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- PDB-9ehz: Cryo-EM structure of Human RNA polymerase II Elongation Complex i... -

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Entry
Database: PDB / ID: 9ehz
TitleCryo-EM structure of Human RNA polymerase II Elongation Complex in an Intermediate Translocation State
Components
  • (DNA-directed RNA polymerase II subunit ...) x 7
  • (DNA-directed RNA polymerases I, II, and III subunit ...) x 5
  • Non-template DNA, nucleic acid scaffold
  • RNA, nucleic acid scaffold
  • Template DNA, nucleic acid scaffold
KeywordsTRANSCRIPTION / TRANSFERASE/DNA/RNA / translocation / Human RNA polymerase II / TRANSFERASE-DNA-RNA complex
Function / homology
Function and homology information


LRR domain binding / microfibril binding / RNA Polymerase III Chain Elongation / RNA Polymerase III Transcription Termination / regulation of transcription by RNA polymerase I / RPAP3/R2TP/prefoldin-like complex / Cytosolic sensors of pathogen-associated DNA / RNA Polymerase III Transcription Initiation From Type 1 Promoter / RNA Polymerase III Transcription Initiation From Type 2 Promoter / RNA Polymerase III Transcription Initiation From Type 3 Promoter ...LRR domain binding / microfibril binding / RNA Polymerase III Chain Elongation / RNA Polymerase III Transcription Termination / regulation of transcription by RNA polymerase I / RPAP3/R2TP/prefoldin-like complex / Cytosolic sensors of pathogen-associated DNA / RNA Polymerase III Transcription Initiation From Type 1 Promoter / RNA Polymerase III Transcription Initiation From Type 2 Promoter / RNA Polymerase III Transcription Initiation From Type 3 Promoter / RNA Polymerase III Abortive And Retractive Initiation / Abortive elongation of HIV-1 transcript in the absence of Tat / FGFR2 alternative splicing / RNA Polymerase I Transcription Termination / MicroRNA (miRNA) biogenesis / Viral Messenger RNA Synthesis / Signaling by FGFR2 IIIa TM / RNA Pol II CTD phosphorylation and interaction with CE during HIV infection / RNA Pol II CTD phosphorylation and interaction with CE / positive regulation of nuclear-transcribed mRNA poly(A) tail shortening / PIWI-interacting RNA (piRNA) biogenesis / Formation of the Early Elongation Complex / Formation of the HIV-1 Early Elongation Complex / mRNA Capping / HIV Transcription Initiation / RNA Polymerase II HIV Promoter Escape / Transcription of the HIV genome / 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 / mRNA Splicing - Minor Pathway / transcription by RNA polymerase I / RNA Polymerase I Transcription Initiation / maintenance of transcriptional fidelity during transcription elongation by RNA polymerase II / Pausing and recovery of Tat-mediated HIV elongation / Tat-mediated HIV elongation arrest and recovery / Processing of Capped Intron-Containing Pre-mRNA / nuclear-transcribed mRNA catabolic process / transcription by RNA polymerase III / positive regulation of translational initiation / HIV elongation arrest and recovery / Pausing and recovery of HIV elongation / RNA polymerase II transcribes snRNA genes / : / transcription elongation by RNA polymerase I / Tat-mediated elongation of the HIV-1 transcript / Formation of HIV-1 elongation complex containing HIV-1 Tat / tRNA transcription by RNA polymerase III / RNA polymerase I complex / RNA polymerase III complex / Formation of HIV elongation complex in the absence of HIV Tat / RNA polymerase II, core complex / transcription-coupled nucleotide-excision repair / RNA Polymerase II Transcription Elongation / Formation of RNA Pol II elongation complex / translation initiation factor binding / RNA Polymerase II Pre-transcription Events / Inhibition of DNA recombination at telomere / mRNA Splicing - Major Pathway / positive regulation of RNA splicing / TP53 Regulates Transcription of DNA Repair Genes / promoter-specific chromatin binding / transcription initiation at RNA polymerase II promoter / RNA Polymerase I Promoter Escape / Transcriptional regulation by small RNAs / P-body / DNA-templated transcription termination / protein-DNA complex / NoRC negatively regulates rRNA expression / B-WICH complex positively regulates rRNA expression / Transcription-Coupled Nucleotide Excision Repair (TC-NER) / Formation of TC-NER Pre-Incision Complex / kinase binding / ribonucleoside binding / fibrillar center / DNA-directed RNA polymerase activity / Activation of anterior HOX genes in hindbrain development during early embryogenesis / DNA-directed RNA polymerase / Dual incision in TC-NER / Gap-filling DNA repair synthesis and ligation in TC-NER / single-stranded DNA binding / chromosome / Hydrolases; Acting on ester bonds; Exoribonucleases producing 5'-phosphomonoesters / Estrogen-dependent gene expression / transcription by RNA polymerase II / nucleic acid binding / single-stranded RNA binding / protein dimerization activity / protein stabilization / hydrolase activity / nuclear speck / RNA-directed RNA polymerase / RNA-directed RNA polymerase activity / nucleotide binding / ubiquitin protein ligase binding / chromatin binding / regulation of DNA-templated transcription / nucleolus / magnesium ion binding
Similarity search - Function
DNA-directed RNA polymerase II subunit Rpb4-like / RNA polymerase Rpb4/RPC9, core / DNA-directed RNA-polymerase II subunit / RNA polymerase Rpb1 C-terminal repeat / RNA polymerase II, heptapeptide repeat, eukaryotic / Eukaryotic RNA polymerase II heptapeptide repeat. / RNA polymerase Rpb1, domain 6 / RNA polymerase Rpb1, domain 6 / RNA polymerase Rpb1, domain 7 / RNA polymerase Rpb1, domain 7 superfamily ...DNA-directed RNA polymerase II subunit Rpb4-like / RNA polymerase Rpb4/RPC9, core / DNA-directed RNA-polymerase II subunit / RNA polymerase Rpb1 C-terminal repeat / RNA polymerase II, heptapeptide repeat, eukaryotic / Eukaryotic RNA polymerase II heptapeptide repeat. / RNA polymerase Rpb1, domain 6 / RNA polymerase Rpb1, domain 6 / RNA polymerase Rpb1, domain 7 / RNA polymerase Rpb1, domain 7 superfamily / RNA polymerase Rpb1, domain 7 / Pol II subunit B9, C-terminal zinc ribbon / RNA polymerase RBP11 / Rpb4/RPC9 superfamily / RNA polymerase subunit Rpb4/RPC9 / RNA polymerase Rpb4 / Zinc finger TFIIS-type signature. / HRDC-like superfamily / RNA polymerase Rpb7-like , N-terminal / RNA polymerase Rpb7-like, N-terminal domain superfamily / RNA polymerase subunit Rpb7-like / SHS2 domain found in N terminus of Rpb7p/Rpc25p/MJ0397 / RNA polymerase Rpb2, domain 5 / RNA polymerase Rpb2, domain 5 / RNA polymerase Rpb2, domain 4 / RNA polymerase Rpb2, domain 4 / DNA-directed RNA polymerase, M/15kDa subunit / RNA polymerases M/15 Kd subunit / RNA polymerase subunit 9 / DNA-directed RNA polymerase M, 15kDa subunit, conserved site / RNA polymerases M / 15 Kd subunits signature. / DNA-directed RNA polymerase subunit/transcription factor S / : / RNA polymerase, Rpb8 / DNA-directed RNA polymerases I, II, and III subunit RPABC4 / RNA polymerase Rpb8 / RNA polymerase subunit 8 / RNA polymerase, Rpb5, N-terminal / RNA polymerase Rpb5, N-terminal domain superfamily / RNA polymerase Rpb5, N-terminal domain / DNA-directed RNA polymerase, subunit RPB6 / DNA-directed RNA polymerase subunit RPABC5/Rpb10 / RNA polymerases, subunit N, zinc binding site / RNA polymerase subunit RPB10 / RNA polymerases N / 8 kDa subunit / RNA polymerases N / 8 Kd subunits signature. / DNA directed RNA polymerase, 7 kDa subunit / RNA polymerase archaeal subunit P/eukaryotic subunit RPABC4 / RNA polymerase, subunit H/Rpb5, conserved site / RNA polymerases H / 23 Kd subunits signature. / RNA polymerase subunit CX / DNA-directed RNA polymerase, 30-40kDa subunit, conserved site / DNA-directed RNA polymerase subunit Rpo3/Rpb3/RPAC1 / RNA polymerases D / 30 to 40 Kd subunits signature. / DNA-directed RNA polymerase Rpb11, 13-16kDa subunit, conserved site / DNA-directed RNA polymerase subunit Rpo11 / RNA polymerases L / 13 to 16 Kd subunits signature. / DNA-directed RNA polymerase subunit Rpo5/Rpb5 / Zinc finger, TFIIS-type / Transcription factor S-II (TFIIS) / Zinc finger TFIIS-type profile. / C2C2 Zinc finger / RNA polymerase subunit RPABC4/transcription elongation factor Spt4 / DNA-directed RNA polymerase, RBP11-like dimerisation domain / RNA polymerase Rpb3/Rpb11 dimerisation domain / RNA polymerase, subunit H/Rpb5 C-terminal / RPB5-like RNA polymerase subunit superfamily / RNA polymerase Rpb5, C-terminal domain / Archaeal Rpo6/eukaryotic RPB6 RNA polymerase subunit / DNA-directed RNA polymerase, 14-18kDa subunit, conserved site / RNA polymerases K / 14 to 18 Kd subunits signature. / Ribosomal protein S1-like RNA-binding domain / S1 RNA binding domain / S1 domain / RNA polymerase Rpb6 / RNA polymerase, subunit omega/Rpo6/RPB6 / RNA polymerase Rpb6 / RNA polymerase Rpb1, domain 3 superfamily / RPB6/omega subunit-like superfamily / RNA polymerase Rpb2, domain 2 superfamily / DNA-directed RNA polymerase, insert domain / DNA-directed RNA polymerase, RpoA/D/Rpb3-type / RNA polymerase Rpb3/RpoA insert domain / RNA polymerase Rpb3/Rpb11 dimerisation domain / RNA polymerases D / RNA polymerase Rpb1, clamp domain superfamily / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1, domain 3 / DNA-directed RNA polymerase, subunit beta-prime / RNA polymerase Rpb1, domain 1 / RNA polymerase Rpb1, domain 1 / RNA polymerase, beta subunit, protrusion / RNA polymerase beta subunit / RNA polymerase, alpha subunit / RNA polymerase Rpb1, domain 5 / RNA polymerase Rpb1, domain 4 / RNA polymerase Rpb1, domain 2 / RNA polymerase Rpb1, domain 5 / RNA polymerase Rpb1, domain 4 / RNA polymerase, N-terminal
Similarity search - Domain/homology
DNA / DNA (> 10) / RNA / RNA (> 10) / DNA-directed RNA polymerase II subunit RPB4 / DNA-directed RNA polymerase II subunit RPB3 / DNA-directed RNA polymerases I, II, and III subunit RPABC1 / DNA-directed RNA polymerase II subunit RPB1 / DNA-directed RNA polymerase II subunit RPB2 / DNA-directed RNA polymerase II subunit RPB9 ...DNA / DNA (> 10) / RNA / RNA (> 10) / DNA-directed RNA polymerase II subunit RPB4 / DNA-directed RNA polymerase II subunit RPB3 / DNA-directed RNA polymerases I, II, and III subunit RPABC1 / DNA-directed RNA polymerase II subunit RPB1 / DNA-directed RNA polymerase II subunit RPB2 / DNA-directed RNA polymerase II subunit RPB9 / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / DNA-directed RNA polymerase II subunit RPB11-a / DNA-directed RNA polymerases I, II, and III subunit RPABC4 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerase II subunit RPB7 / DNA-directed RNA polymerases I, II, and III subunit RPABC5
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.6 Å
AuthorsFlorez Ariza, A. / Lue, N. / Nogales, E.
Funding support United States, 2items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
National Institutes of Health/National Institute of Biomedical Imaging and Bioengineering (NIH/NIBIB)R35 GM127018 United States
CitationJournal: bioRxiv / Year: 2025
Title: Structural insights into transcriptional regulation by the helicase RECQL5.
Authors: Alfredo Jose Florez Ariza / Nicholas Z Lue / Patricia Grob / Benjamin Kaeser / Jie Fang / Susanne A Kassube / Eva Nogales /
Abstract: Transcription and its regulation pose a major challenge for genome stability. The helicase RECQL5 has been proposed as an important factor to help safeguard the genome, and is the only member of the ...Transcription and its regulation pose a major challenge for genome stability. The helicase RECQL5 has been proposed as an important factor to help safeguard the genome, and is the only member of the human RecQ helicase family that directly binds to RNA Polymerase II (Pol II) and affects its progression. RECQL5 mitigates transcription stress and genome instability in cells, yet the molecular mechanism underlying this phenomenon is unclear. Here, we employ cryo-electron microscopy (cryo-EM) to determine the structures of stalled Pol II elongation complexes (ECs) bound to RECQL5. Our structures reveal the molecular interactions stabilizing RECQL5 binding to the Pol II EC and highlight its role as a transcriptional roadblock. Additionally, we find that RECQL5 can modulate the Pol II translocation state. In its nucleotide-free state, RECQL5 mechanically twists the downstream DNA in the EC, and upon nucleotide binding, it undergoes a conformational change that allosterically induces Pol II towards a post-translocation state. We propose this mechanism may help restart Pol II elongation and therefore contribute to reduction of transcription stress.
History
DepositionNov 25, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 5, 2025Provider: repository / Type: Initial release
Revision 1.0Mar 5, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Mar 5, 2025Data content type: Additional map / Part number: 1 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Mar 5, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Mar 5, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Mar 5, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Mar 5, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Mar 5, 2025Data content type: Mask / Part number: 1 / Data content type: Mask / Provider: repository / Type: Initial release
Revision 1.0Mar 5, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
D: DNA-directed RNA polymerase II subunit RPB4
E: DNA-directed RNA polymerases I, II, and III subunit RPABC1
F: DNA-directed RNA polymerases I, II, and III subunit RPABC2
G: DNA-directed RNA polymerase II subunit RPB7
H: DNA-directed RNA polymerases I, II, and III subunit RPABC3
I: DNA-directed RNA polymerase II subunit RPB9
J: DNA-directed RNA polymerases I, II, and III subunit RPABC5
K: DNA-directed RNA polymerase II subunit RPB11-a
L: DNA-directed RNA polymerases I, II, and III subunit RPABC4
N: Non-template DNA, nucleic acid scaffold
P: RNA, nucleic acid scaffold
T: Template DNA, nucleic acid scaffold
A: DNA-directed RNA polymerase II subunit RPB1
B: DNA-directed RNA polymerase II subunit RPB2
C: DNA-directed RNA polymerase II subunit RPB3
hetero molecules


Theoretical massNumber of molelcules
Total (without water)546,22124
Polymers545,67415
Non-polymers5489
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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DNA-directed RNA polymerase II subunit ... , 7 types, 7 molecules DGIKABC

#1: Protein DNA-directed RNA polymerase II subunit RPB4 / RNA polymerase II subunit B4 / DNA-directed RNA polymerase II subunit D / RNA polymerase II 16 kDa ...RNA polymerase II subunit B4 / DNA-directed RNA polymerase II subunit D / RNA polymerase II 16 kDa subunit / RPB16


Mass: 16331.255 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O15514
#4: Protein DNA-directed RNA polymerase II subunit RPB7 / RNA polymerase II subunit B7 / DNA-directed RNA polymerase II subunit G / RNA polymerase II 19 kDa ...RNA polymerase II subunit B7 / DNA-directed RNA polymerase II subunit G / RNA polymerase II 19 kDa subunit / RPB19


Mass: 19314.283 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62487
#6: Protein DNA-directed RNA polymerase II subunit RPB9 / RNA polymerase II subunit B9 / DNA-directed RNA polymerase II subunit I / RNA polymerase II 14.5 ...RNA polymerase II subunit B9 / DNA-directed RNA polymerase II subunit I / RNA polymerase II 14.5 kDa subunit / RPB14.5


Mass: 14541.221 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P36954
#8: Protein DNA-directed RNA polymerase II subunit RPB11-a / RPB11a / DNA-directed RNA polymerase II subunit J-1 / RNA polymerase II 13.3 kDa subunit


Mass: 13310.284 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P52435
#13: Protein DNA-directed RNA polymerase II subunit RPB1 / RNA polymerase II subunit B1 / DNA-directed RNA polymerase II subunit A / DNA-directed RNA ...RNA polymerase II subunit B1 / DNA-directed RNA polymerase II subunit A / DNA-directed RNA polymerase III largest subunit / RNA-directed RNA polymerase II subunit RPB1


Mass: 217420.047 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P24928, DNA-directed RNA polymerase
#14: Protein DNA-directed RNA polymerase II subunit RPB2 / DNA-directed RNA polymerase II 140 kDa polypeptide / DNA-directed RNA polymerase II subunit B / RNA ...DNA-directed RNA polymerase II 140 kDa polypeptide / DNA-directed RNA polymerase II subunit B / RNA polymerase II subunit 2 / RNA polymerase II subunit B2


Mass: 134071.453 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P30876, DNA-directed RNA polymerase
#15: Protein DNA-directed RNA polymerase II subunit RPB3 / RNA polymerase II subunit B3 / DNA-directed RNA polymerase II 33 kDa polypeptide / RPB33 / DNA- ...RNA polymerase II subunit B3 / DNA-directed RNA polymerase II 33 kDa polypeptide / RPB33 / DNA-directed RNA polymerase II subunit C / RPB31


Mass: 31478.148 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P19387

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DNA-directed RNA polymerases I, II, and III subunit ... , 5 types, 5 molecules EFHJL

#2: Protein DNA-directed RNA polymerases I, II, and III subunit RPABC1 / RNA polymerases I / II / and III subunit ABC1 / DNA-directed RNA polymerase II 23 kDa polypeptide / ...RNA polymerases I / II / and III subunit ABC1 / DNA-directed RNA polymerase II 23 kDa polypeptide / DNA-directed RNA polymerase II subunit E / RPB5 homolog / XAP4


Mass: 24644.318 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P19388
#3: Protein DNA-directed RNA polymerases I, II, and III subunit RPABC2 / RNA polymerases I / II / and III subunit ABC2 / DNA-directed RNA polymerase II subunit F / DNA- ...RNA polymerases I / II / and III subunit ABC2 / DNA-directed RNA polymerase II subunit F / DNA-directed RNA polymerases I / and III 14.4 kDa polypeptide / RPABC14.4 / RPB14.4 / RPB6 homolog / RPC15


Mass: 14491.026 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P61218
#5: Protein DNA-directed RNA polymerases I, II, and III subunit RPABC3 / RNA polymerases I / II / and III subunit ABC3 / DNA-directed RNA polymerase II subunit H / DNA- ...RNA polymerases I / II / and III subunit ABC3 / DNA-directed RNA polymerase II subunit H / DNA-directed RNA polymerases I / and III 17.1 kDa polypeptide / RPB17 / RPB8 homolog / hRPB8


Mass: 17162.273 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P52434
#7: Protein DNA-directed RNA polymerases I, II, and III subunit RPABC5 / RNA polymerases I / II / and III subunit ABC5 / DNA-directed RNA polymerase III subunit L / RNA ...RNA polymerases I / II / and III subunit ABC5 / DNA-directed RNA polymerase III subunit L / RNA polymerase II 7.6 kDa subunit / RPB7.6 / RPB10 homolog


Mass: 7655.123 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62875
#9: Protein DNA-directed RNA polymerases I, II, and III subunit RPABC4 / RNA polymerases I / II / and III subunit ABC4 / ABC10-alpha / DNA-directed RNA polymerase II ...RNA polymerases I / II / and III subunit ABC4 / ABC10-alpha / DNA-directed RNA polymerase II subunit K / RNA polymerase II 7.0 kDa subunit / RPB7.0 / RPB10alpha


Mass: 7018.244 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P53803

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DNA chain , 2 types, 2 molecules NT

#10: DNA chain Non-template DNA, nucleic acid scaffold


Mass: 13305.593 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human)
#12: DNA chain Template DNA, nucleic acid scaffold


Mass: 8515.503 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human)

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RNA chain , 1 types, 1 molecules P

#11: RNA chain RNA, nucleic acid scaffold


Mass: 6414.902 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human)

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Non-polymers , 2 types, 9 molecules

#16: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
#17: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY
Has protein modificationN

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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: Free Stalled Human RNA Polymerase II Elongation Complex in an Intermediate Translocation State
Type: COMPLEX / Entity ID: #1-#15 / Source: MULTIPLE SOURCES
Molecular weightValue: 0.43 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1800 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.20.1_4487 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 174428 / Symmetry type: POINT
RefinementHighest resolution: 2.6 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)

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