+ Open data
Open data
- Basic information
Basic information
| Entry | Database: EMDB / ID: EMD-22184 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Title | CueR-TAC without RNA | |||||||||
|  Map data | CueR-TAC-nonNTP | |||||||||
|  Sample | 
 | |||||||||
|  Keywords | transcription activation / RNA polymerase / MerR-family / TRANSCRIPTION / TRANSCRIPTION-DNA complex | |||||||||
| Function / homology |  Function and homology information sigma factor antagonist complex / DNA-binding transcription activator activity / regulation of DNA-templated transcription initiation / sigma factor activity / cytosolic DNA-directed RNA polymerase complex / cis-regulatory region sequence-specific DNA binding / DNA-directed RNA polymerase complex / DNA-templated transcription initiation / protein-DNA complex / ribonucleoside binding ...sigma factor antagonist complex / DNA-binding transcription activator activity / regulation of DNA-templated transcription initiation / sigma factor activity / cytosolic DNA-directed RNA polymerase complex / cis-regulatory region sequence-specific DNA binding / DNA-directed RNA polymerase complex / DNA-templated transcription initiation / protein-DNA complex / ribonucleoside binding / DNA-directed RNA polymerase / DNA-directed RNA polymerase activity / response to heat / transcription cis-regulatory region binding / protein dimerization activity / DNA-binding transcription factor activity / copper ion binding / negative regulation of DNA-templated transcription / DNA-templated transcription / positive regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / identical protein binding / cytoplasm / cytosol Similarity search - Function | |||||||||
| Biological species |   Escherichia coli (E. coli) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.9 Å | |||||||||
|  Authors | Liu B / Shi W | |||||||||
|  Citation |  Journal: iScience / Year: 2021 Title: Structural basis of copper-efflux-regulator-dependent transcription activation. Authors: Wei Shi / Baoyue Zhang / Yanan Jiang / Chang Liu / Wei Zhou / Ming Chen / Yang Yang / Yangbo Hu / Bin Liu /    Abstract: The copper efflux regulator (CueR), a representative member of mercury resistance regulator (MerR) family metalloregulators, controls expression of copper homeostasis-regulating genes in bacteria. ...The copper efflux regulator (CueR), a representative member of mercury resistance regulator (MerR) family metalloregulators, controls expression of copper homeostasis-regulating genes in bacteria. The mechanism of transcription activation by CueR and other MerR family regulators is bending the spacer domain of promoter DNA. Here, we report the cryo-EM structures of the intact CueR-dependent transcription activation complexes. The structures show that CueR dimer bends the 19-bp promoter spacer to realign the -35 and -10 elements for recognition by σ-RNA polymerase holoenzyme and reveal a previously unreported interaction between the DNA-binding domain (DBD) from one CueR subunit and the σ nonconserved region (σNCR). Functional studies have shown that the CueR-σNCR interaction plays an auxiliary role in CueR-dependent transcription, assisting the activation mechanism of bending promoter DNA by CueR dimer. Because DBDs are highly conserved in sequence and structure, this transcription-activating mechanism could be generally used by MerR family regulators. | |||||||||
| History | 
 | 
- Structure visualization
Structure visualization
| Movie | 
 
 
  Movie viewer | 
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| Structure viewer | EM map:  SurfView  Molmil  Jmol/JSmol | 
| Supplemental images | 
- Downloads & links
Downloads & links
-EMDB archive
| Map data |  emd_22184.map.gz | 171.4 MB |  EMDB map data format | |
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| Header (meta data) |  emd-22184-v30.xml  emd-22184.xml | 23.9 KB 23.9 KB | Display Display |  EMDB header | 
| Images |  emd_22184.png | 70.3 KB | ||
| Filedesc metadata |  emd-22184.cif.gz | 8.6 KB | ||
| Archive directory |  http://ftp.pdbj.org/pub/emdb/structures/EMD-22184  ftp://ftp.pdbj.org/pub/emdb/structures/EMD-22184 | HTTPS FTP | 
-Validation report
| Summary document |  emd_22184_validation.pdf.gz | 581.9 KB | Display |  EMDB validaton report | 
|---|---|---|---|---|
| Full document |  emd_22184_full_validation.pdf.gz | 581.5 KB | Display | |
| Data in XML |  emd_22184_validation.xml.gz | 7 KB | Display | |
| Data in CIF |  emd_22184_validation.cif.gz | 8 KB | Display | |
| Arichive directory |  https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-22184  ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-22184 | HTTPS FTP | 
-Related structure data
| Related structure data |  6xh7MC  6xh8C C: citing same article ( M: atomic model generated by this map | 
|---|---|
| Similar structure data | 
- Links
Links
| EMDB pages |  EMDB (EBI/PDBe) /  EMDataResource | 
|---|---|
| Related items in Molecule of the Month | 
- Map
Map
| File |  Download / File: emd_22184.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Annotation | CueR-TAC-nonNTP | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
 
 Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 0.89 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Density | 
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Details | EMDB XML: 
 CCP4 map header: 
 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
-Supplemental data
- Sample components
Sample components
+Entire : CueR-TAC without RNA
+Supramolecule #1: CueR-TAC without RNA
+Macromolecule #1: DNA-directed RNA polymerase subunit alpha
+Macromolecule #2: DNA-directed RNA polymerase subunit beta
+Macromolecule #3: DNA-directed RNA polymerase subunit beta'
+Macromolecule #4: DNA-directed RNA polymerase subunit omega
+Macromolecule #5: RNA polymerase sigma factor RpoD
+Macromolecule #6: HTH-type transcriptional regulator CueR
+Macromolecule #7: NONTEMPLATE STRAND DNA (54-MER)
+Macromolecule #8: TEMPLATE STRAND DNA (54-MER)
+Macromolecule #9: ZINC ION
+Macromolecule #10: COPPER (II) ION
-Experimental details
-Structure determination
| Method | cryo EM | 
|---|---|
|  Processing | single particle reconstruction | 
| Aggregation state | particle | 
- Sample preparation
Sample preparation
| Concentration | 0.5 mg/mL | 
|---|---|
| Buffer | pH: 7.5 | 
| Grid | Model: Quantifoil R2/2 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. | 
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV | 
- Electron microscopy
Electron microscopy
| Microscope | FEI TITAN KRIOS | 
|---|---|
| Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Number real images: 4611 / Average exposure time: 30.0 sec. / Average electron dose: 30.0 e/Å2 | 
| Electron beam | Acceleration voltage: 300 kV / Electron source:  FIELD EMISSION GUN | 
| Electron optics | C2 aperture diameter: 100.0 µm / Calibrated defocus max: 2.4 µm / Calibrated defocus min: 1.0 µm / Calibrated magnification: 96000 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.4 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 96000 | 
| Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN | 
| Experimental equipment |  Model: Titan Krios / Image courtesy: FEI Company | 
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