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- EMDB-30914: A refined cryo-EM structure of an Escherichia coli RNAP-promoter ... -

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Basic information

Entry
Database: EMDB / ID: EMD-30914
TitleA refined cryo-EM structure of an Escherichia coli RNAP-promoter open complex (RPo) with SspA
Map data
Sample
  • Cell: an Escherichia coli RNAP-promoter open complex (RPo) with SspA
    • DNA: DNA (63-MER)
    • Protein or peptide: Stringent starvation protein A
    • Protein or peptide: DNA-directed RNA polymerase subunit alpha
    • Protein or peptide: DNA-directed RNA polymerase subunit beta
    • Protein or peptide: DNA-directed RNA polymerase subunit beta'
    • Protein or peptide: RNA polymerase sigma factor RpoD
    • DNA: DNA (63-MER)
    • Protein or peptide: DNA-directed RNA polymerase subunit omega
  • Ligand: MAGNESIUM ION
  • Ligand: ZINC ION
Keywordsbacterial RNA polymerase / Complex / TRANSCRIPTION
Function / homology
Function and homology information


sigma factor antagonist complex / response to starvation / response to stress / submerged biofilm formation / cellular response to cell envelope stress / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly / cytosolic DNA-directed RNA polymerase complex / bacterial-type flagellum-dependent cell motility ...sigma factor antagonist complex / response to starvation / response to stress / submerged biofilm formation / cellular response to cell envelope stress / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly / cytosolic DNA-directed RNA polymerase complex / bacterial-type flagellum-dependent cell motility / nitrate assimilation / regulation of DNA-templated transcription elongation / transcription elongation factor complex / transcription antitermination / cell motility / DNA-templated transcription initiation / ribonucleoside binding / DNA-directed RNA polymerase / DNA-directed RNA polymerase activity / response to heat / intracellular iron ion homeostasis / protein dimerization activity / response to antibiotic / negative regulation of DNA-templated transcription / DNA-templated transcription / positive regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / membrane / cytoplasm / cytosol
Similarity search - Function
Stringent starvation protein A, N-terminal / Stringent starvation protein A, C-terminal / : / : / RNA polymerase sigma factor 70, non-essential domain / Sigma-70, non-essential region / RNA polymerase sigma factor 70, region 1.1 / Sigma-70 factor, region 1.1 superfamily / Sigma-70 factor, region 1.1 / Glutathione S-transferase, C-terminal domain ...Stringent starvation protein A, N-terminal / Stringent starvation protein A, C-terminal / : / : / RNA polymerase sigma factor 70, non-essential domain / Sigma-70, non-essential region / RNA polymerase sigma factor 70, region 1.1 / Sigma-70 factor, region 1.1 superfamily / Sigma-70 factor, region 1.1 / Glutathione S-transferase, C-terminal domain / Sigma-70 factors family signature 1. / RNA polymerase sigma factor RpoD, C-terminal / RNA polymerase sigma factor RpoD / : / RNA polymerase sigma-70 region 1.2 / Sigma-70 factor, region 1.2 / RNA polymerase sigma-70 region 3 / Sigma-70 region 3 / Sigma-70 factors family signature 2. / RNA polymerase sigma-70 / Glutathione S-transferase, N-terminal domain / RNA polymerase sigma-70 region 4 / Sigma-70, region 4 / Glutathione transferase family / RNA polymerase sigma-70 region 2 / RNA polymerase sigma-70 like domain / Sigma-70 region 2 / RNA polymerase sigma factor, region 2 / RNA polymerase sigma factor, region 3/4-like / Glutathione S-transferase, C-terminal / Glutathione S-transferase, C-terminal-like / Soluble glutathione S-transferase C-terminal domain profile. / Soluble glutathione S-transferase N-terminal domain profile. / Glutathione S-transferase, N-terminal / Glutathione S-transferase, C-terminal domain superfamily / DNA-directed RNA polymerase, omega subunit / DNA-directed RNA polymerase, subunit beta-prime, bacterial type / DNA-directed RNA polymerase, beta subunit, external 1 domain superfamily / DNA-directed RNA polymerase, beta subunit, external 1 domain / RNA polymerase beta subunit external 1 domain / RNA polymerase, alpha subunit, C-terminal / Bacterial RNA polymerase, alpha chain C terminal domain / DNA-directed RNA polymerase beta subunit, bacterial-type / DNA-directed RNA polymerase, alpha subunit / DNA-directed RNA polymerase, subunit beta-prime / RNA polymerase Rpb6 / RNA polymerase, subunit omega/Rpo6/RPB6 / RNA polymerase Rpb6 / RNA polymerase Rpb2, domain 2 superfamily / RNA polymerase Rpb1, domain 3 superfamily / RPB6/omega subunit-like 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 / 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 / DNA-directed RNA polymerase, insert domain superfamily / RNA polymerase, N-terminal / RNA polymerase Rpb2, domain 2 / RNA polymerase Rpb1, funnel domain superfamily / RNA polymerase Rpb2, domain 2 / RNA polymerase I subunit A N-terminus / RNA polymerase, RBP11-like subunit / RNA polymerase, beta subunit, conserved site / RNA polymerase Rpb2, domain 7 / RNA polymerase Rpb2, domain 3 / RNA polymerase Rpb2, OB-fold / RNA polymerase Rpb2, domain 7 / RNA polymerase Rpb2, domain 3 / RNA polymerases beta chain signature. / DNA-directed RNA polymerase, subunit 2, hybrid-binding domain / DNA-directed RNA polymerase, subunit 2 / DNA-directed RNA polymerase, subunit 2, hybrid-binding domain superfamily / RNA polymerase Rpb2, domain 6 / Thioredoxin-like superfamily / Winged helix-like DNA-binding domain superfamily
Similarity search - Domain/homology
DNA-directed RNA polymerase subunit alpha / DNA-directed RNA polymerase subunit omega / RNA polymerase sigma factor RpoD / DNA-directed RNA polymerase subunit beta' / DNA-directed RNA polymerase subunit beta / Stringent starvation protein A
Similarity search - Component
Biological speciesEscherichia coli (strain K12) (bacteria) / Escherichia coli (E. coli)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.68 Å
AuthorsLin W
CitationJournal: Biochem Biophys Res Commun / Year: 2021
Title: A unique binding between SspA and RNAP βNTH across low-GC Gram-negative bacteria facilitates SspA-mediated transcription regulation.
Authors: Fulin Wang / Yu Feng / Zhuo Shang / Wei Lin /
Abstract: Stringent starvation protein A (SspA) involved in nucleotide metabolism, acid tolerance and virulence of bacteria has been demonstrated to function as a transcription factor to regulate σ-dependent ...Stringent starvation protein A (SspA) involved in nucleotide metabolism, acid tolerance and virulence of bacteria has been demonstrated to function as a transcription factor to regulate σ-dependent gene transcription through interacting with σ region 4 and the zinc binding domain (ZBD) of E. coli RNA polymerase (EcoRNAP) β' subunit simultaneously. Despite extensive biochemical and structural analyses were reported recently, the interactions of SspA with RNAP are not comprehensively understood. Here, we reprocessed our previous cryo-EM dataset of EcoRNAP-promoter open complex with SspA (SspA-RPo) and obtained a significantly improved density map. Unexpectedly, the new map showed that SspA interacts with both N-terminal helix of β' subunit (β'ΝΤΗ) and ω subunit, which contributes to stabilize the SspA-EcoRNAP σ holoenzyme complex. Sequence alignments and phylogenetic tree analyses of N-terminal sequences of β' subunit from different classes of bacteria revealed that β'ΝΤΗ is highly conserved and exclusively found in low-GC-content Gram-negative bacteria that harbor SspA, implying a co-evolution of β'ΝΤΗ and SspA. The transcription assays of wild-type SspA and its mutants demonstrated the interaction between SspA and β'ΝΤΗ facilitates the transcription regulation of SspA. Together, our results provide a more comprehensive insight into the interactions between SspA and RNAP and their roles in bacterial transcription regulation.
History
DepositionJan 20, 2021-
Header (metadata) releaseNov 17, 2021-
Map releaseNov 17, 2021-
UpdateMar 5, 2025-
Current statusMar 5, 2025Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.026
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 0.026
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7dy6
  • Surface level: 0.026
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_30914.png

Downloads & links

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Map

FileDownload / File: emd_30914.map.gz / Format: CCP4 / Size: 30.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.31 Å/pix.
x 200 pix.
= 261.4 Å		1.31 Å/pix.
x 200 pix.
= 261.4 Å		1.31 Å/pix.
x 200 pix.
= 261.4 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.307 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.026 / Movie #1: 0.026
Minimum - Maximum-0.11214841 - 0.17042832
Average (Standard dev.)0.00005640587 (±0.0075381338)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions200200200
Spacing200200200
CellA=B=C: 261.4 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.3071.3071.307
M x/y/z200200200
origin x/y/z0.0000.0000.000
length x/y/z261.400261.400261.400
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ256256256
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS200200200
D min/max/mean-0.1120.1700.000

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Supplemental data

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Sample components

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Entire : an Escherichia coli RNAP-promoter open complex (RPo) with SspA

EntireName: an Escherichia coli RNAP-promoter open complex (RPo) with SspA
Components
  • Cell: an Escherichia coli RNAP-promoter open complex (RPo) with SspA
    • DNA: DNA (63-MER)
    • Protein or peptide: Stringent starvation protein A
    • Protein or peptide: DNA-directed RNA polymerase subunit alpha
    • Protein or peptide: DNA-directed RNA polymerase subunit beta
    • Protein or peptide: DNA-directed RNA polymerase subunit beta'
    • Protein or peptide: RNA polymerase sigma factor RpoD
    • DNA: DNA (63-MER)
    • Protein or peptide: DNA-directed RNA polymerase subunit omega
  • Ligand: MAGNESIUM ION
  • Ligand: ZINC ION

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Supramolecule #1: an Escherichia coli RNAP-promoter open complex (RPo) with SspA

SupramoleculeName: an Escherichia coli RNAP-promoter open complex (RPo) with SspA
type: cell / ID: 1 / Parent: 0 / Macromolecule list: #1-#8
Source (natural)Organism: Escherichia coli (strain K12) (bacteria)

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Macromolecule #1: DNA (63-MER)

MacromoleculeName: DNA (63-MER) / type: dna / ID: 1 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 19.671666 KDa
SequenceString: (DA)(DA)(DC)(DA)(DA)(DA)(DA)(DT)(DG)(DA) (DT)(DT)(DG)(DA)(DC)(DA)(DA)(DA)(DA)(DG) (DT)(DG)(DT)(DT)(DA)(DA)(DA)(DT)(DT) (DG)(DT)(DG)(DC)(DT)(DA)(DT)(DA)(DA)(DT) (DG) (DG)(DG)(DA)(DG)(DC)(DT) ...String:
(DA)(DA)(DC)(DA)(DA)(DA)(DA)(DT)(DG)(DA) (DT)(DT)(DG)(DA)(DC)(DA)(DA)(DA)(DA)(DG) (DT)(DG)(DT)(DT)(DA)(DA)(DA)(DT)(DT) (DG)(DT)(DG)(DC)(DT)(DA)(DT)(DA)(DA)(DT) (DG) (DG)(DG)(DA)(DG)(DC)(DT)(DG)(DT) (DC)(DA)(DC)(DG)(DG)(DA)(DT)(DG)(DC)(DA) (DG)(DG) (DG)(DG)(DA)

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Macromolecule #7: DNA (63-MER)

MacromoleculeName: DNA (63-MER) / type: dna / ID: 7 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 19.159285 KDa
SequenceString: (DT)(DC)(DC)(DC)(DC)(DT)(DG)(DC)(DA)(DT) (DC)(DC)(DG)(DT)(DG)(DA)(DC)(DA)(DG)(DC) (DT)(DC)(DC)(DC)(DA)(DT)(DT)(DA)(DT) (DA)(DG)(DC)(DA)(DC)(DA)(DA)(DT)(DT)(DT) (DA) (DA)(DC)(DA)(DC)(DT)(DT) ...String:
(DT)(DC)(DC)(DC)(DC)(DT)(DG)(DC)(DA)(DT) (DC)(DC)(DG)(DT)(DG)(DA)(DC)(DA)(DG)(DC) (DT)(DC)(DC)(DC)(DA)(DT)(DT)(DA)(DT) (DA)(DG)(DC)(DA)(DC)(DA)(DA)(DT)(DT)(DT) (DA) (DA)(DC)(DA)(DC)(DT)(DT)(DT)(DT) (DG)(DT)(DC)(DA)(DA)(DT)(DC)(DA)(DT)(DT) (DT)(DT) (DG)(DT)(DT)

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Macromolecule #2: Stringent starvation protein A

MacromoleculeName: Stringent starvation protein A / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (strain K12) (bacteria)
Molecular weightTheoretical: 24.332885 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString: MAVAANKRSV MTLFSGPTDI YSHQVRIVLA EKGVSFEIEH VEKDNPPQDL IDLNPNQSVP TLVDRELTLW ESRIIMEYLD ERFPHPPLM PVYPVARGES RLYMHRIEKD WYTLMNTIIN GSASEADAAR KQLREELLAI APVFGQKPYF LSDEFSLVDC Y LAPLLWRL ...String:
MAVAANKRSV MTLFSGPTDI YSHQVRIVLA EKGVSFEIEH VEKDNPPQDL IDLNPNQSVP TLVDRELTLW ESRIIMEYLD ERFPHPPLM PVYPVARGES RLYMHRIEKD WYTLMNTIIN GSASEADAAR KQLREELLAI APVFGQKPYF LSDEFSLVDC Y LAPLLWRL PQLGIEFSGP GAKELKGYMT RVFERDSFLA SLTEAEREMR LGRS

UniProtKB: Stringent starvation protein A

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Macromolecule #3: DNA-directed RNA polymerase subunit alpha

MacromoleculeName: DNA-directed RNA polymerase subunit alpha / type: protein_or_peptide / ID: 3 / Number of copies: 3 / Enantiomer: LEVO / EC number: DNA-directed RNA polymerase
Source (natural)Organism: Escherichia coli (strain K12) (bacteria)
Molecular weightTheoretical: 36.55868 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString: MQGSVTEFLK PRLVDIEQVS STHAKVTLEP LERGFGHTLG NALRRILLSS MPGCAVTEVE IDGVLHEYST KEGVQEDILE ILLNLKGLA VRVQGKDEVI LTLNKSGIGP VTAADITHDG DVEIVKPQHV ICHLTDENAS ISMRIKVQRG RGYVPASTRI H SEEDERPI ...String:
MQGSVTEFLK PRLVDIEQVS STHAKVTLEP LERGFGHTLG NALRRILLSS MPGCAVTEVE IDGVLHEYST KEGVQEDILE ILLNLKGLA VRVQGKDEVI LTLNKSGIGP VTAADITHDG DVEIVKPQHV ICHLTDENAS ISMRIKVQRG RGYVPASTRI H SEEDERPI GRLLVDACYS PVERIAYNVE AARVEQRTDL DKLVIEMETN GTIDPEEAIR RAATILAEQL EAFVDLRDVR QP EVKEEKP EFDPILLRPV DDLELTVRSA NCLKAEAIHY IGDLVQRTEV ELLKTPNLGK KSLTEIKDVL ASRGLSLGMR LEN WPPASI ADE

UniProtKB: DNA-directed RNA polymerase subunit alpha

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Macromolecule #4: DNA-directed RNA polymerase subunit beta

MacromoleculeName: DNA-directed RNA polymerase subunit beta / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA-directed RNA polymerase
Source (natural)Organism: Escherichia coli (strain K12) (bacteria)
Molecular weightTheoretical: 150.804922 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString: MVYSYTEKKR IRKDFGKRPQ VLDVPYLLSI QLDSFQKFIE QDPEGQYGLE AAFRSVFPIQ SYSGNSELQY VSYRLGEPVF DVQECQIRG VTYSAPLRVK LRLVIYEREA PEGTVKDIKE QEVYMGEIPL MTDNGTFVIN GTERVIVSQL HRSPGVFFDS D KGKTHSSG ...String:
MVYSYTEKKR IRKDFGKRPQ VLDVPYLLSI QLDSFQKFIE QDPEGQYGLE AAFRSVFPIQ SYSGNSELQY VSYRLGEPVF DVQECQIRG VTYSAPLRVK LRLVIYEREA PEGTVKDIKE QEVYMGEIPL MTDNGTFVIN GTERVIVSQL HRSPGVFFDS D KGKTHSSG KVLYNARIIP YRGSWLDFEF DPKDNLFVRI DRRRKLPATI ILRALNYTTE QILDLFFEKV IFEIRDNKLQ ME LVPERLR GETASFDIEA NGKVYVEKGR RITARHIRQL EKDDVKLIEV PVEYIAGKVV AKDYIDESTG ELICAANMEL SLD LLAKLS QSGHKRIETL FTNDLDHGPY ISETLRVDPT NDRLSALVEI YRMMRPGEPP TREAAESLFE NLFFSEDRYD LSAV GRMKF NRSLLREEIE GSGILSKDDI IDVMKKLIDI RNGKGEVDDI DHLGNRRIRS VGEMAENQFR VGLVRVERAV KERLS LGDL DTLMPQDMIN AKPISAAVKE FFGSSQLSQF MVQNNPLSEI THKRRISALG PGGLTRERAG FEVRDVHPTH YGRVCP IET PEGPNIGLIN SLSVYAQTNE YGFLETPYRK VTDGVVTDEI HYLSAIEEGN YVIAQANSNL DEEGHFVEDL VTCRSKG ES SLFSRDQVDY MDVSTQQVVS VGASLIPFLE HDDANRALMG ANMQRQAVPT LRADKPLVGT GMERAVAVDS GVTAVAKR G GVVQYVDASR IVIKVNEDEM YPGEAGIDIY NLTKYTRSNQ NTCINQMPCV SLGEPVERGD VLADGPSTDL GELALGQNM RVAFMPWNGY NFEDSILVSE RVVQEDRFTT IHIQELACVS RDTKLGPEEI TADIPNVGEA ALSKLDESGI VYIGAEVTGG DILVGKVTP KGETQLTPEE KLLRAIFGEK ASDVKDSSLR VPNGVSGTVI DVQVFTRDGV EKDKRALEIE EMQLKQAKKD L SEELQILE AGLFSRIRAV LVAGGVEAEK LDKLPRDRWL ELGLTDEEKQ NQLEQLAEQY DELKHEFEKK LEAKRRKITQ GD DLAPGVL KIVKVYLAVK RRIQPGDKMA GRHGNKGVIS KINPIEDMPY DENGTPVDIV LNPLGVPSRM NIGQILETHL GMA AKGIGD KINAMLKQQQ EVAKLREFIQ RAYDLGADVR QKVDLSTFSD EEVMRLAENL RKGMPIATPV FDGAKEAEIK ELLK LGDLP TSGQIRLYDG RTGEQFERPV TVGYMYMLKL NHLVDDKMHA RSTGSYSLVT QQPLGGKAQF GGQRFGEMEV WALEA YGAA YTLQEMLTVK SDDVNGRTKM YKNIVDGNHQ MEPGMPESFN VLLKEIRSLG INIELEDE

UniProtKB: DNA-directed RNA polymerase subunit beta

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Macromolecule #5: DNA-directed RNA polymerase subunit beta'

MacromoleculeName: DNA-directed RNA polymerase subunit beta' / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA-directed RNA polymerase
Source (natural)Organism: Escherichia coli (strain K12) (bacteria)
Molecular weightTheoretical: 155.366781 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString: MKDLLKFLKA QTKTEEFDAI KIALASPDMI RSWSFGEVKK PETINYRTFK PERDGLFCAR IFGPVKDYEC LCGKYKRLKH RGVICEKCG VEVTQTKVRR ERMGHIELAS PTAHIWFLKS LPSRIGLLLD MPLRDIERVL YFESYVVIEG GMTNLERQQI L TEEQYLDA ...String:
MKDLLKFLKA QTKTEEFDAI KIALASPDMI RSWSFGEVKK PETINYRTFK PERDGLFCAR IFGPVKDYEC LCGKYKRLKH RGVICEKCG VEVTQTKVRR ERMGHIELAS PTAHIWFLKS LPSRIGLLLD MPLRDIERVL YFESYVVIEG GMTNLERQQI L TEEQYLDA LEEFGDEFDA KMGAEAIQAL LKSMDLEQEC EQLREELNET NSETKRKKLT KRIKLLEAFV QSGNKPEWMI LT VLPVLPP DLRPLVPLDG GRFATSDLND LYRRVINRNN RLKRLLDLAA PDIIVRNEKR MLQEAVDALL DNGRRGRAIT GSN KRPLKS LADMIKGKQG RFRQNLLGKR VDYSGRSVIT VGPYLRLHQC GLPKKMALEL FKPFIYGKLE LRGLATTIKA AKKM VEREE AVVWDILDEV IREHPVLLNR APTLHRLGIQ AFEPVLIEGK AIQLHPLVCA AYNADFDGDQ MAVHVPLTLE AQLEA RALM MSTNNILSPA NGEPIIVPSQ DVVLGLYYMT RDCVNAKGEG MVLTGPKEAE RLYRSGLASL HARVKVRITE YEKDAN GEL VAKTSLKDTT VGRAILWMIV PKGLPYSIVN QALGKKAISK MLNTCYRILG LKPTVIFADQ IMYTGFAYAA RSGASVG ID DMVIPEKKHE IISEAEAEVA EIQEQFQSGL VTAGERYNKV IDIWAAANDR VSKAMMDNLQ TETVINRDGQ EEKQVSFN S IYMMADSGAR GSAAQIRQLA GMRGLMAKPD GSIIETPITA NFREGLNVLQ YFISTHGARK GLADTALKTA NSGYLTRRL VDVAQDLVVT EDDCGTHEGI MMTPVIEGGD VKEPLRDRVL GRVTAEDVLK PGTADILVPR NTLLHEQWCD LLEENSVDAV KVRSVVSCD TDFGVCAHCY GRDLARGHII NKGEAIGVIA AQSIGEPGTQ LTMRTFHIGG AASRAAAESS IQVKNKGSIK L SNVKSVVN SSGKLVITSR NTELKLIDEF GRTKESYKVP YGAVLAKGDG EQVAGGETVA NWDPHTMPVI TEVSGFVRFT DM IDGQTIT RQTDELTGLS SLVVLDSAER TAGGKDLRPA LKIVDAQGND VLIPGTDMPA QYFLPGKAIV QLEDGVQISS GDT LARIPQ ESGGTKDITG GLPRVADLFE ARRPKEPAIL AEISGIVSFG KETKGKRRLV ITPVDGSDPY EEMIPKWRQL NVFE GERVE RGDVISDGPE APHDILRLRG VHAVTRYIVN EVQDVYRLQG VKINDKHIEV IVRQMLRKAT IVNAGSSDFL EGEQV EYSR VKIANRELEA NGKVGATYSR DLLGITKASL ATESFISAAS FQETTRVLTE AAVAGKRDEL RGLKENVIVG RLIPAG TGY AYHQDRMRRR AAGEAPAAPQ VTAEDASASL AELLNAGLGG SDNE

UniProtKB: DNA-directed RNA polymerase subunit beta'

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Macromolecule #6: RNA polymerase sigma factor RpoD

MacromoleculeName: RNA polymerase sigma factor RpoD / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (strain K12) (bacteria)
Molecular weightTheoretical: 70.352242 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString: MEQNPQSQLK LLVTRGKEQG YLTYAEVNDH LPEDIVDSDQ IEDIIQMIND MGIQVMEEAP DADDLMLAEN TADEDAAEAA AQVLSSVES EIGRTTDPVR MYMREMGTVE LLTREGEIDI AKRIEDGINQ VQCSVAEYPE AITYLLEQYD RVEAEEARLS D LITGFVDP ...String:
MEQNPQSQLK LLVTRGKEQG YLTYAEVNDH LPEDIVDSDQ IEDIIQMIND MGIQVMEEAP DADDLMLAEN TADEDAAEAA AQVLSSVES EIGRTTDPVR MYMREMGTVE LLTREGEIDI AKRIEDGINQ VQCSVAEYPE AITYLLEQYD RVEAEEARLS D LITGFVDP NAEEDLAPTA THVGSELSQE DLDDDEDEDE EDGDDDSADD DNSIDPELAR EKFAELRAQY VVTRDTIKAK GR SHATAQE EILKLSEVFK QFRLVPKQFD YLVNSMRVMM DRVRTQERLI MKLCVEQCKM PKKNFITLFT GNETSDTWFN AAI AMNKPW SEKLHDVSEE VHRALQKLQQ IEEETGLTIE QVKDINRRMS IGEAKARRAK KEMVEANLRL VISIAKKYTN RGLQ FLDLI QEGNIGLMKA VDKFEYRRGY KFSTYATWWI RQAITRSIAD QARTIRIPVH MIETINKLNR ISRQMLQEMG REPTP EELA ERMLMPEDKI RKVLKIAKEP ISMETPIGDD EDSHLGDFIE DTTLELPLDS ATTESLRAAT HDVLAGLTAR EAKVLR MRF GIDMNTDYTL EEVGKQFDVT RERIRQIEAK ALRKLRHPSR SEVLRSFLDD

UniProtKB: RNA polymerase sigma factor RpoD

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Macromolecule #8: DNA-directed RNA polymerase subunit omega

MacromoleculeName: DNA-directed RNA polymerase subunit omega / type: protein_or_peptide / ID: 8 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA-directed RNA polymerase
Source (natural)Organism: Escherichia coli (strain K12) (bacteria)
Molecular weightTheoretical: 10.249547 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString:
MARVTVQDAV EKIGNRFDLV LVAARRARQM QVGGKDPLVP EENDKTTVIA LREIEEGLIN NQILDVRERQ EQQEQEAAEL QAVTAIAEG RR

UniProtKB: DNA-directed RNA polymerase subunit omega

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Macromolecule #9: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 9 / Number of copies: 1 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #10: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 10 / Number of copies: 2 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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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

BufferpH: 7.9
GridMaterial: COPPER
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI/PHILIPS CM300FEG/T
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 59.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELD

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Image processing

Startup modelType of model: EMDB MAP
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.68 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 60145
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION
Final 3D classificationNumber classes: 4

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Aug 12, 2020. Covid-19 info

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