBP and TFIIA
    • Complex: Histone octamer
      • Protein or peptide: Histone H3.2
      • Protein or peptide: Histone H4
      • Protein or peptide: Histone H2A
      • Protein or peptide: Histone H2B 1.1
    • Complex: DNA (145-MER)
      • DNA: DNA (145-MER)
      • DNA: DNA (145-MER)
    • Complex: TBP
      • Protein or peptide: TATA-binding protein
    • Complex: TFIIA
      • Protein or peptide: Transcription initiation factor IIA large subunit
      • Protein or peptide: Transcription initiation factor IIA subunit 2

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Supramolecule #1: Nucleosome with TBP and TFIIA

SupramoleculeName: Nucleosome with TBP and TFIIA / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#9
Molecular weightTheoretical: 230 KDa

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Supramolecule #2: Histone octamer

SupramoleculeName: Histone octamer / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#4
Source (natural)Organism: Xenopus laevis (African clawed frog)

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Supramolecule #3: DNA (145-MER)

SupramoleculeName: DNA (145-MER) / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #5-#6
Source (natural)Organism: synthetic construct (others)

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Supramolecule #4: TBP

SupramoleculeName: TBP / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #7
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)

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Supramolecule #5: TFIIA

SupramoleculeName: TFIIA / type: complex / ID: 5 / Parent: 1 / Macromolecule list: #8-#9
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)

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Macromolecule #1: Histone H3.2

MacromoleculeName: Histone H3.2 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 15.30393 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
ARTKQTARKS TGGKAPRKQL ATKAARKSAP ATGGVKKPHR YRPGTVALRE IRRYQKSTEL LIRKLPFQRL VREIAQDFKT DLRFQSSAV MALQEASEAY LVALFEDTNL CAIHAKRVTI MPKDIQLARR IRGERA

UniProtKB: Histone H3.2

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Macromolecule #2: Histone H4

MacromoleculeName: Histone H4 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 11.263231 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
SGRGKGGKGL GKGGAKRHRK VLRDNIQGIT KPAIRRLARR GGVKRISGLI YEETRGVLKV FLENVIRDAV TYTEHAKRKT VTAMDVVYA LKRQGRTLYG FGG

UniProtKB: Histone H4

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Macromolecule #3: Histone H2A

MacromoleculeName: Histone H2A / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 13.978241 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
SGRGKQGGKT RAKAKTRSSR AGLQFPVGRV HRLLRKGNYA ERVGAGAPVY LAAVLEYLTA EILELAGNAA RDNKKTRIIP RHLQLAVRN DEELNKLLGR VTIAQGGVLP NIQSVLLPKK TESSKSAKSK

UniProtKB: Histone H2A

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Macromolecule #4: Histone H2B 1.1

MacromoleculeName: Histone H2B 1.1 / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Xenopus laevis (African clawed frog)
Molecular weightTheoretical: 13.524752 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
AKSAPAPKKG SKKAVTKTQK KDGKKRRKTR KESYAIYVYK VLKQVHPDTG ISSKAMSIMN SFVNDVFERI AGEASRLAHY NKRSTITSR EIQTAVRLLL PGELAKHAVS EGTKAVTKYT SAK

UniProtKB: Histone H2B 1.1

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Macromolecule #7: TATA-binding protein

MacromoleculeName: TATA-binding protein / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Molecular weightTheoretical: 27.042275 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MADEERLKEF KEANKIVFDP NTRQVWENQN RDGTKPATTF QSEEDIKRAA PESEKDTSAT SGIVPTLQNI VATVTLGCRL DLKTVALHA RNAEYNPKRF AAVIMRIREP KTTALIFASG KMVVTGAKSE DDSKLASRKY ARIIQKIGFA AKFTDFKIQN I VGSCDVKF ...String:
MADEERLKEF KEANKIVFDP NTRQVWENQN RDGTKPATTF QSEEDIKRAA PESEKDTSAT SGIVPTLQNI VATVTLGCRL DLKTVALHA RNAEYNPKRF AAVIMRIREP KTTALIFASG KMVVTGAKSE DDSKLASRKY ARIIQKIGFA AKFTDFKIQN I VGSCDVKF PIRLEGLAFS HGTFSSYEPE LFPGLIYRMV KPKIVLLIFV SGKIVLTGAK QREEIYQAFE AIYPVLSEFR KM

UniProtKB: TATA-binding protein

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Macromolecule #8: Transcription initiation factor IIA large subunit

MacromoleculeName: Transcription initiation factor IIA large subunit / type: protein_or_peptide / ID: 8
Details: yeast Toa1 protein with the disorder region from residue 96 to 209 removed.
Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Molecular weightTheoretical: 19.432029 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MSNAEASRVY EIIVESVVNE VREDFENAGI DEQTLQDLKN IWQKKLTETK VTTFSWDNQF NEGNINGVQN DLNFNLATPG VNSSEFNIK EENTGSALLD TDEVGSELDD SDDDYLISEG EEDGPDENLM LCLYDKVTRT KARWKCSLKD GVVTINRNDY T FQKAQVEA EWV

UniProtKB: Transcription initiation factor IIA large subunit

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Macromolecule #9: Transcription initiation factor IIA subunit 2

MacromoleculeName: Transcription initiation factor IIA subunit 2 / type: protein_or_peptide / ID: 9 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Molecular weightTheoretical: 13.47307 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MAVPGYYELY RRSTIGNSLV DALDTLISDG RIEASLAMRV LETFDKVVAE TLKDNTQSKL TVKGNLDTYG FCDDVWTFIV KNCQVTVED SHRDASQNGS GDSQSVISVD KLRIVACNSK KSE

UniProtKB: Transcription initiation factor IIA subunit 2

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Macromolecule #5: DNA (145-MER)

MacromoleculeName: DNA (145-MER) / type: dna / ID: 5 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 44.520383 KDa
SequenceString: (DA)(DT)(DC)(DA)(DG)(DA)(DA)(DT)(DC)(DC) (DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA)(DG) (DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA)(DA) (DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA)(DG) (DA) (DC)(DA)(DG)(DC)(DT)(DC) ...String:
(DA)(DT)(DC)(DA)(DG)(DA)(DA)(DT)(DC)(DC) (DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA)(DG) (DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA)(DA) (DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA)(DG) (DA) (DC)(DA)(DG)(DC)(DT)(DC)(DT)(DA) (DG)(DC)(DA)(DC)(DC)(DG)(DC)(DT)(DT)(DA) (DA)(DA) (DC)(DG)(DC)(DA)(DC)(DG)(DT) (DA)(DC)(DG)(DC)(DG)(DC)(DT)(DG)(DT)(DC) (DC)(DC)(DC) (DC)(DG)(DC)(DG)(DT)(DT) (DT)(DT)(DA)(DA)(DC)(DC)(DG)(DC)(DC)(DA) (DA)(DG)(DG)(DG) (DG)(DA)(DT)(DT)(DA) (DC)(DT)(DC)(DC)(DC)(DT)(DA)(DG)(DT)(DC) (DT)(DC)(DC)(DA)(DG) (DG)(DC)(DA)(DC) (DG)(DT)(DG)(DT)(DC)(DA)(DG)(DA)(DT)(DA) (DT)(DA)(DT)(DA)(DC)(DA) (DT)(DC)(DG) (DA)(DT)

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Macromolecule #6: DNA (145-MER)

MacromoleculeName: DNA (145-MER) / type: dna / ID: 6 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 44.99166 KDa
SequenceString: (DA)(DT)(DC)(DG)(DA)(DT)(DG)(DT)(DA)(DT) (DA)(DT)(DA)(DT)(DC)(DT)(DG)(DA)(DC)(DA) (DC)(DG)(DT)(DG)(DC)(DC)(DT)(DG)(DG) (DA)(DG)(DA)(DC)(DT)(DA)(DG)(DG)(DG)(DA) (DG) (DT)(DA)(DA)(DT)(DC)(DC) ...String:
(DA)(DT)(DC)(DG)(DA)(DT)(DG)(DT)(DA)(DT) (DA)(DT)(DA)(DT)(DC)(DT)(DG)(DA)(DC)(DA) (DC)(DG)(DT)(DG)(DC)(DC)(DT)(DG)(DG) (DA)(DG)(DA)(DC)(DT)(DA)(DG)(DG)(DG)(DA) (DG) (DT)(DA)(DA)(DT)(DC)(DC)(DC)(DC) (DT)(DT)(DG)(DG)(DC)(DG)(DG)(DT)(DT)(DA) (DA)(DA) (DA)(DC)(DG)(DC)(DG)(DG)(DG) (DG)(DG)(DA)(DC)(DA)(DG)(DC)(DG)(DC)(DG) (DT)(DA)(DC) (DG)(DT)(DG)(DC)(DG)(DT) (DT)(DT)(DA)(DA)(DG)(DC)(DG)(DG)(DT)(DG) (DC)(DT)(DA)(DG) (DA)(DG)(DC)(DT)(DG) (DT)(DC)(DT)(DA)(DC)(DG)(DA)(DC)(DC)(DA) (DA)(DT)(DT)(DG)(DA) (DG)(DC)(DG)(DG) (DC)(DC)(DT)(DC)(DG)(DG)(DC)(DA)(DC)(DC) (DG)(DG)(DG)(DA)(DT)(DT) (DC)(DT)(DG) (DA)(DT)

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration0.12 mg/mL
BufferpH: 7.5
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 41.2 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup model#0 - Type of model: PDB ENTRY
#0 - PDB model - PDB ID:

3lz0


#1 - Type of model: PDB ENTRY
#1 - PDB model - PDB ID:

1nh2

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.0 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 85777
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION
FSC plot (resolution estimation)

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Atomic model buiding 1

RefinementSpace: REAL / Protocol: RIGID BODY FIT
Output model

PDB-7oh9:
Nucleosome with TBP and TFIIA bound at SHL -6

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