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Yorodumi- EMDB-35438: Cryo-EM structure of CII-dependent transcription activation complex -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-35438 | |||||||||
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Title | Cryo-EM structure of CII-dependent transcription activation complex | |||||||||
Map data | ||||||||||
Sample |
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Keywords | RNA polymerase / transcription / transcription activation / bacteriophage / CII | |||||||||
Function / homology | Function and homology information viral latency / sigma factor antagonist complex / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / bacterial-type RNA polymerase core enzyme binding / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly ...viral latency / sigma factor antagonist complex / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / bacterial-type RNA polymerase core enzyme binding / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly / bacterial-type flagellum-dependent cell motility / nitrate assimilation / transcription elongation factor complex / regulation of DNA-templated transcription elongation / DNA-templated transcription initiation / transcription antitermination / cell motility / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / response to heat / protein-containing complex assembly / intracellular iron ion homeostasis / protein dimerization activity / response to antibiotic / negative regulation of DNA-templated transcription / regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | Escherichia coli (E. coli) / Escherichia coli (strain K12) (bacteria) / Escherichia phage Lambda (virus) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||
Authors | Zhao M / Gao B / Wen A / Feng Y / Lu Y | |||||||||
Funding support | China, 1 items
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Citation | Journal: Structure / Year: 2023 Title: Structural basis of λCII-dependent transcription activation. Authors: Minxing Zhao / Bo Gao / Aijia Wen / Yu Feng / Yuan-Qiang Lu / Abstract: The CII protein of bacteriophage λ activates transcription from the phage promoters P, P, and P by binding to two direct repeats that straddle the promoter -35 element. Although genetic, ...The CII protein of bacteriophage λ activates transcription from the phage promoters P, P, and P by binding to two direct repeats that straddle the promoter -35 element. Although genetic, biochemical, and structural studies have elucidated many aspects of λCII-mediated transcription activation, no precise structure of the transcription machinery in the process is available. Here, we report a 3.1-Å cryo-electron microscopy (cryo-EM) structure of an intact λCII-dependent transcription activation complex (TAC-λCII), which comprises λCII, E. coli RNAP-σ holoenzyme, and the phage promoter P. The structure reveals the interactions between λCII and the direct repeats responsible for promoter specificity and the interactions between λCII and RNAP α subunit C-terminal domain responsible for transcription activation. We also determined a 3.4-Å cryo-EM structure of an RNAP-promoter open complex (RPo-P) from the same dataset. Structural comparison between TAC-λCII and RPo-P provides new insights into λCII-dependent transcription activation. | |||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_35438.map.gz | 31.3 MB | EMDB map data format | |
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Header (meta data) | emd-35438-v30.xml emd-35438.xml | 25 KB 25 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_35438_fsc.xml | 7.8 KB | Display | FSC data file |
Images | emd_35438.png | 177.7 KB | ||
Others | emd_35438_half_map_1.map.gz emd_35438_half_map_2.map.gz | 31.3 MB 31.3 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-35438 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-35438 | HTTPS FTP |
-Validation report
Summary document | emd_35438_validation.pdf.gz | 966.1 KB | Display | EMDB validaton report |
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Full document | emd_35438_full_validation.pdf.gz | 965.6 KB | Display | |
Data in XML | emd_35438_validation.xml.gz | 13.5 KB | Display | |
Data in CIF | emd_35438_validation.cif.gz | 19.2 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-35438 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-35438 | HTTPS FTP |
-Related structure data
Related structure data | 8igrMC 8igsC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_35438.map.gz / Format: CCP4 / Size: 40.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.19 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
File | emd_35438_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_35438_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
+Entire : CII-dependent transcription activation complex
+Supramolecule #1: CII-dependent transcription activation complex
+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: Transcriptional activator II
+Macromolecule #7: nontemplate strand DNA
+Macromolecule #8: template strand DNA
+Macromolecule #9: MAGNESIUM ION
+Macromolecule #10: ZINC ION
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 51.7 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.7 µm / Nominal defocus min: 0.8 µm |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |