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- EMDB-13829: Cryo-EM structure of Mycobacterium tuberculosis RNA polymerase ho... -

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Basic information

Entry
Database: EMDB / ID: EMD-13829
TitleCryo-EM structure of Mycobacterium tuberculosis RNA polymerase holoenzyme dimer comprising sigma factor SigB
Map dataprimary map
Sample
  • Complex: RNA polymerase holoenzyme with sigma factor sigB
    • Protein or peptide: DNA-directed RNA polymerase subunit alphaPolymerase
    • Protein or peptide: DNA-directed RNA polymerase subunit betaPolymerase
    • Protein or peptide: DNA-directed RNA polymerase subunit beta'Polymerase
    • Protein or peptide: DNA-directed RNA polymerase subunit omegaPolymerase
    • Protein or peptide: RNA polymerase sigma factor SigB
  • Ligand: ZINC ION
  • Ligand: MAGNESIUM ION
Function / homology
Function and homology information


RNA polymerase core enzyme binding / Antimicrobial action and antimicrobial resistance in Mtb / sigma factor activity / peptidoglycan-based cell wall / DNA-directed RNA polymerase complex / DNA-templated transcription initiation / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / response to heat ...RNA polymerase core enzyme binding / Antimicrobial action and antimicrobial resistance in Mtb / sigma factor activity / peptidoglycan-based cell wall / DNA-directed RNA polymerase complex / DNA-templated transcription initiation / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / response to heat / response to hypoxia / protein dimerization activity / response to xenobiotic stimulus / response to antibiotic / DNA-templated transcription / positive regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / plasma membrane / cytosol / cytoplasm
Similarity search - Function
Sigma-70 factors family signature 1. / 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 / RNA polymerase sigma-70 region 4 / Sigma-70, region 4 / RNA polymerase sigma-70 region 2 ...Sigma-70 factors family signature 1. / 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 / RNA polymerase sigma-70 region 4 / Sigma-70, region 4 / 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 / 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, alpha subunit / DNA-directed RNA polymerase beta subunit, bacterial-type / RNA polymerase Rpb6 / RNA polymerase, subunit omega/Rpo6/RPB6 / RNA polymerase Rpb6 / RNA polymerase Rpb1, domain 3 superfamily / RNA polymerase Rpb1, clamp domain superfamily / RPB6/omega subunit-like superfamily / DNA-directed RNA polymerase, subunit beta-prime / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb2, domain 2 superfamily / RNA polymerase Rpb1, domain 1 / RNA polymerase Rpb1, domain 1 / RNA polymerase, alpha subunit / RNA polymerase Rpb1, domain 4 / RNA polymerase Rpb1, domain 2 / RNA polymerase Rpb1, domain 4 / RNA polymerase, N-terminal / RNA polymerase Rpb1, funnel domain superfamily / RNA polymerase I subunit A N-terminus / RNA polymerase Rpb1, domain 5 / RNA polymerase Rpb1, domain 5 / RNA polymerase, beta subunit, protrusion / RNA polymerase beta subunit / 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 / DNA-directed RNA polymerase, insert domain superfamily / RNA polymerase, RBP11-like subunit / RNA polymerase Rpb2, domain 2 / RNA polymerase Rpb2, domain 2 / 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 / Winged helix-like DNA-binding domain superfamily
Similarity search - Domain/homology
RNA polymerase sigma factor SigB / DNA-directed RNA polymerase subunit omega / DNA-directed RNA polymerase subunit beta' / DNA-directed RNA polymerase subunit beta / DNA-directed RNA polymerase subunit alpha
Similarity search - Component
Biological speciesMycobacterium tuberculosis H37Rv (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.36 Å
AuthorsBrodolin K
Funding support France, 1 items
OrganizationGrant numberCountry
Agence Nationale de la Recherche (ANR)ANR-16-CE11-0025 France
Citation
Journal: Nucleic Acids Res / Year: 2014
Title: Mycobacterium RbpA cooperates with the stress-response σB subunit of RNA polymerase in promoter DNA unwinding.
Authors: Yangbo Hu / Zakia Morichaud / Ayyappasamy Sudalaiyadum Perumal / Françoise Roquet-Baneres / Konstantin Brodolin /
Abstract: RbpA, a transcriptional activator that is essential for Mycobacterium tuberculosis replication and survival during antibiotic treatment, binds to RNA polymerase (RNAP) in the absence of promoter DNA. ...RbpA, a transcriptional activator that is essential for Mycobacterium tuberculosis replication and survival during antibiotic treatment, binds to RNA polymerase (RNAP) in the absence of promoter DNA. It has been hypothesized that RbpA stimulates housekeeping gene expression by promoting assembly of the σ(A) subunit with core RNAP. Here, using a purified in vitro transcription system of M. tuberculosis, we show that RbpA functions in a promoter-dependent manner as a companion of RNAP essential for promoter DNA unwinding and formation of the catalytically active open promoter complex (RPo). Screening for RbpA activity using a full panel of the M. tuberculosis σ subunits demonstrated that RbpA targets σ(A) and stress-response σ(B), but not the alternative σ subunits from the groups 3 and 4. In contrast to σ(A), the σ(B) subunit activity displayed stringent dependency upon RbpA. These results suggest that RbpA-dependent control of RPo formation provides a mechanism for tuning gene expression during the switch between different physiological states, and in the stress response.
#1: Journal: Biorxiv / Year: 2022
Title: Structural basis of the mycobacterial stress-response RNA polymerase auto-inhibition via oligomerization
Authors: Morichaud Z / Trapani S / Vishwakarma R / Chaloin L / Lionne C / Lai-Kee-Him J / Bron P / Brodolin K
History
DepositionNov 3, 2021-
Header (metadata) releaseNov 16, 2022-
Map releaseNov 16, 2022-
UpdateFeb 8, 2023-
Current statusFeb 8, 2023Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_13829.png

Downloads & links

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Map

FileDownload / File: emd_13829.map.gz / Format: CCP4 / Size: 347.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationprimary map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.1 Å/pix.
x 450 pix.
= 495. Å		1.1 Å/pix.
x 450 pix.
= 495. Å		1.1 Å/pix.
x 450 pix.
= 495. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.1 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.2
Minimum - Maximum-0.3398776 - 1.2792665
Average (Standard dev.)-0.0022798674 (±0.038271423)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions450450450
Spacing450450450
CellA=B=C: 495.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_13829_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: raw map

Fileemd_13829_additional_1.map
Annotationraw map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
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Histogram

Histogram (log scale)

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Sample components

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Entire : RNA polymerase holoenzyme with sigma factor sigB

EntireName: RNA polymerase holoenzyme with sigma factor sigB
Components
  • Complex: RNA polymerase holoenzyme with sigma factor sigB
    • Protein or peptide: DNA-directed RNA polymerase subunit alphaPolymerase
    • Protein or peptide: DNA-directed RNA polymerase subunit betaPolymerase
    • Protein or peptide: DNA-directed RNA polymerase subunit beta'Polymerase
    • Protein or peptide: DNA-directed RNA polymerase subunit omegaPolymerase
    • Protein or peptide: RNA polymerase sigma factor SigB
  • Ligand: ZINC ION
  • Ligand: MAGNESIUM ION

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Supramolecule #1: RNA polymerase holoenzyme with sigma factor sigB

SupramoleculeName: RNA polymerase holoenzyme with sigma factor sigB / type: complex / ID: 1 / Chimera: Yes / Parent: 0 / Macromolecule list: #1-#5
Details: RNA polymerase holoenzyme assembled from individually expressed RNA polymerase core and sigma factor sigB
Source (natural)Organism: Mycobacterium tuberculosis H37Rv (bacteria)
Molecular weightTheoretical: 800 KDa

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Macromolecule #1: DNA-directed RNA polymerase subunit alpha

MacromoleculeName: DNA-directed RNA polymerase subunit alpha / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO / EC number: DNA-directed RNA polymerase
Source (natural)Organism: Mycobacterium tuberculosis H37Rv (bacteria) / Strain: ATCC 25618 / H37Rv
Molecular weightTheoretical: 37.745328 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: MLISQRPTLS EDVLTDNRSQ FVIEPLEPGF GYTLGNSLRR TLLSSIPGAA VTSIRIDGVL HEFTTVPGVK EDVTEIILNL KSLVVSSEE DEPVTMYLRK QGPGEVTAGD IVPPAGVTVH NPGMHIATLN DKGKLEVELV VERGRGYVPA VQNRASGAEI G RIPVDSIY ...String:
MLISQRPTLS EDVLTDNRSQ FVIEPLEPGF GYTLGNSLRR TLLSSIPGAA VTSIRIDGVL HEFTTVPGVK EDVTEIILNL KSLVVSSEE DEPVTMYLRK QGPGEVTAGD IVPPAGVTVH NPGMHIATLN DKGKLEVELV VERGRGYVPA VQNRASGAEI G RIPVDSIY SPVLKVTYKV DATRVEQRTD FDKLILDVET KNSISPRDAL ASAGKTLVEL FGLARELNVE AEGIEIGPSP AE ADHIASF ALPIDDLDLT VRSYNCLKRE GVHTVGELVA RTESDLLDIR NFGQKSIDEV KIKLHQLGLS LKDSPPSFDP SEV AGYDVA TGTWSTEGAY DEQDYAETEQ L

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Macromolecule #2: DNA-directed RNA polymerase subunit beta

MacromoleculeName: DNA-directed RNA polymerase subunit beta / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO / EC number: DNA-directed RNA polymerase
Source (natural)Organism: Mycobacterium tuberculosis H37Rv (bacteria) / Strain: ATCC 25618 / H37Rv
Molecular weightTheoretical: 129.602344 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: MVLADSRQSK TAASPSPSRP QSSSNNSVPG APNRVSFAKL REPLEVPGLL DVQTDSFEWL IGSPRWRESA AERGDVNPVG GLEEVLYEL SPIEDFSGSM SLSFSDPRFD DVKAPVDECK DKDMTYAAPL FVTAEFINNN TGEIKSQTVF MGDFPMMTEK G TFIINGTE ...String:
MVLADSRQSK TAASPSPSRP QSSSNNSVPG APNRVSFAKL REPLEVPGLL DVQTDSFEWL IGSPRWRESA AERGDVNPVG GLEEVLYEL SPIEDFSGSM SLSFSDPRFD DVKAPVDECK DKDMTYAAPL FVTAEFINNN TGEIKSQTVF MGDFPMMTEK G TFIINGTE RVVVSQLVRS PGVYFDETID KSTDKTLHSV KVIPSRGAWL EFDVDKRDTV GVRIDRKRRQ PVTVLLKALG WT SEQIVER FGFSEIMRST LEKDNTVGTD EALLDIYRKL RPGEPPTKES AQTLLENLFF KEKRYDLARV GRYKVNKKLG LHV GEPITS STLTEEDVVA TIEYLVRLHE GQTTMTVPGG VEVPVETDDI DHFGNRRLRT VGELIQNQIR VGMSRMERVV RERM TTQDV EAITPQTLIN IRPVVAAIKE FFGTSQLSQF MDQNNPLSGL THKRRLSALG PGGLSRERAG LEVRDVHPSH YGRMC PIET PEGPNIGLIG SLSVYARVNP FGFIETPYRK VVDGVVSDEI VYLTADEEDR HVVAQANSPI DADGRFVEPR VLVRRK AGE VEYVPSSEVD YMDVSPRQMV SVATAMIPFL EHDDANRALM GANMQRQAVP LVRSEAPLVG TGMELRAAID AGDVVVA EE SGVIEEVSAD YITVMHDNGT RRTYRMRKFA RSNHGTCANQ CPIVDAGDRV EAGQVIADGP CTDDGEMALG KNLLVAIM P WEGHNYEDAI ILSNRLVEED VLTSIHIEEH EIDARDTKLG AEEITRDIPN ISDEVLADLD ERGIVRIGAE VRDGDILVG KVTPKGETEL TPEERLLRAI FGEKAREVRD TSLKVPHGES GKVIGIRVFS REDEDELPAG VNELVRVYVA QKRKISDGDK LAGRHGNKG VIGKILPVED MPFLADGTPV DIILNTHGVP RRMNIGQILE THLGWCAHSG WKVDAAKGVP DWAARLPDEL L EAQPNAIV STPVFDGAQE AELQGLLSCT LPNRDGDVLV DADGKAMLFD GRSGEPFPYP VTVGYMYIMK LHHLVDDKIH AR STGPYSM ITQQPLGGKA QFGGQRFGEM ECWAMQAYGA AYTLQELLTI KSDDTVGRVK VYEAIVKGEN IPEPGIPESF KVL LKELQS LCLNVEVLSS DGAAIELREG EDEDLERAAA NLGINLSRNE SASVEDLA

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Macromolecule #3: DNA-directed RNA polymerase subunit beta'

MacromoleculeName: DNA-directed RNA polymerase subunit beta' / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO / EC number: DNA-directed RNA polymerase
Source (natural)Organism: Mycobacterium tuberculosis H37Rv (bacteria) / Strain: ATCC 25618 / H37Rv
Molecular weightTheoretical: 147.438344 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: VNFFDELRIG LATAEDIRQW SYGEVKKPET INYRTLKPEK DGLFCEKIFG PTRDWECYCG KYKRVRFKGI ICERCGVEVT RAKVRRERM GHIELAAPVT HIWYFKGVPS RLGYLLDLAP KDLEKIIYFA AYVITSVDEE MRHNELSTLE AEMAVERKAV E DQRDGELE ...String:
VNFFDELRIG LATAEDIRQW SYGEVKKPET INYRTLKPEK DGLFCEKIFG PTRDWECYCG KYKRVRFKGI ICERCGVEVT RAKVRRERM GHIELAAPVT HIWYFKGVPS RLGYLLDLAP KDLEKIIYFA AYVITSVDEE MRHNELSTLE AEMAVERKAV E DQRDGELE ARAQKLEADL AELEAEGAKA DARRKVRDGG EREMRQIRDR AQRELDRLED IWSTFTKLAP KQLIVDENLY RE LVDRYGE YFTGAMGAES IQKLIENFDI DAEAESLRDV IRNGKGQKKL RALKRLKVVA AFQQSGNSPM GMVLDAVPVI PPE LRPMVQ LDGGRFATSD LNDLYRRVIN RNNRLKRLID LGAPEIIVNN EKRMLQESVD ALFDNGRRGR PVTGPGNRPL KSLS DLLKG KQGRFRQNLL GKRVDYSGRS VIVVGPQLKL HQCGLPKLMA LELFKPFVMK RLVDLNHAQN IKSAKRMVER QRPQV WDVL EEVIAEHPVL LNRAPTLHRL GIQAFEPMLV EGKAIQLHPL VCEAFNADFD GDQMAVHLPL SAEAQAEARI LMLSSN NIL SPASGRPLAM PRLDMVTGLY YLTTEVPGDT GEYQPASGDH PETGVYSSPA EAIMAADRGV LSVRAKIKVR LTQLRPP VE IEAELFGHSG WQPGDAWMAE TTLGRVMFNE LLPLGYPFVN KQMHKKVQAA IINDLAERYP MIVVAQTVDK LKDAGFYW A TRSGVTVSMA DVLVPPRKKE ILDHYEERAD KVEKQFQRGA LNHDERNEAL VEIWKEATDE VGQALREHYP DDNPIITIV DSGATGNFTQ TRTLAGMKGL VTNPKGEFIP RPVKSSFREG LTVLEYFINT HGARKGLADT ALRTADSGYL TRRLVDVSQD VIVREHDCQ TERGIVVELA ERAPDGTLIR DPYIETSAYA RTLGTDAVDE AGNVIVERGQ DLGDPEIDAL LAAGITQVKV R SVLTCATS TGVCATCYGR SMATGKLVDI GEAVGIVAAQ SIGEPGTQLT MRTFHQGGVG EDITGGLPRV QELFEARVPR GK APIADVT GRVRLEDGER FYKITIVPDD GGEEVVYDKI SKRQRLRVFK HEDGSERVLS DGDHVEVGQQ LMEGSADPHE VLR VQGPRE VQIHLVREVQ EVYRAQGVSI HDKHIEVIVR QMLRRVTIID SGSTEFLPGS LIDRAEFEAE NRRVVAEGGE PAAG RPVLM GITKASLATD SWLSAASFQE TTRVLTDAAI NCRSDKLNGL KENVIIGKLI PAGTGINRYR NIAVQPTEEA RAAAY TIPS YEDQYYSPDF GAATGAAVPL DDYGYSDYRH HHHHH

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Macromolecule #4: DNA-directed RNA polymerase subunit omega

MacromoleculeName: DNA-directed RNA polymerase subunit omega / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO / EC number: DNA-directed RNA polymerase
Source (natural)Organism: Mycobacterium tuberculosis H37Rv (bacteria) / Strain: ATCC 25618 / H37Rv
Molecular weightTheoretical: 11.85114 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
MSISQSDASL AAVPAVDQFD PSSGASGGYD TPLGITNPPI DELLDRVSSK YALVIYAAKR ARQINDYYNQ LGEGILEYVG PLVEPGLQE KPLSIALREI HADLLEHTEG E

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Macromolecule #5: RNA polymerase sigma factor SigB

MacromoleculeName: RNA polymerase sigma factor SigB / type: protein_or_peptide / ID: 5 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Mycobacterium tuberculosis H37Rv (bacteria) / Strain: ATCC 25618 / H37Rv
Molecular weightTheoretical: 38.572773 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: MGSSHHHHHH SSGLVPRGSH MADAPTRATT SRVDSDLDAQ SPAADLVRVY LNGIGKTALL NAAGEVELAK RIEAGLYAEH LLETRKRLG ENRKRDLAAV VRDGEAARRH LLEANLRLVV SLAKRYTGRG MPLLDLIQEG NLGLIRAMEK FDYTKGFKFS T YATWWIRQ ...String:
MGSSHHHHHH SSGLVPRGSH MADAPTRATT SRVDSDLDAQ SPAADLVRVY LNGIGKTALL NAAGEVELAK RIEAGLYAEH LLETRKRLG ENRKRDLAAV VRDGEAARRH LLEANLRLVV SLAKRYTGRG MPLLDLIQEG NLGLIRAMEK FDYTKGFKFS T YATWWIRQ AITRGMADQS RTIRLPVHLV EQVNKLARIK REMHQHLGRE ATDEELAAES GIPIDKINDL LEHSRDPVSL DM PVGSEEE APLGDFIEDA EAMSAENAVI AELLHTDIRS VLATLDEREH QVIRLRFGLD DGQPRTLDQI GKLFGLSRER VRQ IERDVM SKLRHGERAD RLRSYAS

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Macromolecule #6: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 6 / Number of copies: 4 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Macromolecule #7: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 7 / Number of copies: 2 / Formula: MG
Molecular weightTheoretical: 24.305 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

Concentration1.4 mg/mL
BufferpH: 7.9
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 7.0 µm / Nominal defocus min: 0.5 µm
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Number real images: 3064 / Average electron dose: 49.6 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 254380
Startup modelType of model: NONE / Details: ab-into reconstruction
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final 3D classificationSoftware - Name: cryoSPARC
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final reconstructionAlgorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 4.36 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 2.1) / Number images used: 115112
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

7pp4

RefinementSpace: REAL / Protocol: RIGID BODY FIT
Output model

PDB-7q59:
Cryo-EM structure of Mycobacterium tuberculosis RNA polymerase holoenzyme dimer comprising sigma factor SigB

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