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- PDB-7m4u: A. baumannii Ribosome-Eravacycline complex: 30S -

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Basic information

Entry
Database: PDB / ID: 7m4u
TitleA. baumannii Ribosome-Eravacycline complex: 30S
Components
  • (30S ribosomal protein ...) x 20
  • 16s Ribosomal RNA
KeywordsRIBOSOME / Acinetobacter baumannii / eravacycline / antibiotic
Function / homology
Function and homology information


ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / tRNA binding / rRNA binding / ribosome / structural constituent of ribosome / ribonucleoprotein complex ...ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / tRNA binding / rRNA binding / ribosome / structural constituent of ribosome / ribonucleoprotein complex / translation / mRNA binding / RNA binding / cytoplasm / cytosol
Similarity search - Function
Ribosomal protein S21, conserved site / Ribosomal protein S21 signature. / Ribosomal protein S14, bacterial/plastid / Ribosomal protein S21 superfamily / Ribosomal protein S21 / Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Ribosomal protein S21 / Ribosomal protein S3, bacterial-type / Ribosomal protein S6, conserved site ...Ribosomal protein S21, conserved site / Ribosomal protein S21 signature. / Ribosomal protein S14, bacterial/plastid / Ribosomal protein S21 superfamily / Ribosomal protein S21 / Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Ribosomal protein S21 / Ribosomal protein S3, bacterial-type / Ribosomal protein S6, conserved site / Ribosomal protein S6 signature. / Ribosomal protein S19, bacterial-type / Ribosomal protein S7, bacterial/organellar-type / Ribosomal protein S11, bacterial-type / Ribosomal protein S13, bacterial-type / Ribosomal protein S20 / Ribosomal protein S20 superfamily / Ribosomal protein S20 / Ribosomal protein S9, bacterial/plastid / Ribosomal protein S4, bacterial-type / 30S ribosomal protein S17 / Ribosomal protein S5, bacterial-type / Ribosomal protein S6, plastid/chloroplast / Ribosomal protein S2, bacteria/mitochondria/plastid / Ribosomal protein S18, conserved site / Ribosomal protein S18 signature. / Ribosomal protein S16 / Ribosomal protein S16 / Ribosomal protein S16 domain superfamily / Ribosomal protein S15, bacterial-type / Ribosomal protein S2 signature 2. / Ribosomal protein S6 / Ribosomal protein S6 / Ribosomal protein S6 superfamily / Ribosomal protein S12, bacterial-type / Translation elongation factor EF1B/ribosomal protein S6 / Ribosomal protein S18 / Ribosomal protein S18 / Ribosomal protein S18 superfamily / K Homology domain / K homology RNA-binding domain / Ribosomal protein S3, conserved site / Ribosomal protein S3 signature. / Ribosomal protein S10, conserved site / Ribosomal protein S10 signature. / Ribosomal protein S14, conserved site / Ribosomal protein S14 signature. / Ribosomal protein S2 signature 1. / KH domain / Type-2 KH domain profile. / K Homology domain, type 2 / : / Ribosomal protein S3, C-terminal / Ribosomal protein S3, C-terminal domain / Ribosomal protein S3, C-terminal domain superfamily / Ribosomal protein S15/S19, conserved site / Ribosomal protein S19 signature. / Ribosomal protein S10 / Ribosomal protein S19/S15 / Ribosomal protein S19/S15, superfamily / Ribosomal protein S19 / Ribosomal protein S2, conserved site / Ribosomal protein S5, N-terminal, conserved site / Ribosomal protein S5 signature. / Ribosomal protein S2 / Ribosomal protein S2, flavodoxin-like domain superfamily / Ribosomal protein S2 / Ribosomal protein S7, conserved site / Ribosomal protein S7 signature. / K homology domain superfamily, prokaryotic type / Ribosomal protein S17, conserved site / Ribosomal protein S17 signature. / S5 double stranded RNA-binding domain profile. / Ribosomal protein S5 / Ribosomal protein S5, N-terminal / Ribosomal protein S5, N-terminal domain / Ribosomal protein S5, C-terminal / Ribosomal protein S5, C-terminal domain / Ribosomal protein S13, conserved site / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S13 signature. / Ribosomal protein S13 / 30s ribosomal protein S13, C-terminal / Ribosomal protein S13/S18 / Ribosomal protein S13 family profile. / Ribosomal protein S8 signature. / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S4/S9, N-terminal / Ribosomal protein S4, conserved site / Ribosomal protein S4 signature. / Ribosomal protein S14 / Ribosomal protein S14p/S29e / Ribosomal protein S15 signature. / Ribosomal protein S4/S9 / K homology domain-like, alpha/beta / Ribosomal protein S8 / Ribosomal protein S8 superfamily / Ribosomal protein S8 / S4 RNA-binding domain profile. / Ribosomal S11, conserved site
Similarity search - Domain/homology
Eravacycline / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / 30S ribosomal protein S10 / 30S ribosomal protein S18 / Small ribosomal subunit protein bS21 / Small ribosomal subunit protein bS16 ...Eravacycline / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / 30S ribosomal protein S10 / 30S ribosomal protein S18 / Small ribosomal subunit protein bS21 / Small ribosomal subunit protein bS16 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein bS20 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein uS17 / Small ribosomal subunit protein uS19 / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS2
Similarity search - Component
Biological speciesAcinetobacter baumannii (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.71 Å
AuthorsMorgan, C.E. / Yu, E.W.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID) United States
CitationJournal: mBio / Year: 2021
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
DepositionMar 22, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 19, 2021Provider: repository / Type: Initial release
Revision 1.1Jun 9, 2021Group: Database references / Category: citation
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.2Jul 21, 2021Group: Database references / Category: citation / Item: _citation.journal_volume
Revision 1.3Mar 6, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

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Assembly

Deposited unit
a: 16s Ribosomal RNA
b: 30S ribosomal protein S2
c: 30S ribosomal protein S3
d: 30S ribosomal protein S4
e: 30S ribosomal protein S5
f: 30S ribosomal protein S6
g: 30S ribosomal protein S7
h: 30S ribosomal protein S8
i: 30S ribosomal protein S9
j: 30S ribosomal protein S10
k: 30S ribosomal protein S11
l: 30S ribosomal protein S12
m: 30S ribosomal protein S13
n: 30S ribosomal protein S14
o: 30S ribosomal protein S15
p: 30S ribosomal protein S16
q: 30S ribosomal protein S17
r: 30S ribosomal protein S18
s: 30S ribosomal protein S19
t: 30S ribosomal protein S20
u: 30S ribosomal protein S21
hetero molecules


Theoretical massNumber of molelcules
Total (without water)792,413105
Polymers789,83721
Non-polymers2,57684
Water3,441191
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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RNA chain , 1 types, 1 molecules a

#1: RNA chain 16s Ribosomal RNA


Mass: 500297.531 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: GenBank: 1211343212

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30S ribosomal protein ... , 20 types, 20 molecules bcdefghijklmnopqrstu

#2: Protein 30S ribosomal protein S2


Mass: 27680.357 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: V5VBC2
#3: Protein 30S ribosomal protein S3


Mass: 27972.461 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: V5V9N0
#4: Protein 30S ribosomal protein S4


Mass: 23311.818 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7IA15
#5: Protein 30S ribosomal protein S5


Mass: 17181.766 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7IA22
#6: Protein 30S ribosomal protein S6


Mass: 14986.952 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7IBC1
#7: Protein 30S ribosomal protein S7


Mass: 17733.699 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7I7S0
#8: Protein 30S ribosomal protein S8


Mass: 14250.667 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7IA25
#9: Protein 30S ribosomal protein S9


Mass: 14287.610 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: V5VBA5
#10: Protein 30S ribosomal protein S10


Mass: 11718.531 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: A0A009L7S8
#11: Protein 30S ribosomal protein S11


Mass: 13558.512 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: A0A4R0F9S8
#12: Protein 30S ribosomal protein S12


Mass: 13797.134 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7I7R9
#13: Protein 30S ribosomal protein S13


Mass: 13295.635 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7IA17
#14: Protein 30S ribosomal protein S14


Mass: 11438.427 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7IA26
#15: Protein 30S ribosomal protein S15


Mass: 10145.600 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7I3U0
#16: Protein 30S ribosomal protein S16


Mass: 11223.060 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: A0A1V3DIZ9
#17: Protein 30S ribosomal protein S17


Mass: 9543.101 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7IA30
#18: Protein 30S ribosomal protein S18


Mass: 9009.452 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: A0A022IPE7
#19: Protein 30S ribosomal protein S19


Mass: 10206.957 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7IA35
#20: Protein 30S ribosomal protein S20


Mass: 9723.420 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: B7I5N9
#21: Protein 30S ribosomal protein S21


Mass: 8474.033 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Acinetobacter baumannii (strain AB0057) (bacteria)
References: UniProt: A0A0Q7FMS9

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Non-polymers , 3 types, 275 molecules

#22: Chemical ChemComp-YQM / Eravacycline


Mass: 558.555 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C27H31FN4O8 / Feature type: SUBJECT OF INVESTIGATION / Comment: antibiotic*YM
#23: Chemical...
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 83 / Source method: obtained synthetically / Formula: Mg
#24: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 191 / Source method: isolated from a natural source / Formula: H2O

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Details

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: A baumannii 30S ribosome in complex with Eravacycline / Type: RIBOSOME / Entity ID: #1-#21 / Source: NATURAL
Source (natural)Organism: Acinetobacter baumannii AB0057 (bacteria)
Buffer solutionpH: 7.6
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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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: SPOT SCAN
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 46 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.19_4080: / Classification: refinement
EM softwareName: cryoSPARC / Category: final Euler assignment
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.71 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 47367
Details: Resolution of 30S core = 2.80. Resolution of 30S head = 2.71.
Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00255679
ELECTRON MICROSCOPYf_angle_d0.5282762
ELECTRON MICROSCOPYf_dihedral_angle_d14.39320941
ELECTRON MICROSCOPYf_chiral_restr0.03910501
ELECTRON MICROSCOPYf_plane_restr0.0044825

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