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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-7319 | |||||||||
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Title | Mtb RNAP Holo/RbpA/Fidaxomicin/upstream fork DNA | |||||||||
![]() | primary map | |||||||||
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![]() | RNA Polymerase / Antibiotic / Inhibitor / TRANSCRIPTION / transcription-dna-antibiotic complex | |||||||||
Function / homology | ![]() response to water / bacterial-type RNA polymerase holo enzyme binding / Antimicrobial action and antimicrobial resistance in Mtb / sigma factor activity / bacterial-type RNA polymerase core enzyme binding / cytosolic DNA-directed RNA polymerase complex / DNA-directed RNA polymerase complex / peptidoglycan-based cell wall / DNA-templated transcription initiation / ribonucleoside binding ...response to water / bacterial-type RNA polymerase holo enzyme binding / Antimicrobial action and antimicrobial resistance in Mtb / sigma factor activity / bacterial-type RNA polymerase core enzyme binding / cytosolic DNA-directed RNA polymerase complex / DNA-directed RNA polymerase complex / peptidoglycan-based cell wall / DNA-templated transcription initiation / ribonucleoside binding / : / : / : / : / : / : / DNA-directed RNA polymerase / nucleic acid binding / protein dimerization activity / response to antibiotic / positive regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / plasma membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.38 Å | |||||||||
![]() | Darst SA / Campbell EA | |||||||||
![]() | ![]() Title: Fidaxomicin jams RNA polymerase motions needed for initiation via RbpA contacts. Authors: Hande Boyaci / James Chen / Mirjana Lilic / Margaret Palka / Rachel Anne Mooney / Robert Landick / Seth A Darst / Elizabeth A Campbell / ![]() Abstract: Fidaxomicin (Fdx) is an antimicrobial RNA polymerase (RNAP) inhibitor highly effective against RNAP in vitro, but clinical use of Fdx is limited to treating intestinal infections due to poor ...Fidaxomicin (Fdx) is an antimicrobial RNA polymerase (RNAP) inhibitor highly effective against RNAP in vitro, but clinical use of Fdx is limited to treating intestinal infections due to poor absorption. To identify the structural determinants of Fdx binding to RNAP, we determined the 3.4 Å cryo-electron microscopy structure of a complete RNAP holoenzyme in complex with Fdx. We find that the actinobacteria general transcription factor RbpA contacts fidaxomycin, explaining its strong effect on . Additional structures define conformational states of RNAP between the free apo-holoenzyme and the promoter-engaged open complex ready for transcription. The results establish that Fdx acts like a doorstop to jam the enzyme in an open state, preventing the motions necessary to secure promoter DNA in the active site. Our results provide a structural platform to guide development of anti-tuberculosis antimicrobials based on the Fdx binding pocket. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 96.6 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 25.9 KB 25.9 KB | Display Display | ![]() |
Images | ![]() | 130.1 KB | ||
Filedesc metadata | ![]() | 9 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6bzoMC ![]() 7320C ![]() 7322C ![]() 7323C ![]() 6c04C ![]() 6c05C ![]() 6c06C C: citing same article ( M: atomic model generated by this map |
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Similar structure data | |
EM raw data | ![]() Data size: 220.5 Data #1: Unaligned multi frame micrographs of M. tuberculosis RNAP/RbpA holoenzyme with Fdx [micrographs - multiframe]) ![]() Data size: 838.9 Data #1: Unaligned multi-frame micrographs of M.tuberculosis RNAP holoenzyme with RbpA [micrographs - multiframe]) ![]() Data size: 2.0 TB Data #1: Unaligned multiframe micrographs of M.tuberculosis RNAP holoenzyme with RbpA and inhibitor Fdx and upstream fork DNA [micrographs - multiframe] Data #2: Unaligned multiframe micrographs of M.tuberculosis RNAP holoenzyme with RbpA and inhibitor Fdx and upstream fork DNA [micrographs - multiframe]) |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | primary map | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.1 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
+Entire : Complex of Mtb RNAP with an antibiotic called fidaxomicin
+Supramolecule #1: Complex of Mtb RNAP with an antibiotic called 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: RNA polymerase-binding protein RbpA
+Macromolecule #7: DNA (32-MER)
+Macromolecule #8: DNA (26-MER)
+Macromolecule #9: Fidaxomicin
+Macromolecule #10: ZINC ION
+Macromolecule #11: MAGNESIUM ION
+Macromolecule #12: water
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 8 |
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Grid | Model: C-flat / Material: GOLD / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 20 sec. |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 6.7 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 100.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.8 µm |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |