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- EMDB-44439: Cryo-EM structure of Thermococcus kodakarensis FttA-dependent tra... -
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Open data
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Basic information
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Title | Cryo-EM structure of Thermococcus kodakarensis FttA-dependent transcription pre-termination complex containing 52 nt RNA | |||||||||
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![]() | RNA polymerase / pre-termination complex / FttA / archaea / TRANSCRIPTION | |||||||||
Function / homology | ![]() exonuclease activity / transcription elongation-coupled chromatin remodeling / translation elongation factor activity / DNA-directed RNA polymerase activity / RNA endonuclease activity / DNA-directed RNA polymerase complex / regulation of DNA-templated transcription elongation / DNA-templated transcription initiation / DNA-templated transcription termination / ribonucleoside binding ...exonuclease activity / transcription elongation-coupled chromatin remodeling / translation elongation factor activity / DNA-directed RNA polymerase activity / RNA endonuclease activity / DNA-directed RNA polymerase complex / regulation of DNA-templated transcription elongation / DNA-templated transcription initiation / DNA-templated transcription termination / ribonucleoside binding / : / : / : / : / : / : / DNA-directed RNA polymerase / chromosome / Hydrolases; Acting on ester bonds / protein dimerization activity / regulation of DNA-templated transcription / regulation of transcription by RNA polymerase II / magnesium ion binding / DNA binding / RNA binding / zinc ion binding / metal ion binding / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.2 Å | |||||||||
![]() | You L / Ebright RH | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis of archaeal FttA-dependent transcription termination. Authors: Linlin You / Chengyuan Wang / Vadim Molodtsov / Konstantin Kuznedelov / Xinyi Miao / Breanna R Wenck / Paul Ulisse / Travis J Sanders / Craig J Marshall / Emre Firlar / Jason T Kaelber / ...Authors: Linlin You / Chengyuan Wang / Vadim Molodtsov / Konstantin Kuznedelov / Xinyi Miao / Breanna R Wenck / Paul Ulisse / Travis J Sanders / Craig J Marshall / Emre Firlar / Jason T Kaelber / Thomas J Santangelo / Richard H Ebright / ![]() ![]() ![]() Abstract: The ribonuclease FttA (also known as aCPSF and aCPSF1) mediates factor-dependent transcription termination in archaea. Here we report the structure of a Thermococcus kodakarensis transcription pre- ...The ribonuclease FttA (also known as aCPSF and aCPSF1) mediates factor-dependent transcription termination in archaea. Here we report the structure of a Thermococcus kodakarensis transcription pre-termination complex comprising FttA, Spt4, Spt5 and a transcription elongation complex (TEC). The structure shows that FttA interacts with the TEC in a manner that enables RNA to proceed directly from the TEC RNA-exit channel to the FttA catalytic centre and that enables endonucleolytic cleavage of RNA by FttA, followed by 5'→3' exonucleolytic cleavage of RNA by FttA and concomitant 5'→3' translocation of FttA on RNA, to apply mechanical force to the TEC and trigger termination. The structure further reveals that Spt5 bridges FttA and the TEC, explaining how Spt5 stimulates FttA-dependent termination. The results reveal functional analogy between bacterial and archaeal factor-dependent termination, functional homology between archaeal and eukaryotic factor-dependent termination, and fundamental mechanistic similarities in factor-dependent termination in bacteria, archaea, and eukaryotes. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
Map data | ![]() | 168.5 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 31.6 KB 31.6 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 14.9 KB | Display | ![]() |
Images | ![]() | 157.9 KB | ||
Filedesc metadata | ![]() | 9.8 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 9bcuMC ![]() 9bctC C: citing same article ( M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homology ![]() |
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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 | composite map | ||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.73 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : FttA-dependent transcription termination complex containing 52 nt RNA
+Supramolecule #1: FttA-dependent transcription termination complex containing 52 nt RNA
+Macromolecule #1: DNA-directed RNA polymerase subunit A'
+Macromolecule #2: DNA-directed RNA polymerase subunit B
+Macromolecule #3: DNA-directed RNA polymerase subunit A"
+Macromolecule #4: DNA-directed RNA polymerase subunit D
+Macromolecule #5: DNA-directed RNA polymerase subunit E
+Macromolecule #6: DNA-directed RNA polymerase subunit F
+Macromolecule #7: DNA-directed RNA polymerase subunit H
+Macromolecule #8: DNA-directed RNA polymerase subunit K
+Macromolecule #9: DNA-directed RNA polymerase subunit L
+Macromolecule #10: DNA-directed RNA polymerase subunit N
+Macromolecule #11: DNA-directed RNA polymerase subunit P
+Macromolecule #12: Transcription elongation factor Spt5
+Macromolecule #13: Transcription elongation factor Spt4
+Macromolecule #14: Transcription termination factor FttA
+Macromolecule #15: non-template strand DNA
+Macromolecule #16: template strand DNA
+Macromolecule #17: RNA (29-MER)
+Macromolecule #18: MAGNESIUM ION
+Macromolecule #19: 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
Concentration | 4.5 mg/mL |
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Buffer | pH: 7.5 |
Grid | Model: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 300 sec. / Pretreatment - Atmosphere: AIR |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 295 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Specialist optics | Energy filter - Slit width: 20 eV |
Image recording | Film or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 48.33 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.6 µm / Nominal magnification: 165000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |