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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-22039 | |||||||||
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Title | Mfd-bound E.coli RNA polymerase elongation complex - II state | |||||||||
![]() | cryo-EM map, sharpened | |||||||||
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![]() | Transcription-coupled DNA repair / DNA translocase / elongation complex / RNA polymerase / TRANSCRIPTION | |||||||||
Function / homology | ![]() transcription-coupled nucleotide-excision repair, DNA damage recognition / RNA polymerase core enzyme binding / DNA translocase activity / nucleotide-excision repair, preincision complex assembly / DNA repair complex / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation ...transcription-coupled nucleotide-excision repair, DNA damage recognition / RNA polymerase core enzyme binding / DNA translocase activity / nucleotide-excision repair, preincision complex assembly / DNA repair complex / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation / bacterial-type flagellum assembly / bacterial-type flagellum-dependent cell motility / transcription-coupled nucleotide-excision repair / nitrate assimilation / DNA-directed RNA polymerase complex / DNA helicase activity / transcription elongation factor complex / regulation of DNA-templated transcription elongation / transcription antitermination / DNA-templated transcription initiation / cell motility / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / response to heat / protein-containing complex assembly / intracellular iron ion homeostasis / damaged DNA binding / protein dimerization activity / hydrolase activity / response to antibiotic / DNA repair / DNA-templated transcription / DNA damage response / regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / ATP binding / membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.6 Å | |||||||||
![]() | Llewellyn E / Chen J | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis for transcription complex disruption by the Mfd translocase. Authors: Jin Young Kang / Eliza Llewellyn / James Chen / Paul Dominic B Olinares / Joshua Brewer / Brian T Chait / Elizabeth A Campbell / Seth A Darst / ![]() Abstract: Transcription-coupled repair (TCR) is a sub-pathway of nucleotide excision repair (NER) that preferentially removes lesions from the template-strand (t-strand) that stall RNA polymerase (RNAP) ...Transcription-coupled repair (TCR) is a sub-pathway of nucleotide excision repair (NER) that preferentially removes lesions from the template-strand (t-strand) that stall RNA polymerase (RNAP) elongation complexes (ECs). Mfd mediates TCR in bacteria by removing the stalled RNAP concealing the lesion and recruiting Uvr(A)BC. We used cryo-electron microscopy to visualize Mfd engaging with a stalled EC and attempting to dislodge the RNAP. We visualized seven distinct Mfd-EC complexes in both ATP and ADP-bound states. The structures explain how Mfd is remodeled from its repressed conformation, how the UvrA-interacting surface of Mfd is hidden during most of the remodeling process to prevent premature engagement with the NER pathway, how Mfd alters the RNAP conformation to facilitate disassembly, and how Mfd forms a processive translocation complex after dislodging the RNAP. Our results reveal an elaborate mechanism for how Mfd kinetically discriminates paused from stalled ECs and disassembles stalled ECs to initiate TCR. | |||||||||
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 | ![]() | 96.5 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 25.3 KB 25.3 KB | Display Display | ![]() |
Images | ![]() | 149.4 KB | ||
Filedesc metadata | ![]() | 9.1 KB | ||
Others | ![]() | 4.2 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6x43MC ![]() 6x26C ![]() 6x2fC ![]() 6x2nC ![]() 6x4wC ![]() 6x4yC ![]() 6x50C C: citing same article ( M: atomic model generated by this map |
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Similar structure data |
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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 | cryo-EM map, sharpened | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.3 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Additional map: Cryo-EM map, local resolution filtered
File | emd_22039_additional_1.map | ||||||||||||
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Annotation | Cryo-EM map, local resolution filtered | ||||||||||||
Projections & Slices |
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Density Histograms |
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Sample components
+Entire : Escherichia coli Mfd-RNA polymerase elongation complex: state II
+Supramolecule #1: Escherichia coli Mfd-RNA polymerase elongation complex: state II
+Macromolecule #1: Transcription-repair-coupling factor
+Macromolecule #2: DNA-directed RNA polymerase subunit alpha
+Macromolecule #3: DNA-directed RNA polymerase subunit beta
+Macromolecule #4: DNA-directed RNA polymerase subunit beta'
+Macromolecule #5: DNA-directed RNA polymerase subunit omega
+Macromolecule #6: RNA (20-mer)
+Macromolecule #7: DNA (64-MER)
+Macromolecule #8: DNA (64-MER)
+Macromolecule #9: ADENOSINE-5'-TRIPHOSPHATE
+Macromolecule #10: MAGNESIUM ION
+Macromolecule #11: ZINC ION
-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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Vitrification | Cryogen name: ETHANE |
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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) / Average electron dose: 60.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: OTHER |
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Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 86000 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |