+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-23210 | |||||||||
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Title | Clostridioides difficile RNAP with fidaxomicin | |||||||||
Map data | ||||||||||
Sample |
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Keywords | fidaxomicin / Clostridioides difficile RNA polymerase / TRANSCRIPTION / TRANSCRIPTION-INHIBITOR complex | |||||||||
Function / homology | Function and homology information DNA-templated transcription initiation => GO:0006352 / sigma factor activity / DNA-directed RNA polymerase complex / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / protein dimerization activity / DNA-templated transcription / magnesium ion binding / DNA binding ...DNA-templated transcription initiation => GO:0006352 / sigma factor activity / DNA-directed RNA polymerase complex / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / protein dimerization activity / DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / cytoplasm Similarity search - Function | |||||||||
Biological species | Clostridia bacterium (bacteria) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.26 Å | |||||||||
Authors | Boyaci H / Campbell EA | |||||||||
Funding support | 1 items
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Citation | Journal: Nature / Year: 2022 Title: Basis of narrow-spectrum activity of fidaxomicin on Clostridioides difficile. Authors: Xinyun Cao / Hande Boyaci / James Chen / Yu Bao / Robert Landick / Elizabeth A Campbell / Abstract: Fidaxomicin (Fdx) is widely used to treat Clostridioides difficile (Cdiff) infections, but the molecular basis of its narrow-spectrum activity in the human gut microbiome remains unknown. Cdiff ...Fidaxomicin (Fdx) is widely used to treat Clostridioides difficile (Cdiff) infections, but the molecular basis of its narrow-spectrum activity in the human gut microbiome remains unknown. Cdiff infections are a leading cause of nosocomial deaths. Fidaxomicin, which inhibits RNA polymerase, targets Cdiff with minimal effects on gut commensals, reducing recurrence of Cdiff infection. Here we present the cryo-electron microscopy structure of Cdiff RNA polymerase in complex with fidaxomicin and identify a crucial fidaxomicin-binding determinant of Cdiff RNA polymerase that is absent in most gut microbiota such as Proteobacteria and Bacteroidetes. By combining structural, biochemical, genetic and bioinformatic analyses, we establish that a single residue in Cdiff RNA polymerase is a sensitizing element for fidaxomicin narrow-spectrum activity. Our results provide a blueprint for targeted drug design against an important human pathogen. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_23210.map.gz | 59.7 MB | EMDB map data format | |
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Header (meta data) | emd-23210-v30.xml emd-23210.xml | 17.7 KB 17.7 KB | Display Display | EMDB header |
Images | emd_23210.png | 164.6 KB | ||
Filedesc metadata | emd-23210.cif.gz | 7.5 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-23210 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-23210 | HTTPS FTP |
-Validation report
Summary document | emd_23210_validation.pdf.gz | 510.1 KB | Display | EMDB validaton report |
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Full document | emd_23210_full_validation.pdf.gz | 509.7 KB | Display | |
Data in XML | emd_23210_validation.xml.gz | 6.3 KB | Display | |
Data in CIF | emd_23210_validation.cif.gz | 7.2 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-23210 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-23210 | HTTPS FTP |
-Related structure data
Related structure data | 7l7bMC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_23210.map.gz / Format: CCP4 / Size: 64 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: 1.083 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
+Entire : Clostridioides difficile RNA polymerase in complex with fidaxomicin
+Supramolecule #1: Clostridioides difficile RNA polymerase in complex with fidaxomicin
+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 SigA
+Macromolecule #6: ZINC ION
+Macromolecule #7: MAGNESIUM ION
+Macromolecule #8: Fidaxomicin
+Macromolecule #9: water
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 8 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 51.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: INSILICO MODEL |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.26 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 182390 |
Initial angle assignment | Type: PROJECTION MATCHING |
Final angle assignment | Type: PROJECTION MATCHING |