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- EMDB-9047: Mycobacterium tuberculosis RNAP with RbpA/us fork and Corallopyronin -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-9047 | |||||||||
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Title | Mycobacterium tuberculosis RNAP with RbpA/us fork and Corallopyronin | |||||||||
![]() | primary map | |||||||||
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![]() | initiation / transcription bubble / closed clamp / open promoter complex / TRANSCRIPTION / TRANSCRIPTION-DNA 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: 4.4 Å | |||||||||
![]() | Darst SA / Campbell EA | |||||||||
![]() | ![]() Title: Structures of an RNA polymerase promoter melting intermediate elucidate DNA unwinding. Authors: Hande Boyaci / James Chen / Rolf Jansen / Seth A Darst / Elizabeth A Campbell / ![]() ![]() Abstract: A key regulated step of transcription is promoter melting by RNA polymerase (RNAP) to form the open promoter complex. To generate the open complex, the conserved catalytic core of the RNAP combines ...A key regulated step of transcription is promoter melting by RNA polymerase (RNAP) to form the open promoter complex. To generate the open complex, the conserved catalytic core of the RNAP combines with initiation factors to locate promoter DNA, unwind 12-14 base pairs of the DNA duplex and load the template-strand DNA into the RNAP active site. Formation of the open complex is a multi-step process during which transient intermediates of unknown structure are formed. Here we present cryo-electron microscopy structures of bacterial RNAP-promoter DNA complexes, including structures of partially melted intermediates. The structures show that late steps of promoter melting occur within the RNAP cleft, delineate key roles for fork-loop 2 and switch 2-universal structural features of RNAP-in restricting access of DNA to the RNAP active site, and explain why clamp opening is required to allow entry of single-stranded template DNA into the active site. The key roles of fork-loop 2 and switch 2 suggest a common mechanism for late steps in promoter DNA opening to enable gene expression across all domains of life. | |||||||||
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 | ![]() | 59.3 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 25.7 KB 25.7 KB | Display Display | ![]() |
Images | ![]() | 102.7 KB | ||
Filedesc metadata | ![]() | 9.3 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6m7jMC ![]() 9037C ![]() 9039C ![]() 9041C ![]() 6edtC ![]() 6ee8C ![]() 6eecC 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 | primary map | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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
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Sample components
+Entire : Mycobacterium tuberculosis RNAP open promoter complex
+Supramolecule #1: Mycobacterium tuberculosis RNAP open promoter 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 SigA
+Macromolecule #6: RNA polymerase-binding protein RbpA
+Macromolecule #7: DNA (31-MER)
+Macromolecule #8: DNA (26-MER)
+Macromolecule #9: ZINC ION
+Macromolecule #10: MAGNESIUM ION
+Macromolecule #11: methyl [(1E,5R)-5-{(3E)-3-[(2E,4E,8R,9E,12E)-1,8-dihydroxy-2,5,9-...
-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 | Details: unspecified |
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: 69.9 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 |