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Entry
Database: PDB / ID: 9ujs
TitleRNA polymerase II elongation complex stalled at SHL(-4) of the H3-H4 octasome
Components
  • (DNA (198-MER)) x 2
  • (DNA-directed RNA polymerase ...) x 3
  • (RNA polymerase II ...) x 4
  • (RNA polymerase subunit ...) x 4
  • DNA-directed RNA polymerases I, II, and III subunit RPABC3
  • Histone H3.1
  • Histone H4
  • RNA (5'-R(P*GP*UP*GP*GP*CP*CP*GP*UP*UP*UP*U)-3')
KeywordsTRANSCRIPTION/RNA/DNA / RNAPII / subnucleosome / TRANSCRIPTION / TRANSCRIPTION-RNA-DNA complex
Function / homology
Function and homology information


regulation of septum digestion after cytokinesis / co-transcriptional lncRNA 3' end processing, cleavage and polyadenylation pathway / siRNA-mediated pericentric heterochromatin formation / RPB4-RPB7 complex / intracellular phosphate ion homeostasis / chromatin-protein adaptor activity / nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / termination of RNA polymerase II transcription / termination of RNA polymerase III transcription / positive regulation of nuclear-transcribed mRNA poly(A) tail shortening ...regulation of septum digestion after cytokinesis / co-transcriptional lncRNA 3' end processing, cleavage and polyadenylation pathway / siRNA-mediated pericentric heterochromatin formation / RPB4-RPB7 complex / intracellular phosphate ion homeostasis / chromatin-protein adaptor activity / nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / termination of RNA polymerase II transcription / termination of RNA polymerase III transcription / positive regulation of nuclear-transcribed mRNA poly(A) tail shortening / transcription initiation at RNA polymerase III promoter / termination of RNA polymerase I transcription / transcription initiation at RNA polymerase I promoter / maintenance of transcriptional fidelity during transcription elongation by RNA polymerase II / positive regulation of translational initiation / nuclear-transcribed mRNA catabolic process / pericentric heterochromatin / RNA polymerase I complex / RNA polymerase III complex / transcription elongation by RNA polymerase I / RNA polymerase II, core complex / tRNA transcription by RNA polymerase III / negative regulation of megakaryocyte differentiation / translesion synthesis / transcription by RNA polymerase I / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / transcription-coupled nucleotide-excision repair / translation initiation factor binding / Packaging Of Telomere Ends / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Deposition of new CENPA-containing nucleosomes at the centromere / epigenetic regulation of gene expression / telomere organization / Interleukin-7 signaling / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / RNA Polymerase I Promoter Opening / Inhibition of DNA recombination at telomere / Assembly of the ORC complex at the origin of replication / Meiotic synapsis / SUMOylation of chromatin organization proteins / Regulation of endogenous retroelements by the Human Silencing Hub (HUSH) complex / DNA methylation / Condensation of Prophase Chromosomes / Chromatin modifications during the maternal to zygotic transition (MZT) / SIRT1 negatively regulates rRNA expression / HCMV Late Events / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / PRC2 methylates histones and DNA / Regulation of endogenous retroelements by KRAB-ZFP proteins / Defective pyroptosis / HDACs deacetylate histones / transcription initiation at RNA polymerase II promoter / P-body / Regulation of endogenous retroelements by Piwi-interacting RNAs (piRNAs) / Nonhomologous End-Joining (NHEJ) / RNA Polymerase I Promoter Escape / transcription elongation by RNA polymerase II / Transcriptional regulation by small RNAs / Formation of the beta-catenin:TCF transactivating complex / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / HDMs demethylate histones / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / G2/M DNA damage checkpoint / Negative Regulation of CDH1 Gene Transcription / NoRC negatively regulates rRNA expression / PKMTs methylate histone lysines / B-WICH complex positively regulates rRNA expression / DNA Damage/Telomere Stress Induced Senescence / Pre-NOTCH Transcription and Translation / ribonucleoside binding / Meiotic recombination / Activation of anterior HOX genes in hindbrain development during early embryogenesis / Transcriptional regulation of granulopoiesis / DNA-directed RNA polymerase / RMTs methylate histone arginines / HCMV Early Events / structural constituent of chromatin / DNA-directed RNA polymerase activity / nucleosome / nucleosome assembly / single-stranded DNA binding / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / HATs acetylate histones / Factors involved in megakaryocyte development and platelet production / RUNX1 regulates transcription of genes involved in differentiation of HSCs / MLL4 and MLL3 complexes regulate expression of PPARG target genes in adipogenesis and hepatic steatosis / chromatin organization / Processing of DNA double-strand break ends / Senescence-Associated Secretory Phenotype (SASP) / Oxidative Stress Induced Senescence / transcription by RNA polymerase II / Estrogen-dependent gene expression / nucleic acid binding / chromosome, telomeric region / protein dimerization activity
Similarity search - Function
DNA-directed RNA polymerase II subunit Rpb4-like / 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 Rpb4/RPC9, core / DNA-directed RNA-polymerase II subunit / RNA polymerase Rpb1, domain 7 / RNA polymerase Rpb1, domain 7 superfamily ...DNA-directed RNA polymerase II subunit Rpb4-like / 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 Rpb4/RPC9, core / DNA-directed RNA-polymerase II subunit / RNA polymerase Rpb1, domain 7 / RNA polymerase Rpb1, domain 7 superfamily / RNA polymerase Rpb1, domain 7 / Pol II subunit B9, C-terminal zinc ribbon / Rpb4/RPC9 superfamily / RNA polymerase RBP11 / RNA polymerase subunit Rpb4/RPC9 / RNA polymerase Rpb4 / S1 domain profile. / 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 / HRDC-like superfamily / 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. / RNA polymerase, subunit H/Rpb5, conserved site / RNA polymerases H / 23 Kd subunits signature. / DNA directed RNA polymerase, 7 kDa subunit / RNA polymerase archaeal subunit P/eukaryotic subunit RPABC4 / 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. / RNA polymerase subunit RPABC4/transcription elongation factor Spt4 / Zinc finger, TFIIS-type / Transcription factor S-II (TFIIS) / Zinc finger TFIIS-type profile. / C2C2 Zinc finger / DNA-directed RNA polymerase, RBP11-like dimerisation domain / RNA polymerase Rpb3/Rpb11 dimerisation domain / RNA polymerase, subunit H/Rpb5 C-terminal / DNA-directed RNA polymerase subunit Rpo5/Rpb5 / 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. / S1 RNA binding domain / S1 domain / 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 / DNA-directed RNA polymerase, subunit beta-prime / RNA polymerase Rpb6 / RNA polymerase Rpb2, domain 2 superfamily / RNA polymerase, subunit omega/Rpo6/RPB6 / RNA polymerase Rpb6 / RNA polymerase Rpb1, domain 3 superfamily / RPB6/omega subunit-like superfamily / RNA polymerase Rpb1, clamp domain superfamily / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1, domain 3 / RNA polymerase, beta subunit, protrusion / RNA polymerase beta subunit / RNA polymerase Rpb1, domain 1 / RNA polymerase Rpb1, domain 1 / 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
Similarity search - Domain/homology
DNA / DNA (> 10) / DNA (> 100) / RNA / RNA (> 10) / DNA-directed RNA polymerase subunit beta / DNA-directed RNA polymerases I, II, and III subunit RPABC5 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / RNA polymerase II subunit B32 ...DNA / DNA (> 10) / DNA (> 100) / RNA / RNA (> 10) / DNA-directed RNA polymerase subunit beta / DNA-directed RNA polymerases I, II, and III subunit RPABC5 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / RNA polymerase II subunit B32 / DNA-directed RNA polymerases I, II, and III subunit RPABC1 / RNA polymerase II subunit B12.5 / DNA-directed RNA polymerase subunit / DNA-directed RNA polymerase II subunit RPB3 / DNA-directed RNA polymerase subunit / RNA polymerase subunit ABC10-alpha / DNA-directed RNA polymerase subunit / Histone H4 / Histone H3.1
Similarity search - Component
Biological speciesHomo sapiens (human)
Komagataella phaffii GS115 (fungus)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.62 Å
AuthorsHo, C.-H. / Nozawa, K. / Nishimura, M. / Oi, M. / Kujirai, T. / Ogasawara, M. / Ehara, H. / Sekine, S. / Takizawa, Y. / Kurumizaka, H.
Funding support Japan, 9items
OrganizationGrant numberCountry
Japan Society for the Promotion of Science (JSPS)JP20H03201 Japan
Japan Society for the Promotion of Science (JSPS)JP20H05690 Japan
Japan Society for the Promotion of Science (JSPS)JP22K15033 Japan
Japan Society for the Promotion of Science (JSPS)JP23K17392 Japan
Japan Society for the Promotion of Science (JSPS)JP22K06098 Japan
Japan Society for the Promotion of Science (JSPS)JP23H05475 Japan
Japan Society for the Promotion of Science (JSPS)JP24H02328 Japan
Japan Science and TechnologyJPMJER1901 Japan
Japan Agency for Medical Research and Development (AMED)JP24ama121009 Japan
CitationJournal: J Biol Chem / Year: 2026
Title: Structural basis of RNA polymerase II transcription on the histone H3-H4 octasome.
Authors: Cheng-Han Ho / Kayo Nozawa / Masahiro Nishimura / Mayuko Oi / Tomoya Kujirai / Mitsuo Ogasawara / Haruhiko Ehara / Shun-Ichi Sekine / Yoshimasa Takizawa / Hitoshi Kurumizaka /
Abstract: The histone H3-H4 octasome is a nucleosome-like particle in which two DNA gyres are wrapped around each histone (H3-H4) tetramer disk, forming a clamshell-like configuration. In the present study, we ...The histone H3-H4 octasome is a nucleosome-like particle in which two DNA gyres are wrapped around each histone (H3-H4) tetramer disk, forming a clamshell-like configuration. In the present study, we performed in vitro RNA polymerase II (RNAPII) transcription assays with the H3-H4 octasome and found that RNAPII transcribed the H3-H4 octasome more efficiently than the nucleosome. RNAPII paused at only one position, superhelical location (SHL(-4)) in the H3-H4 octasome, in contrast to pausing at the SHL(-5), SHL(-2), and SHL(-1) positions in the nucleosome. Cryo-EM analysis revealed that two (H3-H4) tetramer disks are retained when the RNAPII paused at the SHL(-4) position of the H3-H4 octasome. However, when RNAPII reached the SHL(-0.5) position, five base pairs before the dyad position of the H3-H4 octasome, the proximal (H3-H4) tetramer was disassembled, but the distal (H3-H4) tetramer still remained on the DNA. Therefore, RNAPII efficiently transcribes the H3-H4 octasome by stepwise (H3-H4) tetramer disassembly.
History
DepositionApr 17, 2025Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Apr 15, 2026Provider: repository / Type: Initial release
Revision 1.0Apr 15, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Apr 15, 2026Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Apr 15, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 15, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 15, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Apr 15, 2026Data 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
A: DNA-directed RNA polymerase subunit
B: DNA-directed RNA polymerase subunit beta
C: RNA polymerase II third largest subunit B44, part of central core
D: RNA polymerase II subunit B32
E: RNA polymerase subunit ABC27, common to RNA polymerases I, II, and III
F: RNA polymerase subunit ABC23, common to RNA polymerases I, II, and III
G: RNA polymerase II subunit
H: DNA-directed RNA polymerases I, II, and III subunit RPABC3
I: DNA-directed RNA polymerase subunit
J: RNA polymerase subunit ABC10-beta, common to RNA polymerases I, II, and III
K: RNA polymerase II subunit B12.5
L: RNA polymerase subunit ABC10-alpha
P: RNA (5'-R(P*GP*UP*GP*GP*CP*CP*GP*UP*UP*UP*U)-3')
N: DNA (198-MER)
T: DNA (198-MER)
a: Histone H3.1
b: Histone H4
c: Histone H3.1
d: Histone H4
e: Histone H3.1
f: Histone H4
g: Histone H3.1
h: Histone H4


Theoretical massNumber of molelcules
Total (without water)745,68623
Polymers745,68623
Non-polymers00
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 ... , 3 types, 3 molecules ABI

#1: Protein DNA-directed RNA polymerase subunit


Mass: 194107.422 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: C4R4Y0, DNA-directed RNA polymerase
#2: Protein DNA-directed RNA polymerase subunit beta


Mass: 139746.094 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: C4QZQ7, DNA-directed RNA polymerase
#9: Protein DNA-directed RNA polymerase subunit / DNA-directed RNA polymerase subunit / Rpb9


Mass: 13612.320 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: F2QPE6

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RNA polymerase II ... , 4 types, 4 molecules CDGK

#3: Protein RNA polymerase II third largest subunit B44, part of central core


Mass: 34216.293 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: C4R7L2
#4: Protein RNA polymerase II subunit B32


Mass: 20622.980 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: C4R2U9
#7: Protein RNA polymerase II subunit


Mass: 18802.625 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: C4R9A1
#11: Protein RNA polymerase II subunit B12.5


Mass: 13832.896 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: C4R3Z5

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RNA polymerase subunit ... , 4 types, 4 molecules EFJL

#5: Protein RNA polymerase subunit ABC27, common to RNA polymerases I, II, and III


Mass: 24962.680 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: C4R3P8
#6: Protein RNA polymerase subunit ABC23, common to RNA polymerases I, II, and III


Mass: 17803.588 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: C4R1V1
#10: Protein RNA polymerase subunit ABC10-beta, common to RNA polymerases I, II, and III


Mass: 8554.064 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: C4R009
#12: Protein RNA polymerase subunit ABC10-alpha


Mass: 7862.048 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: F2QMI1

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Protein , 3 types, 9 molecules Hacegbdfh

#8: Protein DNA-directed RNA polymerases I, II, and III subunit RPABC3


Mass: 16249.220 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Komagataella phaffii GS115 (fungus) / References: UniProt: C4R273
#16: Protein
Histone H3.1 / Histone H3/a / Histone H3/b / Histone H3/c / Histone H3/d / Histone H3/f / Histone H3/h / Histone ...Histone H3/a / Histone H3/b / Histone H3/c / Histone H3/d / Histone H3/f / Histone H3/h / Histone H3/i / Histone H3/j / Histone H3/k / Histone H3/l


Mass: 15719.445 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human)
Gene: H3C1, H3FA, HIST1H3A, H3C2, H3FL, HIST1H3B, H3C3, H3FC HIST1H3C, H3C4, H3FB, HIST1H3D, H3C6, H3FD, HIST1H3E, H3C7, H3FI, HIST1H3F, H3C8, H3FH, HIST1H3G, H3C10, H3FK, HIST1H3H, H3C11, H3FF, ...Gene: H3C1, H3FA, HIST1H3A, H3C2, H3FL, HIST1H3B, H3C3, H3FC HIST1H3C, H3C4, H3FB, HIST1H3D, H3C6, H3FD, HIST1H3E, H3C7, H3FI, HIST1H3F, H3C8, H3FH, HIST1H3G, H3C10, H3FK, HIST1H3H, H3C11, H3FF, HIST1H3I, H3C12, H3FJ, HIST1H3J
Production host: Escherichia coli (E. coli) / References: UniProt: P68431
#17: Protein
Histone H4


Mass: 11676.703 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human)
Gene: H4C1, H4/A, H4FA, HIST1H4A, H4C2, H4/I, H4FI, HIST1H4B, H4C3, H4/G, H4FG, HIST1H4C, H4C4, H4/B, H4FB, HIST1H4D, H4C5, H4/J, H4FJ, HIST1H4E, H4C6, H4/C, H4FC, HIST1H4F, H4C8, H4/H, H4FH, ...Gene: H4C1, H4/A, H4FA, HIST1H4A, H4C2, H4/I, H4FI, HIST1H4B, H4C3, H4/G, H4FG, HIST1H4C, H4C4, H4/B, H4FB, HIST1H4D, H4C5, H4/J, H4FJ, HIST1H4E, H4C6, H4/C, H4FC, HIST1H4F, H4C8, H4/H, H4FH, HIST1H4H, H4C9, H4/M, H4FM, HIST1H4I, H4C11, H4/E, H4FE, HIST1H4J, H4C12, H4/D, H4FD, HIST1H4K, H4C13, H4/K, H4FK, HIST1H4L, H4C14, H4/N, H4F2, H4FN, HIST2H4, HIST2H4A, H4C15, H4/O, H4FO, HIST2H4B, H4C16, H4-16, HIST4H4
Production host: Escherichia coli (E. coli) / References: UniProt: P62805

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RNA chain , 1 types, 1 molecules P

#13: RNA chain RNA (5'-R(P*GP*UP*GP*GP*CP*CP*GP*UP*UP*UP*U)-3')


Mass: 3477.058 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)

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DNA chain , 2 types, 2 molecules NT

#14: DNA chain DNA (198-MER)


Mass: 61372.891 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#15: DNA chain DNA (198-MER)


Mass: 60878.992 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)

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Details

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

Component
IDNameTypeEntity IDParent-IDSource
1RNA polymerase II elongation complex stalled at SHL(-4) of the H3-H4 octasomeCOMPLEXall0MULTIPLE SOURCES
2RNA Polymerase II elongation complexCOMPLEX#1-#121NATURAL
3H3-H4 octasomeCOMPLEX#16-#171RECOMBINANT
4DNA,RNACOMPLEX#13-#151SYNTHETIC
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Komagataella phaffii GS115 (fungus)644223
23Homo sapiens (human)9606
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
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: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 3 / Num. of real images: 36878
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 20 eV

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Processing

EM software
IDNameCategoryDetails
8PHENIXmodel refinement
13cryoSPARC3D reconstruction3Dflex
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.62 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 30000 / Details: CryoSPARC 3D flex reconstruction / Symmetry type: POINT
RefinementHighest resolution: 3.62 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00343593
ELECTRON MICROSCOPYf_angle_d0.68460140
ELECTRON MICROSCOPYf_dihedral_angle_d23.1128286
ELECTRON MICROSCOPYf_chiral_restr0.0436759
ELECTRON MICROSCOPYf_plane_restr0.0046706

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