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- PDB-9sx2: 30S Doxycycline Bound E. coli Ribosome -

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Basic information

Entry
Database: PDB / ID: 9sx2
Title30S Doxycycline Bound E. coli Ribosome
Components
  • (Small ribosomal subunit protein ...) x 20
  • 16S ribosomal RNA
  • Large ribosomal subunit protein bL31
KeywordsRIBOSOME / E. coli / inactive ribosome / doxycycline / 30S subunit / small subunit / pathogen / cryo-EM / antibiotic
Function / homology
Function and homology information


ribosomal small subunit assembly / ribosome biogenesis / ribosomal small subunit biogenesis / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / tRNA binding / rRNA binding / structural constituent of ribosome / ribosome ...ribosomal small subunit assembly / ribosome biogenesis / ribosomal small subunit biogenesis / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / tRNA binding / rRNA binding / structural constituent of ribosome / ribosome / translation / ribonucleoprotein complex / mRNA binding / RNA binding / metal ion binding / cytoplasm
Similarity search - Function
Ribosomal protein S21, conserved site / Ribosomal protein S21 signature. / Ribosomal protein S14, bacterial/plastid / Ribosomal protein L31 type A / Ribosomal protein S21 superfamily / Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Ribosomal protein S21 / Ribosomal protein L31 signature. / Ribosomal protein L31 ...Ribosomal protein S21, conserved site / Ribosomal protein S21 signature. / Ribosomal protein S14, bacterial/plastid / Ribosomal protein L31 type A / Ribosomal protein S21 superfamily / Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Ribosomal protein S21 / Ribosomal protein L31 signature. / Ribosomal protein L31 / Ribosomal protein L31 superfamily / Ribosomal protein L31 / Ribosomal protein S21 / Ribosomal protein S6, conserved site / Ribosomal protein S6 signature. / Ribosomal protein S3, bacterial-type / Ribosomal protein S13, bacterial-type / Ribosomal protein S19, bacterial-type / Ribosomal protein S7, bacterial/organellar-type / Ribosomal protein S11, bacterial-type / Ribosomal protein S20 / Ribosomal protein S20 superfamily / Ribosomal protein S20 / Ribosomal protein S4, bacterial-type / Ribosomal protein S5, bacterial-type / 30S ribosomal protein S17 / Ribosomal protein S6, plastid/chloroplast / Ribosomal protein S2, bacteria/mitochondria/plastid / Ribosomal protein S18, conserved site / Ribosomal protein S18 signature. / Ribosomal protein S9, bacterial/plastid / Ribosomal protein S16 / Ribosomal protein S16 domain superfamily / Ribosomal protein S16 / L28p-like / Ribosomal protein S15, bacterial-type / 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 / K Homology domain / K homology RNA-binding domain / Ribosomal protein S18 superfamily / Ribosomal protein S2 signature 2. / 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 S7, conserved site / Ribosomal protein S5, N-terminal, conserved site / Ribosomal protein S5 signature. / Ribosomal protein S7 signature. / Ribosomal protein S2, conserved site / K homology domain superfamily, prokaryotic type / : / Ribosomal protein S2 / Ribosomal protein S2, flavodoxin-like domain superfamily / Ribosomal protein S2 / Ribosomal protein S17, conserved site / Ribosomal protein S17 signature. / Ribosomal protein S5 / S5 double stranded RNA-binding domain profile. / Ribosomal protein S5, N-terminal / Ribosomal protein S13, conserved site / Ribosomal protein S13 signature. / Ribosomal protein S5, C-terminal / Ribosomal protein S5, N-terminal domain / Ribosomal protein S13 / 30s ribosomal protein S13, C-terminal / Ribosomal protein S13/S18 / Ribosomal protein S13 family profile. / Ribosomal protein S5, C-terminal domain / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S8 signature. / Ribosomal protein S4, conserved site / Ribosomal protein S4 signature. / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S4/S9, N-terminal / Ribosomal protein S15 signature. / K homology domain-like, alpha/beta / Ribosomal protein S14
Similarity search - Domain/homology
Chem-DXT / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein bS21 / Small ribosomal subunit protein bS18 ...Chem-DXT / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein bS21 / Small ribosomal subunit protein bS18 / Large ribosomal subunit protein bL31 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein uS10 / Small ribosomal subunit protein uS19 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS17 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein bS16 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein bS20 / Small ribosomal subunit protein bS6
Similarity search - Component
Biological speciesEscherichia coli BL21 (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.08 Å
AuthorsStuart, W.S. / Isupov, M.N. / Harmer, N.J.
Funding support United Kingdom, 1items
OrganizationGrant numberCountry
Biotechnology and Biological Sciences Research Council (BBSRC)BB/M009122/1 United Kingdom
CitationJournal: To Be Published
Title: 30S Doxycycline Bound E. coli Ribosome
Authors: Stuart, W.S. / Isupov, M.N. / McLaren, M. / Jenkins, C.H. / Monier, A. / Daum, B. / Norville, I.H. / Gold, V.A.M. / Harmer, N.J.
History
DepositionOct 8, 2025Deposition site: PDBE / Processing site: PDBE
Revision 1.0Apr 22, 2026Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
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Assembly

Deposited unit
4: Large ribosomal subunit protein bL31
A: 16S ribosomal RNA
B: Small ribosomal subunit protein uS2
C: Small ribosomal subunit protein uS3
D: Small ribosomal subunit protein uS4
E: Small ribosomal subunit protein uS5
F: Small ribosomal subunit protein bS6
G: Small ribosomal subunit protein uS7
H: Small ribosomal subunit protein uS8
I: Small ribosomal subunit protein uS9
L: Small ribosomal subunit protein uS12
M: Small ribosomal subunit protein uS13
N: Small ribosomal subunit protein uS14
O: Small ribosomal subunit protein uS15
P: Small ribosomal subunit protein bS16
Q: Small ribosomal subunit protein uS17
R: Small ribosomal subunit protein bS18
S: Small ribosomal subunit protein uS19
T: Small ribosomal subunit protein bS20
U: Small ribosomal subunit protein bS21
K: Small ribosomal subunit protein uS11
J: Small ribosomal subunit protein uS10
hetero molecules


Theoretical massNumber of molelcules
Total (without water)795,967170
Polymers791,85022
Non-polymers4,118148
Water23,3291295
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, Ribosome
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Small ribosomal subunit protein ... , 20 types, 20 molecules BCDEFGHILMNOPQRSTUKJ

#3: Protein Small ribosomal subunit protein uS2


Mass: 26781.670 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3TPN2
#4: Protein Small ribosomal subunit protein uS3


Mass: 26031.316 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SQX2
#5: Protein Small ribosomal subunit protein uS4


Mass: 23514.199 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SR62
#6: Protein Small ribosomal subunit protein uS5


Mass: 17571.363 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: A0A090BZW5
#7: Protein Small ribosomal subunit protein bS6


Mass: 15197.032 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: W8T6F0
#8: Protein Small ribosomal subunit protein uS7


Mass: 17637.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SQS2
#9: Protein Small ribosomal subunit protein uS8


Mass: 14146.557 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SR12
#10: Protein Small ribosomal subunit protein uS9


Mass: 14886.270 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SRY2
#11: Protein Small ribosomal subunit protein uS12


Mass: 13814.249 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SQR7
#12: Protein Small ribosomal subunit protein uS13


Mass: 13128.467 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SR52
#13: Protein Small ribosomal subunit protein uS14


Mass: 11606.560 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: A0A2X1PQW4
#14: Protein Small ribosomal subunit protein uS15


Mass: 10290.816 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SSQ7
#15: Protein Small ribosomal subunit protein bS16


Mass: 9207.572 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SYP2
#16: Protein Small ribosomal subunit protein uS17


Mass: 9724.491 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SQY7
#17: Protein Small ribosomal subunit protein bS18


Mass: 9005.472 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: A0AAD1DH49
#18: Protein Small ribosomal subunit protein uS19


Mass: 10455.355 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SQW2
#19: Protein Small ribosomal subunit protein bS20


Mass: 9708.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3TRH7
#20: Protein Small ribosomal subunit protein bS21


Mass: 8524.039 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: A0A6I7DAD8
#21: Protein Small ribosomal subunit protein uS11


Mass: 13871.959 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SR57
#22: Protein Small ribosomal subunit protein uS10


Mass: 11755.597 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SQT7

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Protein / RNA chain , 2 types, 2 molecules 4A

#1: Protein Large ribosomal subunit protein bL31


Mass: 7613.807 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria) / References: UniProt: C3SIV2
#2: RNA chain 16S ribosomal RNA


Mass: 497376.906 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli BL21(DE3) (bacteria)

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Non-polymers , 5 types, 1443 molecules

#23: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn
#24: Chemical ChemComp-DXT / (4S,4AR,5S,5AR,6R,12AS)-4-(DIMETHYLAMINO)-3,5,10,12,12A-PENTAHYDROXY-6-METHYL-1,11-DIOXO-1,4,4A,5,5A,6,11,12A-OCTAHYDROTETRACENE-2-CARBOXAMIDE / DOXYTETRACYCLINE / DOXYCYCLINE


Mass: 444.435 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C22H24N2O8 / Feature type: SUBJECT OF INVESTIGATION
#25: Chemical...
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 142 / Source method: obtained synthetically / Formula: Mg
#26: Chemical
ChemComp-K / POTASSIUM ION


Mass: 39.098 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: K
#27: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 1295 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY
Has protein modificationY

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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: Escherichia coli 30S Ribosome subunit / Type: RIBOSOME / Entity ID: #1-#22 / Source: NATURAL
Source (natural)Organism: Escherichia coli BL21 (bacteria) / Strain: BL21
Buffer solutionpH: 7.5 / Details: BS100 ribosomal resuspension buffer
Buffer component
IDConc.NameFormulaBuffer-ID
125 mMHEPESC8H18N2O4S1
2100 mMPotassium acetateCH3COOK1
315 mMMagnesium AcetateMg(OAc)1
41 mMDTTC4H10O2S21
SpecimenConc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/2
VitrificationCryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 298 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 130000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 400 nm / Cs: 2.7 mm
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 45 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of real images: 34720
Image scansWidth: 5760 / Height: 4092

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Processing

EM software
IDNameVersionCategory
1crYOLOparticle selection
2cryoSPARC4particle selection
3EPUimage acquisition
5cryoSPARC4CTF correction
8Cootmodel fitting
9UCSF ChimeraXmodel fitting
10ISOLDEmodel fitting
15cryoSPARC43D reconstruction
16REFMACmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.08 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 372420 / Symmetry type: POINT
Atomic model buildingPDB-ID: 7k00

7k00


Accession code: 7k00 / Source name: PDB / Type: experimental model

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