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- PDB-7qq3: Cryo-EM structure of the E.coli 50S ribosomal subunit in complex ... -

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Basic information

Entry
Database: PDB / ID: 7qq3
TitleCryo-EM structure of the E.coli 50S ribosomal subunit in complex with the antibiotic Myxovalargin A.
Components
  • (50S ribosomal protein ...) x 26
  • 23S ribosomal RNA
  • 5S ribosomal RNA
  • Myxovalargin A
KeywordsRIBOSOME / Antibiotic / Myxovalargin A / MyxA
Function / homology
Function and homology information


transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / positive regulation of ribosome biogenesis / negative regulation of cytoplasmic translation / DnaA-L2 complex / translation repressor activity / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / ribosome assembly ...transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / positive regulation of ribosome biogenesis / negative regulation of cytoplasmic translation / DnaA-L2 complex / translation repressor activity / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / ribosome assembly / assembly of large subunit precursor of preribosome / cytosolic ribosome assembly / response to reactive oxygen species / regulation of cell growth / DNA-templated transcription termination / response to radiation / mRNA 5'-UTR binding / large ribosomal subunit / ribosome binding / large ribosomal subunit rRNA binding / 5S rRNA binding / transferase activity / ribosomal large subunit assembly / cytoplasmic translation / cytosolic large ribosomal subunit / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / negative regulation of DNA-templated transcription / mRNA binding / DNA binding / RNA binding / zinc ion binding / cytosol / cytoplasm
Similarity search - Function
Ribosomal protein L25, short-form / : / Ribosomal protein L21, conserved site / Ribosomal protein L21 signature. / Ribosomal protein L16 signature 1. / : / Ribosomal protein L6, conserved site / Ribosomal protein L6 signature 1. / Ribosomal protein L16, conserved site / Ribosomal protein L16 signature 2. ...Ribosomal protein L25, short-form / : / Ribosomal protein L21, conserved site / Ribosomal protein L21 signature. / Ribosomal protein L16 signature 1. / : / Ribosomal protein L6, conserved site / Ribosomal protein L6 signature 1. / Ribosomal protein L16, conserved site / Ribosomal protein L16 signature 2. / Ribosomal protein L17 signature. / Ribosomal L25p family / Ribosomal protein L25 / Ribosomal protein L28/L24 superfamily / Ribosomal protein L36 signature. / Ribosomal protein L25/Gln-tRNA synthetase, N-terminal / Ribosomal protein L25/Gln-tRNA synthetase, anti-codon-binding domain superfamily / Ribosomal protein L32p, bacterial type / : / : / Ribosomal protein L28 / Ribosomal protein L35, conserved site / Ribosomal protein L35 signature. / Ribosomal protein L33, conserved site / Ribosomal protein L33 signature. / Ribosomal protein L35, non-mitochondrial / Ribosomal protein L18, bacterial-type / Ribosomal protein L6, bacterial-type / Ribosomal protein L19, conserved site / Ribosomal protein L19 signature. / Ribosomal protein L36 / Ribosomal protein L36 superfamily / Ribosomal protein L36 / Ribosomal protein L20 signature. / Ribosomal protein L27, conserved site / Ribosomal protein L27 signature. / Ribosomal protein L14P, bacterial-type / Ribosomal protein L34, conserved site / Ribosomal protein L34 signature. / Ribosomal protein L22, bacterial/chloroplast-type / Ribosomal protein L2, bacterial/organellar-type / Ribosomal protein L35 / Ribosomal protein L35 superfamily / Ribosomal protein L35 / Ribosomal L28 family / Ribosomal protein L33 / Ribosomal protein L33 / Ribosomal protein L28/L24 / Ribosomal protein L30, bacterial-type / Ribosomal protein L18 / Ribosomal L18 of archaea, bacteria, mitoch. and chloroplast / Ribosomal protein L33 superfamily / Ribosomal protein L16 / : / L28p-like / Ribosomal protein L20 / Ribosomal protein L20 / Ribosomal protein L20, C-terminal / Ribosomal protein L27 / Ribosomal L27 protein / Ribosomal protein L21 / Ribosomal protein L19 / Ribosomal protein L19 / Ribosomal protein L19 superfamily / Ribosomal proteins 50S L24/mitochondrial 39S L24 / Ribosomal protein L17 / Ribosomal protein L17 superfamily / Ribosomal protein L17 / Ribosomal protein L21-like / L21-like superfamily / Ribosomal prokaryotic L21 protein / Ribosomal L32p protein family / Ribosomal protein L32p / Ribosomal protein L24 / Ribosomal protein L34 / Ribosomal protein L34 / Ribosomal protein L13, bacterial-type / Ribosomal protein L3, bacterial/organelle-type / Ribosomal protein L15, bacterial-type / 50S ribosomal protein uL4 / Ribosomal protein L23/L25, conserved site / Ribosomal protein L23 signature. / Ribosomal protein L30, conserved site / Ribosomal protein L30 signature. / Ribosomal protein L2 signature. / Ribosomal protein L29, conserved site / Ribosomal protein L29 signature. / Ribosomal protein L15, conserved site / Ribosomal protein L15 signature. / Ribosomal protein L2, conserved site / : / Ribosomal protein L10e/L16 / Ribosomal protein L10e/L16 superfamily / Ribosomal protein L16p/L10e / Ribosomal protein L6, alpha-beta domain / Ribosomal protein L6 / Ribosomal protein L6 / Ribosomal protein L6, alpha-beta domain superfamily / Ribosomal protein L13 signature. / Ribosomal protein L2, domain 3
Similarity search - Domain/homology
: / : / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Large ribosomal subunit protein uL15 / Large ribosomal subunit protein bL19 / Large ribosomal subunit protein bL20 ...: / : / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Large ribosomal subunit protein uL15 / Large ribosomal subunit protein bL19 / Large ribosomal subunit protein bL20 / Large ribosomal subunit protein bL27 / Large ribosomal subunit protein bL28 / Large ribosomal subunit protein uL29 / Large ribosomal subunit protein bL32 / Large ribosomal subunit protein bL33 / Large ribosomal subunit protein bL34 / Large ribosomal subunit protein bL35 / Large ribosomal subunit protein bL36A / Large ribosomal subunit protein uL13 / Large ribosomal subunit protein uL14 / Large ribosomal subunit protein uL16 / Large ribosomal subunit protein uL23 / Large ribosomal subunit protein bL17 / Large ribosomal subunit protein bL21 / Large ribosomal subunit protein uL30 / Large ribosomal subunit protein uL6 / Large ribosomal subunit protein uL18 / Large ribosomal subunit protein uL2 / Large ribosomal subunit protein uL3 / Large ribosomal subunit protein uL24 / Large ribosomal subunit protein uL4 / Large ribosomal subunit protein uL22 / Large ribosomal subunit protein bL25
Similarity search - Component
Biological speciesEscherichia coli K-12 (bacteria)
Myxococcus fulvus (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.1 Å
AuthorsKoller, T.O. / Beckert, B. / Wilson, D.N.
Funding support Germany, 1items
OrganizationGrant numberCountry
German Research Foundation (DFG)WI3285/6-1 Germany
CitationJournal: J Am Chem Soc / Year: 2023
Title: The Myxobacterial Antibiotic Myxovalargin: Biosynthesis, Structural Revision, Total Synthesis, and Molecular Characterization of Ribosomal Inhibition.
Authors: Timm O Koller / Ullrich Scheid / Teresa Kösel / Jennifer Herrmann / Daniel Krug / Helena I M Boshoff / Bertrand Beckert / Joanna C Evans / Jan Schlemmer / Becky Sloan / Danielle M Weiner / ...Authors: Timm O Koller / Ullrich Scheid / Teresa Kösel / Jennifer Herrmann / Daniel Krug / Helena I M Boshoff / Bertrand Beckert / Joanna C Evans / Jan Schlemmer / Becky Sloan / Danielle M Weiner / Laura E Via / Atica Moosa / Thomas R Ioerger / Michael Graf / Boris Zinshteyn / Maha Abdelshahid / Fabian Nguyen / Stefan Arenz / Franziska Gille / Maik Siebke / Tim Seedorf / Oliver Plettenburg / Rachel Green / Anna-Luisa Warnke / Joachim Ullrich / Ralf Warrass / Clifton E Barry / Digby F Warner / Valerie Mizrahi / Andreas Kirschning / Daniel N Wilson / Rolf Müller /
Abstract: Resistance of bacterial pathogens against antibiotics is declared by WHO as a major global health threat. As novel antibacterial agents are urgently needed, we re-assessed the broad-spectrum ...Resistance of bacterial pathogens against antibiotics is declared by WHO as a major global health threat. As novel antibacterial agents are urgently needed, we re-assessed the broad-spectrum myxobacterial antibiotic myxovalargin and found it to be extremely potent against . To ensure compound supply for further development, we studied myxovalargin biosynthesis in detail enabling production via fermentation of a native producer. Feeding experiments as well as functional genomics analysis suggested a structural revision, which was eventually corroborated by the development of a concise total synthesis. The ribosome was identified as the molecular target based on resistant mutant sequencing, and a cryo-EM structure revealed that myxovalargin binds within and completely occludes the exit tunnel, consistent with a mode of action to arrest translation during a late stage of translation initiation. These studies open avenues for structure-based scaffold improvement toward development as an antibacterial agent.
History
DepositionJan 6, 2022Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jan 18, 2023Provider: repository / Type: Initial release
Revision 1.1Feb 1, 2023Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
I: 23S ribosomal RNA
J: 5S ribosomal RNA
K: 50S ribosomal protein L2
L: 50S ribosomal protein L3
M: 50S ribosomal protein L4
O: 50S ribosomal protein L6
R: 50S ribosomal protein L13
S: 50S ribosomal protein L14
T: 50S ribosomal protein L15
U: 50S ribosomal protein L16
V: 50S ribosomal protein L17
W: 50S ribosomal protein L18
X: 50S ribosomal protein L19
Y: 50S ribosomal protein L20
Z: 50S ribosomal protein L21
a: 50S ribosomal protein L22
b: 50S ribosomal protein L23
c: 50S ribosomal protein L24
d: 50S ribosomal protein L25
e: 50S ribosomal protein L27
f: 50S ribosomal protein L28
g: 50S ribosomal protein L29
h: 50S ribosomal protein L30
i: 50S ribosomal protein L32
j: 50S ribosomal protein L33
k: 50S ribosomal protein L34
l: 50S ribosomal protein L35
m: 50S ribosomal protein L36
B: Myxovalargin A
hetero molecules


Theoretical massNumber of molelcules
Total (without water)1,311,844175
Polymers1,308,25429
Non-polymers3,590146
Water50428
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area170700 Å2
ΔGint-2485 kcal/mol
Surface area472000 Å2
MethodPISA

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Components

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RNA chain , 2 types, 2 molecules IJ

#1: RNA chain 23S ribosomal RNA


Mass: 941752.562 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: GenBank: 939732440
#2: RNA chain 5S ribosomal RNA


Mass: 38815.098 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: GenBank: 1526269268

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50S ribosomal protein ... , 26 types, 26 molecules KLMORSTUVWXYZabcdefghijklm

#3: Protein 50S ribosomal protein L2 / Large ribosomal subunit protein uL2


Mass: 29923.619 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P60422
#4: Protein 50S ribosomal protein L3 / Large ribosomal subunit protein uL3


Mass: 22277.535 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P60438
#5: Protein 50S ribosomal protein L4 / Large ribosomal subunit protein uL4


Mass: 22121.566 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P60723
#6: Protein 50S ribosomal protein L6 / Large ribosomal subunit protein uL6


Mass: 18932.791 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0AG55
#7: Protein 50S ribosomal protein L13 / Large ribosomal subunit protein uL13


Mass: 16050.606 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0AA10
#8: Protein 50S ribosomal protein L14 / Large ribosomal subunit protein uL14


Mass: 13565.067 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0ADY3
#9: Protein 50S ribosomal protein L15 / Large ribosomal subunit protein uL15


Mass: 14879.357 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P02413
#10: Protein 50S ribosomal protein L16 / Large ribosomal subunit protein uL16


Mass: 15312.269 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0ADY7
#11: Protein 50S ribosomal protein L17 / Large ribosomal subunit protein bL17


Mass: 14393.657 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0AG44
#12: Protein 50S ribosomal protein L18 / Large ribosomal subunit protein uL18


Mass: 12794.668 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0C018
#13: Protein 50S ribosomal protein L19 / Large ribosomal subunit protein bL19


Mass: 13159.278 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0A7K6
#14: Protein 50S ribosomal protein L20 / Large ribosomal subunit protein bL20


Mass: 13528.024 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0A7L3
#15: Protein 50S ribosomal protein L21 / Large ribosomal subunit protein bL21


Mass: 11586.374 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0AG48
#16: Protein 50S ribosomal protein L22 / Large ribosomal subunit protein uL22


Mass: 12253.359 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P61175
#17: Protein 50S ribosomal protein L23 / Large ribosomal subunit protein uL23


Mass: 11222.160 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0ADZ0
#18: Protein 50S ribosomal protein L24 / Large ribosomal subunit protein uL24


Mass: 11339.250 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P60624
#19: Protein 50S ribosomal protein L25 / Large ribosomal subunit protein bL25


Mass: 10713.465 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P68919
#20: Protein 50S ribosomal protein L27 / Large ribosomal subunit protein bL27


Mass: 9146.540 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0A7L8
#21: Protein 50S ribosomal protein L28 / Large ribosomal subunit protein bL28


Mass: 9027.551 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0A7M2
#22: Protein 50S ribosomal protein L29 / Large ribosomal subunit protein uL29


Mass: 7286.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0A7M6
#23: Protein 50S ribosomal protein L30 / Large ribosomal subunit protein uL30


Mass: 6554.820 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0AG51
#24: Protein 50S ribosomal protein L32 / Large ribosomal subunit protein bL32


Mass: 6463.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0A7N4
#25: Protein 50S ribosomal protein L33 / Large ribosomal subunit protein bL33


Mass: 6388.631 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0A7N9
#26: Protein/peptide 50S ribosomal protein L34 / Large ribosomal subunit protein bL34


Mass: 5397.463 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0A7P5
#27: Protein 50S ribosomal protein L35 / Large ribosomal subunit protein bL35 / Ribosomal protein A


Mass: 7313.032 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0A7Q1
#28: Protein/peptide 50S ribosomal protein L36 / Large ribosomal subunit protein bL36-A / Ribosomal protein B


Mass: 4377.390 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli K-12 (bacteria) / References: UniProt: P0A7Q6

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Protein/peptide , 1 types, 1 molecules B

#29: Protein/peptide Myxovalargin A


Type: Peptide-like / Class: Antibiotic / Mass: 1678.092 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Myxococcus fulvus (bacteria) / References: BIRD: PRD_002442

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Non-polymers , 3 types, 174 molecules

#30: Chemical...
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 145 / Source method: obtained synthetically / Formula: Mg
#31: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Formula: Zn
#32: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 28 / Source method: isolated from a natural source / Formula: H2O

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Details

Compound detailsPubChem CID 137628402
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Cryo-EM structure of the E.coli 50S ribosomal subunit in complex with the antibiotic Myxovalargin A.
Type: RIBOSOME / Entity ID: #1-#29 / Source: NATURAL
Molecular weightValue: 1.356 MDa / Experimental value: NO
Source (natural)Organism: Escherichia coli (E. coli) / Strain: K-12 MG1650
Buffer solutionpH: 7.5
Details: Solutions were made fresh, pH was adjusted with potassium hydroxide at 4 degrees celcius and sterile filtered.
Buffer component
IDConc.NameFormulaBuffer-ID
10.05 mol/LHepesC8H18N2O4S1
20.1 mol/LPotassium acetateCH3CO2K1
30.08 mol/LAmmonium chlorideNH4Cl1
40.025 mol/LMagnesium acetateC4H6MgO41
50.002 mol/LDithiothreitolC4H10O2S21
60.01 %DDMC24H46O111
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: 7 OD(A260/mL) were applied to the grid.
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R3/3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE-PROPANE / Humidity: 100 % / Chamber temperature: 277 K / Details: 2 seconds blotting before plunging.

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 3000 nm / Nominal defocus min: 1000 nm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 44 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k)
Image scansMovie frames/image: 40

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Processing

EM software
IDNameVersionCategory
4RELION3.1CTF correction
7Coot0.9.6model fitting
9PHENIX1.19.2model refinement
10RELION3.1initial Euler assignment
11RELION3.1final Euler assignment
12RELION3.1classification
13RELION3.13D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 680054
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 580425 / Algorithm: FOURIER SPACE / Num. of class averages: 3 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Target criteria: Correlation coefficient
Atomic model buildingPDB-ID: 4YBB

4ybb

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