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- EMDB-8131: Human core TFIIH bound to DNA within the PIC -

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Basic information

Entry
Database: EMDB / ID: EMD-8131
TitleHuman core TFIIH bound to DNA within the PIC
Map dataHuman core TFIIH bound to DNA within the PIC
Sample
  • Complex: Human core TFIIH bound to DNA within the PIC
    • Protein or peptide: TFIIH basal transcription factor complex helicase XPB subunit
    • Protein or peptide: TFIIH basal transcription factor complex helicase XPD subunit
    • Protein or peptide: General transcription factor IIH subunit 2
    • Protein or peptide: General transcription factor IIH subunit 5
    • Protein or peptide: General transcription factor IIH subunit 4
    • Protein or peptide: General transcription factor IIH subunit 3
    • DNA: scp-X
    • DNA: scp-Y
Keywordsinitiation / RNA polymerase II / human / TRANSCRIPTION-DNA complex
Function / homology
Function and homology information


MMXD complex / core TFIIH complex portion of holo TFIIH complex / Cytosolic iron-sulfur cluster assembly / nucleotide-excision repair, DNA duplex unwinding / central nervous system myelin formation / positive regulation of mitotic recombination / hair follicle maturation / hair cell differentiation / nucleotide-excision repair factor 3 complex / nucleotide-excision repair, preincision complex assembly ...MMXD complex / core TFIIH complex portion of holo TFIIH complex / Cytosolic iron-sulfur cluster assembly / nucleotide-excision repair, DNA duplex unwinding / central nervous system myelin formation / positive regulation of mitotic recombination / hair follicle maturation / hair cell differentiation / nucleotide-excision repair factor 3 complex / nucleotide-excision repair, preincision complex assembly / CAK-ERCC2 complex / UV protection / embryonic cleavage / DNA 5'-3' helicase / G protein-coupled receptor internalization / transcription factor TFIIH holo complex / transcription factor TFIIH core complex / DNA 3'-5' helicase / RNA Polymerase I Transcription Termination / transcription preinitiation complex / regulation of mitotic cell cycle phase transition / hematopoietic stem cell proliferation / 3'-5' DNA helicase activity / RNA Pol II CTD phosphorylation and interaction with CE during HIV infection / RNA Pol II CTD phosphorylation and interaction with CE / transcription factor TFIID complex / Formation of the Early Elongation Complex / Formation of the HIV-1 Early Elongation Complex / RNA polymerase II general transcription initiation factor activity / spinal cord development / 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 / bone mineralization / erythrocyte maturation / RNA Polymerase I Transcription Initiation / ATPase activator activity / DNA topological change / intrinsic apoptotic signaling pathway by p53 class mediator / hematopoietic stem cell differentiation / Tat-mediated elongation of the HIV-1 transcript / transcription elongation by RNA polymerase I / Formation of HIV-1 elongation complex containing HIV-1 Tat / transcription-coupled nucleotide-excision repair / embryonic organ development / Formation of HIV elongation complex in the absence of HIV Tat / RNA Polymerase II Transcription Elongation / Formation of RNA Pol II elongation complex / response to UV / RNA Polymerase II Pre-transcription Events / DNA helicase activity / extracellular matrix organization / insulin-like growth factor receptor signaling pathway / post-embryonic development / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / isomerase activity / chromosome segregation / determination of adult lifespan / promoter-specific chromatin binding / nucleotide-excision repair / TP53 Regulates Transcription of DNA Repair Genes / transcription initiation at RNA polymerase II promoter / RNA Polymerase I Promoter Escape / transcription elongation by RNA polymerase II / NoRC negatively regulates rRNA expression / multicellular organism growth / cellular response to gamma radiation / Transcription-Coupled Nucleotide Excision Repair (TC-NER) / Formation of TC-NER Pre-Incision Complex / Dual Incision in GG-NER / Formation of Incision Complex in GG-NER / spindle / Dual incision in TC-NER / Gap-filling DNA repair synthesis and ligation in TC-NER / protein localization / protein-macromolecule adaptor activity / 4 iron, 4 sulfur cluster binding / 5'-3' DNA helicase activity / double-stranded DNA binding / in utero embryonic development / response to oxidative stress / transcription by RNA polymerase II / damaged DNA binding / response to hypoxia / nuclear speck / positive regulation of apoptotic process / DNA repair / regulation of DNA-templated transcription / regulation of transcription by RNA polymerase II / nucleolus / apoptotic process / ATP hydrolysis activity / DNA binding / zinc ion binding / nucleoplasm
Similarity search - Function
TFIIH subunit Tfb4/GTF2H3 / Transcription factor Tfb4 / TFIIH C1-like domain / Ssl1-like / TFIIH subunit Ssl1/p44 / Ssl1-like / TFIIH C1-like domain / TFIIH C1-like domain / RAD3/XPD family / Helicase XPB/Ssl2 ...TFIIH subunit Tfb4/GTF2H3 / Transcription factor Tfb4 / TFIIH C1-like domain / Ssl1-like / TFIIH subunit Ssl1/p44 / Ssl1-like / TFIIH C1-like domain / TFIIH C1-like domain / RAD3/XPD family / Helicase XPB/Ssl2 / ERCC3/RAD25/XPB helicase, C-terminal domain / Helicase XPB/Ssl2, N-terminal domain / Helicase conserved C-terminal domain / ERCC3/RAD25/XPB C-terminal helicase / Helical and beta-bridge domain / Helical and beta-bridge domain / Transcription factor TFIIH subunit p52/Tfb2 / Transcription factor Tfb2, C-terminal domain / Transcription factor Tfb2 / Transcription factor Tfb2 (p52) C-terminal domain / TFIIH subunit TTDA/Tfb5 / TFB5-like superfamily / Transcription factor TFIIH complex subunit Tfb5 / Transcription factor TFIIH complex subunit Tfb5 / ATP-dependent helicase Rad3/Chl1-like / : / Helicase-like, DEXD box c2 type / DEAD2 / DEAD_2 / DEXDc2 / Helicase superfamily 1/2, DinG/Rad3-like / HELICc2 / ATP-dependent helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain, DinG/Rad3-type / Helicase C-terminal domain / Superfamilies 1 and 2 helicase ATP-binding type-2 domain profile. / Helicase/UvrB, N-terminal / Type III restriction enzyme, res subunit / DNA/RNA helicase, ATP-dependent, DEAH-box type, conserved site / DEAH-box subfamily ATP-dependent helicases signature. / C1-like domain superfamily / von Willebrand factor (vWF) type A domain / VWFA domain profile. / von Willebrand factor, type A / von Willebrand factor A-like domain superfamily / Zinc finger C2H2-type / helicase superfamily c-terminal domain / Superfamilies 1 and 2 helicase C-terminal domain profile. / Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile. / DEAD-like helicases superfamily / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / Zinc finger, RING/FYVE/PHD-type / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
General transcription and DNA repair factor IIH helicase subunit XPD / General transcription and DNA repair factor IIH helicase/translocase subunit XPB / General transcription factor IIH subunit 2 / General transcription factor IIH subunit 3 / General transcription factor IIH subunit 5 / General transcription factor IIH subunit 4
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 10.0 Å
AuthorsHe Y / Yan C
Funding support United States, 4 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM63072 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM110387 United States
National Science Foundation (NSF, United States)MCB-1149521 United States
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Nature / Year: 2016
Title: Near-atomic resolution visualization of human transcription promoter opening.
Authors: Yuan He / Chunli Yan / Jie Fang / Carla Inouye / Robert Tjian / Ivaylo Ivanov / Eva Nogales /
Abstract: In eukaryotic transcription initiation, a large multi-subunit pre-initiation complex (PIC) that assembles at the core promoter is required for the opening of the duplex DNA and identification of the ...In eukaryotic transcription initiation, a large multi-subunit pre-initiation complex (PIC) that assembles at the core promoter is required for the opening of the duplex DNA and identification of the start site for transcription by RNA polymerase II. Here we use cryo-electron microscropy (cryo-EM) to determine near-atomic resolution structures of the human PIC in a closed state (engaged with duplex DNA), an open state (engaged with a transcription bubble), and an initially transcribing complex (containing six base pairs of DNA-RNA hybrid). Our studies provide structures for previously uncharacterized components of the PIC, such as TFIIE and TFIIH, and segments of TFIIA, TFIIB and TFIIF. Comparison of the different structures reveals the sequential conformational changes that accompany the transition from each state to the next throughout the transcription initiation process. This analysis illustrates the key role of TFIIB in transcription bubble stabilization and provides strong structural support for a translocase activity of XPB.
History
DepositionMay 5, 2016-
Header (metadata) releaseMay 18, 2016-
Map releaseMay 18, 2016-
UpdateMar 6, 2024-
Current statusMar 6, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.05
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  • Surface level: 0.05
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  • Surface view with fitted model
  • Atomic models: PDB-5ivw
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_8131.png

Downloads & links

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Map

FileDownload / File: emd_8131.map.gz / Format: CCP4 / Size: 27 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationHuman core TFIIH bound to DNA within the PIC
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
2.62 Å/pix.
x 192 pix.
= 503.04 Å		2.62 Å/pix.
x 192 pix.
= 503.04 Å		2.62 Å/pix.
x 192 pix.
= 503.04 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 2.62 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.05 / Movie #1: 0.05
Minimum - Maximum-0.085879035 - 0.18077035
Average (Standard dev.)0.00024816254 (±0.004588992)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions192192192
Spacing192192192
CellA=B=C: 503.03998 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z2.622.622.62
M x/y/z192192192
origin x/y/z0.0000.0000.000
length x/y/z503.040503.040503.040
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ329329329
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS192192192
D min/max/mean-0.0860.1810.000

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Supplemental data

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Sample components

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Entire : Human core TFIIH bound to DNA within the PIC

EntireName: Human core TFIIH bound to DNA within the PIC
Components
  • Complex: Human core TFIIH bound to DNA within the PIC
    • Protein or peptide: TFIIH basal transcription factor complex helicase XPB subunit
    • Protein or peptide: TFIIH basal transcription factor complex helicase XPD subunit
    • Protein or peptide: General transcription factor IIH subunit 2
    • Protein or peptide: General transcription factor IIH subunit 5
    • Protein or peptide: General transcription factor IIH subunit 4
    • Protein or peptide: General transcription factor IIH subunit 3
    • DNA: scp-X
    • DNA: scp-Y

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Supramolecule #1: Human core TFIIH bound to DNA within the PIC

SupramoleculeName: Human core TFIIH bound to DNA within the PIC / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 490 KDa

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Macromolecule #1: TFIIH basal transcription factor complex helicase XPB subunit

MacromoleculeName: TFIIH basal transcription factor complex helicase XPB subunit
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA helicase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 89.404734 KDa
SequenceString: MGKRDRADRD KKKSRKRHYE DEEDDEEDAP GNDPQEAVPS AAGKQVDESG TKVDEYGAKD YRLQMPLKDD HTSRPLWVAP DGHIFLEAF SPVYKYAQDF LVAIAEPVCR PTHVHEYKLT AYSLYAAVSV GLQTSDITEY LRKLSKTGVP DGIMQFIKLC T VSYGKVKL ...String:
MGKRDRADRD KKKSRKRHYE DEEDDEEDAP GNDPQEAVPS AAGKQVDESG TKVDEYGAKD YRLQMPLKDD HTSRPLWVAP DGHIFLEAF SPVYKYAQDF LVAIAEPVCR PTHVHEYKLT AYSLYAAVSV GLQTSDITEY LRKLSKTGVP DGIMQFIKLC T VSYGKVKL VLKHNRYFVE SCHPDVIQHL LQDPVIRECR LRNSEGEATE LITETFTSKS AISKTAESSG GPSTSRVTDP QG KSDIPMD LFDFYEQMDK DEEEEEETQT VSFEVKQEMI EELQKRCIHL EYPLLAEYDF RNDSVNPDIN IDLKPTAVLR PYQ EKSLRK MFGNGRARSG VIVLPCGAGK SLVGVTAACT VRKRCLVLGN SAVSVEQWKA QFKMWSTIDD SQICRFTSDA KDKP IGCSV AISTYSMLGH TTKRSWEAER VMEWLKTQEW GLMILDEVHT IPAKMFRRVL TIVQAHCKLG LTATLVREDD KIVDL NFLI GPKLYEANWM ELQNNGYIAK VQCAEVWCPM SPEFYREYVA IKTKKRILLY TMNPNKFRAC QFLIKFHERR NDKIIV FAD NVFALKEYAI RLNKPYIYGP TSQGERMQIL QNFKHNPKIN TIFISKVGDT SFDLPEANVL IQISSHGGSR RQEAQRL GR VLRAKKGMVA EEYNAFFYSL VSQDTQEMAY STKRQRFLVD QGYSFKVITK LAGMEEEDLA FSTKEEQQQL LQKVLAAT D LDAEEEVVAG EFGSRSSQAS RRFGTMSSMS GADDTVYMEY HSSRSKAPSK HVHPLFKRFR K

UniProtKB: General transcription and DNA repair factor IIH helicase/translocase subunit XPB

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Macromolecule #2: TFIIH basal transcription factor complex helicase XPD subunit

MacromoleculeName: TFIIH basal transcription factor complex helicase XPD subunit
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA helicase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 87.021078 KDa
SequenceString: MKLNVDGLLV YFPYDYIYPE QFSYMRELKR TLDAKGHGVL EMPSGTGKTV SLLALIMAYQ RAYPLEVTKL IYCSRTVPEI EKVIEELRK LLNFYEKQEG EKLPFLGLAL SSRKNLCIHP EVTPLRFGKD VDGKCHSLTA SYVRAQYQHD TSLPHCRFYE E FDAHGREV ...String:
MKLNVDGLLV YFPYDYIYPE QFSYMRELKR TLDAKGHGVL EMPSGTGKTV SLLALIMAYQ RAYPLEVTKL IYCSRTVPEI EKVIEELRK LLNFYEKQEG EKLPFLGLAL SSRKNLCIHP EVTPLRFGKD VDGKCHSLTA SYVRAQYQHD TSLPHCRFYE E FDAHGREV PLPAGIYNLD DLKALGRRQG WCPYFLARYS ILHANVVVYS YHYLLDPKIA DLVSKELARK AVVVFDEAHN ID NVCIDSM SVNLTRRTLD RCQGNLETLQ KTVLRIKETD EQRLRDEYRR LVEGLREASA ARETDAHLAN PVLPDEVLQE AVP GSIRTA EHFLGFLRRL LEYVKWRLRV QHVVQESPPA FLSGLAQRVC IQRKPLRFCA ERLRSLLHTL EITDLADFSP LTLL ANFAT LVSTYAKGFT IIIEPFDDRT PTIANPILHF SCMDASLAIK PVFERFQSVI ITSGTLSPLD IYPKILDFHP VTMAT FTMT LARVCLCPMI IGRGNDQVAI SSKFETREDI AVIRNYGNLL LEMSAVVPDG IVAFFTSYQY MESTVASWYE QGILEN IQR NKLLFIETQD GAETSVALEK YQEACENGRG AILLSVARGK VSEGIDFVHH YGRAVIMFGV PYVYTQSRIL KARLEYL RD QFQIRENDFL TFDAMRHAAQ CVGRAIRGKT DYGLMVFADK RFARGDKRGK LPRWIQEHLT DANLNLTVDE GVQVAKYF L RQMAQPFHRE DQLGLSLLSL EQLESEETLK RIEQIAQQL

UniProtKB: General transcription and DNA repair factor IIH helicase subunit XPD

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Macromolecule #3: General transcription factor IIH subunit 2

MacromoleculeName: General transcription factor IIH subunit 2 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 44.481996 KDa
SequenceString: MDEEPERTKR WEGGYERTWE ILKEDESGSL KATIEDILFK AKRKRVFEHH GQVRLGMMRH LYVVVDGSRT MEDQDLKPNR LTCTLKLLE YFVEEYFDQN PISQIGIIVT KSKRAEKLTE LSGNPRKHIT SLKKAVDMTC HGEPSLYNSL SIAMQTLKHM P GHTSREVL ...String:
MDEEPERTKR WEGGYERTWE ILKEDESGSL KATIEDILFK AKRKRVFEHH GQVRLGMMRH LYVVVDGSRT MEDQDLKPNR LTCTLKLLE YFVEEYFDQN PISQIGIIVT KSKRAEKLTE LSGNPRKHIT SLKKAVDMTC HGEPSLYNSL SIAMQTLKHM P GHTSREVL IIFSSLTTCD PSNIYDLIKT LKAAKIRVSV IGLSAEVRVC TVLARETGGT YHVILDESHY KELLTHHVSP PP ASSSSEC SLIRMGFPQH TIASLSDQDA KPSFSMAHLD GNTEPGLTLG GYFCPQCRAK YCELPVECKI CGLTLVSAPH LAR SYHHLF PLDAFQEIPL EEYNGERFCY GCQGELKDQH VYVCAVCQNV FCVDCDVFVH DSLHCCPGCI HKIPAPSGV

UniProtKB: General transcription factor IIH subunit 2

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Macromolecule #4: General transcription factor IIH subunit 5

MacromoleculeName: General transcription factor IIH subunit 5 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 8.060362 KDa
SequenceString:
MVNVLKGVLI ECDPAMKQFL LYLDESNALG KKFIIQDIDD THVFVIAELV NVLQERVGEL MDQNAFSLTQ K

UniProtKB: General transcription factor IIH subunit 5

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Macromolecule #5: General transcription factor IIH subunit 4

MacromoleculeName: General transcription factor IIH subunit 4 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 52.245156 KDa
SequenceString: MESTPSRGLN RVHLQCRNLQ EFLGGLSPGV LDRLYGHPAT CLAVFRELPS LAKNWVMRML FLEQPLPQAA VALWVKKEFS KAQEESTGL LSGLRIWHTQ LLPGGLQGLI LNPIFRQNLR IALLGGGKAW SDDTSQLGPD KHARDVPSLD KYAEERWEVV L HFMVGSPS ...String:
MESTPSRGLN RVHLQCRNLQ EFLGGLSPGV LDRLYGHPAT CLAVFRELPS LAKNWVMRML FLEQPLPQAA VALWVKKEFS KAQEESTGL LSGLRIWHTQ LLPGGLQGLI LNPIFRQNLR IALLGGGKAW SDDTSQLGPD KHARDVPSLD KYAEERWEVV L HFMVGSPS AAVSQDLAQL LSQAGLMKST EPGEPPCITS AGFQFLLLDT PAQLWYFMLQ YLQTAQSRGM DLVEILSFLF QL SFSTLGK DYSVEGMSDS LLNFLQHLRE FGLVFQRKRK SRRYYPTRLA INLSSGVSGA GGTVHQPGFI VVETNYRLYA YTE SELQIA LIALFSEMLY RFPNMVVAQV TRESVQQAIA SGITAQQIIH FLRTRAHPVM LKQTPVLPPT ITDQIRLWEL ERDR LRFTE GVLYNQFLSQ VDFELLLAHA RELGVLVFEN SAKRLMVVTP AGHSDVKRFW KRQKHSS

UniProtKB: General transcription factor IIH subunit 4

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Macromolecule #6: General transcription factor IIH subunit 3

MacromoleculeName: General transcription factor IIH subunit 3 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 34.416008 KDa
SequenceString: MVSDEDELNL LVIVVDANPI WWGKQALKES QFTLSKCIDA VMVLGNSHLF MNRSNKLAVI ASHIQESRFL YPGKNGRLGD FFGDPGNPP EFNPSGSKDG KYELLTSANE VIVEEIKDLM TKSDIKGQHT ETLLAGSLAK ALCYIHRMNK EVKDNQEMKS R ILVIKAAE ...String:
MVSDEDELNL LVIVVDANPI WWGKQALKES QFTLSKCIDA VMVLGNSHLF MNRSNKLAVI ASHIQESRFL YPGKNGRLGD FFGDPGNPP EFNPSGSKDG KYELLTSANE VIVEEIKDLM TKSDIKGQHT ETLLAGSLAK ALCYIHRMNK EVKDNQEMKS R ILVIKAAE DSALQYMNFM NVIFAAQKQN ILIDACVLDS DSGLLQQACD ITGGLYLKVP QMPSLLQYLL WVFLPDQDQR SQ LILPPPV HVDYRAACFC HRNLIEIGYV CSVCLSIFCN FSPICTTCET AFKISLPPVL KAKKKKLKVS A

UniProtKB: General transcription factor IIH subunit 3

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Macromolecule #7: scp-X

MacromoleculeName: scp-X / type: dna / ID: 7 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 5.879866 KDa
SequenceString:
(DA)(DT)(DT)(DG)(DC)(DC)(DG)(DA)(DA)(DG) (DA)(DC)(DG)(DA)(DA)(DA)(DA)(DA)(DA)

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Macromolecule #8: scp-Y

MacromoleculeName: scp-Y / type: dna / ID: 8 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 6.071922 KDa
SequenceString:
(DT)(DT)(DT)(DT)(DT)(DT)(DT)(DC)(DG)(DT) (DC)(DT)(DT)(DC)(DG)(DG)(DC)(DA)(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

Concentration0.1 mg/mL
BufferpH: 7.9
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK IV
Details: Blot for 4 seconds before plunging into liquid ethane (FEI VITROBOT MARK IV)..

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 42.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 4.0 µm / Nominal defocus min: 2.0 µm / Nominal magnification: 27500
Sample stageSpecimen holder model: GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: EMDB MAP
EMDB ID:

2308

Final reconstructionResolution.type: BY AUTHOR / Resolution: 10.0 Å / Resolution method: FSC 0.5 CUT-OFF / Software - Name: RELION (ver. 1.4beta) / Number images used: 219771
Initial angle assignmentType: PROJECTION MATCHING
Final angle assignmentType: PROJECTION MATCHING

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Atomic model buiding 1

RefinementProtocol: FLEXIBLE FIT
Output model

PDB-5ivw:
Human core TFIIH bound to DNA within the PIC

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