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Yorodumi- EMDB-35439: Cryo-EM structure of RNAP-promoter open complex at lambda promoter PRE -
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Open data
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Basic information
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| Title | Cryo-EM structure of RNAP-promoter open complex at lambda promoter PRE | |||||||||
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Keywords | RNA polymerase / transcription / transcription activation / bacteriophage / CII | |||||||||
| Function / homology | Function and homology informationsigma factor antagonist complex / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly / bacterial-type RNA polymerase core enzyme binding / cytosolic DNA-directed RNA polymerase complex / bacterial-type flagellum-dependent cell motility ...sigma factor antagonist complex / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly / bacterial-type RNA polymerase core enzyme binding / 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 / protein-containing complex assembly / intracellular iron ion homeostasis / protein dimerization activity / response to antibiotic / negative regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / membrane / cytoplasm / cytosol Similarity search - Function | |||||||||
| Biological species | ![]() | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.4 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: 2023Title: 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. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_35439.map.gz | 31.3 MB | EMDB map data format | |
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| Header (meta data) | emd-35439-v30.xml emd-35439.xml | 23.8 KB 23.8 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_35439_fsc.xml | 7.9 KB | Display | FSC data file |
| Images | emd_35439.png | 152.8 KB | ||
| Others | emd_35439_half_map_1.map.gz emd_35439_half_map_2.map.gz | 31.3 MB 31.3 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-35439 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-35439 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8igsMC ![]() 8igrC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_35439.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 | ||||||||||||||||||||||||||||||||||||
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Half map: #2
| File | emd_35439_half_map_1.map | ||||||||||||
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| Density Histograms |
-Half map: #1
| File | emd_35439_half_map_2.map | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : RNAP-promoter open complex
+Supramolecule #1: RNAP-promoter open 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: non-template strand DNA
+Macromolecule #7: template strand DNA
+Macromolecule #8: MAGNESIUM ION
+Macromolecule #9: ZINC ION
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.5 |
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| Vitrification | Cryogen name: ETHANE |
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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 |
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About Yorodumi



Keywords
Authors
China, 1 items
Citation




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Processing
FIELD EMISSION GUN


