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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-23671 | |||||||||
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Title | A. baumannii Ribosome-Eravacycline complex: hpf-bound 70S | |||||||||
![]() | Combined density-modified map of Acinetobacter baumannii 70S-Eravacycline complex bound to hpf | |||||||||
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![]() | Acinetobacter baumannii / ribosome / eravacycline / antibiotic | |||||||||
Function / homology | ![]() primary metabolic process / large ribosomal subunit / regulation of translation / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / transferase activity / 5S rRNA binding / large ribosomal subunit rRNA binding ...primary metabolic process / large ribosomal subunit / regulation of translation / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / transferase activity / 5S rRNA binding / large ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / rRNA binding / negative regulation of translation / ribosome / structural constituent of ribosome / ribonucleoprotein complex / translation / mRNA binding / RNA binding / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.92 Å | |||||||||
![]() | Morgan CE / Yu EW | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-EM Determination of Eravacycline-Bound Structures of the Ribosome and the Multidrug Efflux Pump AdeJ of Acinetobacter baumannii. Authors: Zhemin Zhang / Christopher E Morgan / Robert A Bonomo / Edward W Yu / ![]() Abstract: Antibiotic-resistant strains of the Gram-negative pathogen Acinetobacter baumannii have emerged as a significant global health threat. One successful therapeutic option to treat bacterial infections ...Antibiotic-resistant strains of the Gram-negative pathogen Acinetobacter baumannii have emerged as a significant global health threat. One successful therapeutic option to treat bacterial infections has been to target the bacterial ribosome. However, in many cases, multidrug efflux pumps within the bacterium recognize and extrude these clinically important antibiotics designed to inhibit the protein synthesis function of the bacterial ribosome. Thus, multidrug efflux within A. baumannii and other highly drug-resistant strains is a major cause of failure of drug-based treatments of infectious diseases. We here report the first structures of the cinetobacter rug fflux (Ade)J pump in the presence of the antibiotic eravacycline, using single-particle cryo-electron microscopy (cryo-EM). We also describe cryo-EM structures of the eravacycline-bound forms of the A. baumannii ribosome, including the 70S, 50S, and 30S forms. Our data indicate that the AdeJ pump primarily uses hydrophobic interactions to bind eravacycline, while the 70S ribosome utilizes electrostatic interactions to bind this drug. Our work here highlights how an antibiotic can bind multiple bacterial targets through different mechanisms and potentially enables drug optimization by taking advantage of these different modes of ligand binding. Acinetobacter baumannii has developed into a highly antibiotic-resistant Gram-negative pathogen. The prevalent AdeJ multidrug efflux pump mediates resistance to different classes of antibiotics known to inhibit the function of the 70S ribosome. Here, we report the first structures of the A. baumannii AdeJ pump, both in the absence and presence of eravacycline. We also describe structures of the A. baumannii ribosome bound by this antibiotic. Our results indicate that AdeJ and the ribosome use very distinct binding modes for drug recognition. Our work will ultimately enable structure-based drug discovery to combat antibiotic-resistant A. baumannii infection. | |||||||||
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 | ![]() | 42.5 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 70.5 KB 70.5 KB | Display Display | ![]() |
Images | ![]() | 124.3 KB | ||
Filedesc metadata | ![]() | 13.5 KB | ||
Others | ![]() ![]() ![]() | 18 MB 47.1 MB 40.1 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7m4zMC ![]() 7m4pC ![]() 7m4qC ![]() 7m4uC ![]() 7m4vC ![]() 7m4wC ![]() 7m4xC ![]() 7m4yC M: atomic model generated by this map C: citing same article ( |
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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
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Combined density-modified map of Acinetobacter baumannii 70S-Eravacycline complex bound to hpf | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.848 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Additional map: Focus-refined and density modified map of 30S head...
File | emd_23671_additional_1.map | ||||||||||||
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Annotation | Focus-refined and density modified map of 30S head from A baumannii 70S-Eravacycline complex bound to hpf | ||||||||||||
Projections & Slices |
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Density Histograms |
-Additional map: Focus-refined and density modified map of 30S core...
File | emd_23671_additional_2.map | ||||||||||||
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Annotation | Focus-refined and density modified map of 30S core from A baumannii 70S-Eravacycline complex bound to hpf | ||||||||||||
Projections & Slices |
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Density Histograms |
-Additional map: Focus-refined and density modified map of 50S from...
File | emd_23671_additional_3.map | ||||||||||||
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Annotation | Focus-refined and density modified map of 50S from A baumannii 70S-Eravacycline complex bound to hpf | ||||||||||||
Projections & Slices |
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Density Histograms |
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Sample components
+Entire : A baumannii 70S ribosome with hpf in complex with Eravacycline
+Supramolecule #1: A baumannii 70S ribosome with hpf in complex with Eravacycline
+Macromolecule #1: 50S ribosomal protein L33
+Macromolecule #2: 50S ribosomal protein L34
+Macromolecule #3: 50S ribosomal protein L35
+Macromolecule #4: 50S ribosomal protein L36
+Macromolecule #7: 50S ribosomal protein L2
+Macromolecule #8: 50S ribosomal protein L3
+Macromolecule #9: 50S ribosomal protein L4
+Macromolecule #10: 50S ribosomal protein L5
+Macromolecule #11: 50S ribosomal protein L6
+Macromolecule #12: 50S ribosomal protein L9
+Macromolecule #13: 50S ribosomal protein L13
+Macromolecule #14: 50S ribosomal protein L14
+Macromolecule #15: 50S ribosomal protein L15
+Macromolecule #16: 50S ribosomal protein L16
+Macromolecule #17: 50S ribosomal protein L17
+Macromolecule #18: 50S ribosomal protein L18
+Macromolecule #19: 50S ribosomal protein L19
+Macromolecule #20: 50S ribosomal protein L20
+Macromolecule #21: 50S ribosomal protein L21
+Macromolecule #22: 50S ribosomal protein L22
+Macromolecule #23: 50S ribosomal protein L23
+Macromolecule #24: 50S ribosomal protein L24
+Macromolecule #25: 50S ribosomal protein L25
+Macromolecule #26: 50S ribosomal protein L27
+Macromolecule #27: 50S ribosomal protein L28
+Macromolecule #28: 50S ribosomal protein L29
+Macromolecule #29: 50S ribosomal protein L30
+Macromolecule #30: 50S ribosomal protein L32
+Macromolecule #32: 30S ribosomal protein S2
+Macromolecule #33: 30S ribosomal protein S3
+Macromolecule #34: 30S ribosomal protein S4
+Macromolecule #35: 30S ribosomal protein S5
+Macromolecule #36: 30S ribosomal protein S6
+Macromolecule #37: 30S ribosomal protein S7
+Macromolecule #38: 30S ribosomal protein S8
+Macromolecule #39: 30S ribosomal protein S9
+Macromolecule #40: 30S ribosomal protein S10
+Macromolecule #41: 30S ribosomal protein S11
+Macromolecule #42: 30S ribosomal protein S12
+Macromolecule #43: 30S ribosomal protein S13
+Macromolecule #44: 30S ribosomal protein S14
+Macromolecule #45: 30S ribosomal protein S15
+Macromolecule #46: 30S ribosomal protein S16
+Macromolecule #47: 30S ribosomal protein S17
+Macromolecule #48: 30S ribosomal protein S18
+Macromolecule #49: 30S ribosomal protein S19
+Macromolecule #50: 30S ribosomal protein S20
+Macromolecule #51: 30S ribosomal protein S21
+Macromolecule #52: Ribosomal subunit interface protein
+Macromolecule #5: 23s ribosomal RNA
+Macromolecule #6: 5s ribosomal RNA
+Macromolecule #31: 16s Ribosomal RNA
+Macromolecule #53: ZINC ION
+Macromolecule #54: Eravacycline
+Macromolecule #55: MAGNESIUM ION
+Macromolecule #56: 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: 7.6 |
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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 K3 (6k x 4k) / Average electron dose: 46.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: INSILICO MODEL / In silico model: ab initio |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 2.92 Å / Resolution method: FSC 0.143 CUT-OFF Details: 50S resolution = 2.92. 30S core resolution = 3.05. 30S head resolution = 3.04. Number images used: 11390 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC |