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Yorodumi- EMDB-29649: Cryo-EM structure of SQ31f-bound Mycobacterium smegmatis ATP synt... -
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Basic information
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| Title | Cryo-EM structure of SQ31f-bound Mycobacterium smegmatis ATP synthase rotational state 1 | |||||||||
Map data | Cryo-EM structure of SQ31f-bound Mycobacterium smegmatis ATP synthase rotational state 1 (unsharpened) | |||||||||
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Keywords | ATP synthase / mycobacterial / inhibitor / tuberculosis / antibiotic / HYDROLASE / TRANSLOCASE-INHIBITOR complex | |||||||||
| Function / homology | Function and homology informationproton motive force-driven plasma membrane ATP synthesis / proton-transporting two-sector ATPase complex, proton-transporting domain / proton-transporting ATPase activity, rotational mechanism / H+-transporting two-sector ATPase / proton-transporting ATP synthase complex / proton-transporting ATP synthase activity, rotational mechanism / ADP binding / hydrolase activity / lipid binding / ATP hydrolysis activity ...proton motive force-driven plasma membrane ATP synthesis / proton-transporting two-sector ATPase complex, proton-transporting domain / proton-transporting ATPase activity, rotational mechanism / H+-transporting two-sector ATPase / proton-transporting ATP synthase complex / proton-transporting ATP synthase activity, rotational mechanism / ADP binding / hydrolase activity / lipid binding / ATP hydrolysis activity / ATP binding / plasma membrane Similarity search - Function | |||||||||
| Biological species | Mycolicibacterium smegmatis MC2 155 (bacteria) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 2.8 Å | |||||||||
Authors | Courbon GM / Rubinstein JL | |||||||||
| Funding support | Canada, 1 items
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Citation | Journal: EMBO J / Year: 2023Title: Mechanism of mycobacterial ATP synthase inhibition by squaramides and second generation diarylquinolines. Authors: Gautier M Courbon / Paul R Palme / Lea Mann / Adrian Richter / Peter Imming / John L Rubinstein / ![]() Abstract: Mycobacteria, such as Mycobacterium tuberculosis, depend on the activity of adenosine triphosphate (ATP) synthase for growth. The diarylquinoline bedaquiline (BDQ), a mycobacterial ATP synthase ...Mycobacteria, such as Mycobacterium tuberculosis, depend on the activity of adenosine triphosphate (ATP) synthase for growth. The diarylquinoline bedaquiline (BDQ), a mycobacterial ATP synthase inhibitor, is an important medication for treatment of drug-resistant tuberculosis but suffers from off-target effects and is susceptible to resistance mutations. Consequently, both new and improved mycobacterial ATP synthase inhibitors are needed. We used electron cryomicroscopy and biochemical assays to study the interaction of Mycobacterium smegmatis ATP synthase with the second generation diarylquinoline TBAJ-876 and the squaramide inhibitor SQ31f. The aryl groups of TBAJ-876 improve binding compared with BDQ, while SQ31f, which blocks ATP synthesis ~10 times more potently than ATP hydrolysis, binds a previously unknown site in the enzyme's proton-conducting channel. Remarkably, BDQ, TBAJ-876, and SQ31f all induce similar conformational changes in ATP synthase, suggesting that the resulting conformation is particularly suited for drug binding. Further, high concentrations of the diarylquinolines uncouple the transmembrane proton motive force while for SQ31f they do not, which may explain why high concentrations of diarylquinolines, but not SQ31f, have been reported to kill mycobacteria. | |||||||||
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Structure visualization
| Supplemental images |
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Downloads & links
-EMDB archive
| Map data | emd_29649.map.gz | 62.9 MB | EMDB map data format | |
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| Header (meta data) | emd-29649-v30.xml emd-29649.xml | 26.9 KB 26.9 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_29649_fsc.xml | 10.5 KB | Display | FSC data file |
| Images | emd_29649.png | 70.5 KB | ||
| Filedesc metadata | emd-29649.cif.gz | 7.3 KB | ||
| Others | emd_29649_additional_1.map.gz emd_29649_half_map_1.map.gz emd_29649_half_map_2.map.gz | 57.1 MB 116 MB 116 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-29649 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-29649 | HTTPS FTP |
-Validation report
| Summary document | emd_29649_validation.pdf.gz | 895.7 KB | Display | EMDB validaton report |
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| Full document | emd_29649_full_validation.pdf.gz | 895.2 KB | Display | |
| Data in XML | emd_29649_validation.xml.gz | 18.9 KB | Display | |
| Data in CIF | emd_29649_validation.cif.gz | 24.2 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-29649 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-29649 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8g08MC ![]() 8g07C ![]() 8g09C ![]() 8g0aC ![]() 8g0bC ![]() 8g0cC ![]() 8g0dC ![]() 8g0eC C: citing same article ( M: atomic model generated by this map |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_29649.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | Cryo-EM structure of SQ31f-bound Mycobacterium smegmatis ATP synthase rotational state 1 (unsharpened) | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.03 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Additional map: Cryo-EM structure of SQ31f-bound Mycobacterium smegmatis ATP synthase...
| File | emd_29649_additional_1.map | ||||||||||||
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| Annotation | Cryo-EM structure of SQ31f-bound Mycobacterium smegmatis ATP synthase rotational state 1 (locally sharpened) | ||||||||||||
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| Density Histograms |
-Half map: Cryo-EM structure of SQ31f-bound Mycobacterium smegmatis ATP synthase...
| File | emd_29649_half_map_1.map | ||||||||||||
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| Annotation | Cryo-EM structure of SQ31f-bound Mycobacterium smegmatis ATP synthase rotational state 1 (Half B) | ||||||||||||
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| Density Histograms |
-Half map: Cryo-EM structure of SQ31f-bound Mycobacterium smegmatis ATP synthase...
| File | emd_29649_half_map_2.map | ||||||||||||
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| Annotation | Cryo-EM structure of SQ31f-bound Mycobacterium smegmatis ATP synthase rotational state 1 (Half A) | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : SQ31f-bound Mycobacterium smegmatis ATP synthase rotational state 1
+Supramolecule #1: SQ31f-bound Mycobacterium smegmatis ATP synthase rotational state 1
+Macromolecule #1: ATP synthase subunit c
+Macromolecule #2: ATP synthase subunit alpha
+Macromolecule #3: ATP synthase subunit beta
+Macromolecule #4: ATP synthase gamma chain
+Macromolecule #5: ATP synthase epsilon chain
+Macromolecule #6: ATP synthase subunit b
+Macromolecule #7: ATP synthase subunit b-delta
+Macromolecule #8: ATP synthase subunit a
+Macromolecule #9: 3-[4-(morpholin-4-yl)phenyl]-4-{[(pyridin-2-yl)methyl]amino}cyclo...
+Macromolecule #10: ADENOSINE-5'-TRIPHOSPHATE
+Macromolecule #11: MAGNESIUM ION
+Macromolecule #12: PHOSPHATE ION
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.4 |
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| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | TFS KRIOS |
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| Image recording | Film or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 54.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.9 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi



Keywords
Mycolicibacterium smegmatis MC2 155 (bacteria)
Authors
Canada, 1 items
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Processing
FIELD EMISSION GUN

