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- PDB-7uvy: A. baumannii ribosome-Streptothricin-D complex: 70S with P-site tRNA -
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Open data
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Basic information
Entry | Database: PDB / ID: 7uvy | |||||||||||||||||||||||||||
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Title | A. baumannii ribosome-Streptothricin-D complex: 70S with P-site tRNA | |||||||||||||||||||||||||||
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![]() | Ribosome/RNA / Streptothricin / Nourseothricin / Antibiotic / Ribosome / Ribosome-RNA complex | |||||||||||||||||||||||||||
Function / homology | ![]() large ribosomal subunit / transferase activity / ribosomal small subunit assembly / ribosomal small subunit biogenesis / small ribosomal subunit / small ribosomal subunit rRNA binding / 5S rRNA binding / ribosomal large subunit assembly / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding ...large ribosomal subunit / transferase activity / ribosomal small subunit assembly / ribosomal small subunit biogenesis / small ribosomal subunit / small ribosomal subunit rRNA binding / 5S rRNA binding / ribosomal large subunit assembly / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / ribonucleoprotein complex / mRNA binding / RNA binding / cytosol / cytoplasm Similarity search - Function | |||||||||||||||||||||||||||
Biological species | ![]() | |||||||||||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.39 Å | |||||||||||||||||||||||||||
![]() | Morgan, C.E. / Yu, E.W. | |||||||||||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Streptothricin F is a bactericidal antibiotic effective against highly drug-resistant gram-negative bacteria that interacts with the 30S subunit of the 70S ribosome. Authors: Christopher E Morgan / Yoon-Suk Kang / Alex B Green / Kenneth P Smith / Matthew G Dowgiallo / Brandon C Miller / Lucius Chiaraviglio / Katherine A Truelson / Katelyn E Zulauf / Shade ...Authors: Christopher E Morgan / Yoon-Suk Kang / Alex B Green / Kenneth P Smith / Matthew G Dowgiallo / Brandon C Miller / Lucius Chiaraviglio / Katherine A Truelson / Katelyn E Zulauf / Shade Rodriguez / Anthony D Kang / Roman Manetsch / Edward W Yu / James E Kirby / ![]() Abstract: The streptothricin natural product mixture (also known as nourseothricin) was discovered in the early 1940s, generating intense initial interest because of excellent gram-negative activity. Here, we ...The streptothricin natural product mixture (also known as nourseothricin) was discovered in the early 1940s, generating intense initial interest because of excellent gram-negative activity. Here, we establish the activity spectrum of nourseothricin and its main components, streptothricin F (S-F, 1 lysine) and streptothricin D (S-D, 3 lysines), purified to homogeneity, against highly drug-resistant, carbapenem-resistant Enterobacterales (CRE) and Acinetobacter baumannii. For CRE, the MIC50 and MIC90 for S-F and S-D were 2 and 4 μM, and 0.25 and 0.5 μM, respectively. S-F and nourseothricin showed rapid, bactericidal activity. S-F and S-D both showed approximately 40-fold greater selectivity for prokaryotic than eukaryotic ribosomes in in vitro translation assays. In vivo, delayed renal toxicity occurred at >10-fold higher doses of S-F compared with S-D. Substantial treatment effect of S-F in the murine thigh model was observed against the otherwise pandrug-resistant, NDM-1-expressing Klebsiella pneumoniae Nevada strain with minimal or no toxicity. Cryo-EM characterization of S-F bound to the A. baumannii 70S ribosome defines extensive hydrogen bonding of the S-F steptolidine moiety, as a guanine mimetic, to the 16S rRNA C1054 nucleobase (Escherichia coli numbering) in helix 34, and the carbamoylated gulosamine moiety of S-F with A1196, explaining the high-level resistance conferred by corresponding mutations at the residues identified in single rrn operon E. coli. Structural analysis suggests that S-F probes the A-decoding site, which potentially may account for its miscoding activity. Based on unique and promising activity, we suggest that the streptothricin scaffold deserves further preclinical exploration as a potential therapeutic for drug-resistant, gram-negative pathogens. | |||||||||||||||||||||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 3 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.7 MB | Display | ![]() |
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Full document | ![]() | 1.8 MB | Display | |
Data in XML | ![]() | 183 KB | Display | |
Data in CIF | ![]() | 334 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 26820MC ![]() 7uvvC ![]() 7uvwC ![]() 7uvxC ![]() 7uvzC ![]() 7uw1C M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
+50S ribosomal protein ... , 28 types, 28 molecules 0123CDEFGHIJKLMNOPQRSTUVWXYZ
-RNA chain , 5 types, 5 molecules ABavw
#5: RNA chain | Mass: 945315.250 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#6: RNA chain | Mass: 36996.992 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#31: RNA chain | Mass: 500297.531 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#52: RNA chain | Mass: 24760.799 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#53: RNA chain | Mass: 935.620 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-30S ribosomal protein ... , 20 types, 20 molecules bcdefghijklmnopqrstu
#32: Protein | Mass: 27680.357 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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#33: Protein | Mass: 27972.461 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#34: Protein | Mass: 23311.818 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#35: Protein | Mass: 17181.766 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#36: Protein | Mass: 14986.952 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#37: Protein | Mass: 17733.699 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#38: Protein | Mass: 14250.667 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#39: Protein | Mass: 14287.610 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#40: Protein | Mass: 11718.531 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#41: Protein | Mass: 13558.512 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#42: Protein | Mass: 13797.134 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#43: Protein | Mass: 13295.635 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#44: Protein | Mass: 11438.427 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#45: Protein | Mass: 10145.600 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#46: Protein | Mass: 11223.060 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#47: Protein | Mass: 9543.101 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#48: Protein | Mass: 9009.452 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#49: Protein | Mass: 10206.957 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#50: Protein | Mass: 9723.420 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
#51: Protein | Mass: 8474.033 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Non-polymers , 4 types, 19 molecules 






#54: Chemical | ChemComp-ZN / | ||||
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#55: Chemical | ChemComp-OIY / #56: Chemical | ChemComp-MG / | #57: Water | ChemComp-HOH / | |
-Details
Has ligand of interest | Y |
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Has protein modification | N |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: SD-70S Ribosome Complex with P-site tRNA / Type: RIBOSOME / Entity ID: #1-#53 / Source: NATURAL |
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Source (natural) | Organism: ![]() |
Buffer solution | pH: 7.4 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm |
Image recording | Electron dose: 36 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
EM software | Name: PHENIX / Version: 1.19_4080: / Category: model refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 2.39 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 144189 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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