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- PDB-8eyt: 30S_delta_ksgA+KsgA complex -

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Basic information

Entry
Database: PDB / ID: 8eyt
Title30S_delta_ksgA+KsgA complex
Components
  • (30S ribosomal protein ...) x 19
  • 16S rRNA
  • Ribosomal RNA small subunit methyltransferase A
KeywordsRIBOSOME / KsgA
Function / homology
Function and homology information


16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase / 16S rRNA (adenine(1518)-N(6)/adenine(1519)-N(6))-dimethyltransferase activity / negative regulation of translational initiation / mRNA regulatory element binding translation repressor activity / transcription antitermination / maintenance of translational fidelity / DNA-templated transcription termination / mRNA 5'-UTR binding / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding ...16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase / 16S rRNA (adenine(1518)-N(6)/adenine(1519)-N(6))-dimethyltransferase activity / negative regulation of translational initiation / mRNA regulatory element binding translation repressor activity / transcription antitermination / maintenance of translational fidelity / DNA-templated transcription termination / mRNA 5'-UTR binding / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding / ribosomal small subunit assembly / cytosolic small ribosomal subunit / cytoplasmic translation / small ribosomal subunit / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / ribonucleoprotein complex / translation / response to antibiotic / mRNA binding / RNA binding / membrane / cytosol / cytoplasm
Similarity search - Function
rRNA adenine dimethylase-like, C-terminal / Ribosomal RNA adenine dimethylase / Ribosomal RNA adenine methylase transferase, conserved site / Ribosomal RNA adenine methylase transferase, N-terminal / Ribosomal RNA adenine dimethylases signature. / Ribosomal RNA adenine dimethylases / Ribosomal RNA adenine methyltransferase KsgA/Erm / Ribosomal RNA adenine dimethylase / rRNA adenine N(6)-methyltransferase family profile. / Ribosomal protein S14, bacterial/plastid ...rRNA adenine dimethylase-like, C-terminal / Ribosomal RNA adenine dimethylase / Ribosomal RNA adenine methylase transferase, conserved site / Ribosomal RNA adenine methylase transferase, N-terminal / Ribosomal RNA adenine dimethylases signature. / Ribosomal RNA adenine dimethylases / Ribosomal RNA adenine methyltransferase KsgA/Erm / Ribosomal RNA adenine dimethylase / rRNA adenine N(6)-methyltransferase family profile. / Ribosomal protein S14, bacterial/plastid / Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / 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 S14, conserved site / Ribosomal protein S10, conserved site / : / K Homology domain, type 2 / Ribosomal protein S3, C-terminal / Ribosomal protein S3, C-terminal domain superfamily / Ribosomal protein S15/S19, conserved site / KH domain / Ribosomal protein S19/S15 / Ribosomal protein S19/S15, superfamily / Ribosomal protein S10 / Ribosomal protein S3, C-terminal domain / Ribosomal protein S3 signature. / Ribosomal protein S10 signature. / Ribosomal protein S14 signature. / Ribosomal protein S7, conserved site / Ribosomal protein S17, conserved site / K homology domain superfamily, prokaryotic type / Ribosomal protein S19 / Ribosomal protein S2 signature 1. / Ribosomal protein S13, conserved site / Ribosomal protein S2, conserved site / Ribosomal protein S13 / 30s ribosomal protein S13, C-terminal / Ribosomal protein S2 / Ribosomal protein S2, flavodoxin-like domain superfamily / Ribosomal protein S2 / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S14 / Ribosomal protein S4/S9, N-terminal / Ribosomal protein S4, conserved site / Type-2 KH domain profile. / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S13/S18 / Ribosomal protein S4/S9 / Ribosomal protein S19 signature. / K homology domain-like, alpha/beta / Ribosomal protein S14p/S29e / Ribosomal protein S8 / Ribosomal protein S8 superfamily / Ribosomal protein S5, N-terminal, conserved site / Ribosomal protein S5 signature. / Ribosomal protein S5 / Ribosomal protein S5, N-terminal / Ribosomal S11, conserved site / Ribosomal protein S7 signature. / Ribosomal protein S10p/S20e / Ribosomal protein S13-like, H2TH / S5 double stranded RNA-binding domain profile. / Ribosomal protein S5, C-terminal / Ribosomal protein S9, conserved site / Ribosomal protein S5, N-terminal domain / Ribosomal protein S8 / Ribosomal protein S10 domain
Similarity search - Domain/homology
: / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein bS18 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS17 ...: / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein bS18 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS17 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein bS16 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein bS20 / Ribosomal RNA small subunit methyltransferase A / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein uS19 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein uS10
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.8 Å
AuthorsSun, J. / Kinman, L.F. / Jahagirdar, D. / Ortega, J. / Davis, J.H.
Funding support Canada, 1items
OrganizationGrant numberCountry
Canadian Institutes of Health Research (CIHR)CIHR PJT- 180305 Canada
CitationJournal: Nat Struct Mol Biol / Year: 2023
Title: KsgA facilitates ribosomal small subunit maturation by proofreading a key structural lesion.
Authors: Jingyu Sun / Laurel F Kinman / Dushyant Jahagirdar / Joaquin Ortega / Joseph H Davis /
Abstract: Ribosome assembly is orchestrated by many assembly factors, including ribosomal RNA methyltransferases, whose precise role is poorly understood. Here, we leverage the power of cryo-EM and machine ...Ribosome assembly is orchestrated by many assembly factors, including ribosomal RNA methyltransferases, whose precise role is poorly understood. Here, we leverage the power of cryo-EM and machine learning to discover that the E. coli methyltransferase KsgA performs a 'proofreading' function in the assembly of the small ribosomal subunit by recognizing and partially disassembling particles that have matured but are not competent for translation. We propose that this activity allows inactive particles an opportunity to reassemble into an active state, thereby increasing overall assembly fidelity. Detailed structural quantifications in our datasets additionally enabled the expansion of the Nomura assembly map to highlight rRNA helix and r-protein interdependencies, detailing how the binding and docking of these elements are tightly coupled. These results have wide-ranging implications for our understanding of the quality-control mechanisms governing ribosome biogenesis and showcase the power of heterogeneity analysis in cryo-EM to unveil functionally relevant information in biological systems.
History
DepositionOct 28, 2022Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 6, 2023Provider: repository / Type: Initial release
Revision 1.1Sep 13, 2023Group: Database references / Category: citation / Item: _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2Nov 1, 2023Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.3Nov 15, 2023Group: Data collection / Derived calculations / Category: chem_comp_atom / chem_comp_bond / struct_conn
Item: _chem_comp_atom.atom_id / _chem_comp_bond.atom_id_1 ..._chem_comp_atom.atom_id / _chem_comp_bond.atom_id_1 / _chem_comp_bond.atom_id_2 / _struct_conn.pdbx_leaving_atom_flag

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: 16S rRNA
B: 30S ribosomal protein S2
D: 30S ribosomal protein S4
E: 30S ribosomal protein S5
H: 30S ribosomal protein S8
L: 30S ribosomal protein S12
P: 30S ribosomal protein S16
Q: 30S ribosomal protein S17
T: 30S ribosomal protein S20
F: 30S ribosomal protein S3
G: 30S ribosomal protein S7
I: 30S ribosomal protein S9
J: 30S ribosomal protein S10
M: 30S ribosomal protein S13
N: 30S ribosomal protein S14
S: 30S ribosomal protein S19
O: 30S ribosomal protein S6
R: 30S ribosomal protein S11
U: 30S ribosomal protein S15
V: 30S ribosomal protein S18
W: Ribosomal RNA small subunit methyltransferase A


Theoretical massNumber of molelcules
Total (without water)768,22621
Polymers768,22621
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: assay for oligomerization
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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30S ribosomal protein ... , 19 types, 19 molecules BDEHLPQTFGIJMNSORUV

#2: Protein 30S ribosomal protein S2 /


Mass: 26781.670 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: C3TPN2
#3: Protein 30S ribosomal protein S4 /


Mass: 23514.199 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7V8
#4: Protein 30S ribosomal protein S5 /


Mass: 17629.398 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7W1
#5: Protein 30S ribosomal protein S8 /


Mass: 14146.557 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: D7XKZ3
#6: Protein 30S ribosomal protein S12 /


Mass: 13814.249 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: A0A0F1AUC4
#7: Protein 30S ribosomal protein S16 /


Mass: 9207.572 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: C3SYP2
#8: Protein 30S ribosomal protein S17 /


Mass: 9724.491 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: A0A8E0MHL6
#9: Protein 30S ribosomal protein S20 /


Mass: 9708.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: C3TRH7
#10: Protein 30S ribosomal protein S3 /


Mass: 26031.316 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: B7MCS9
#11: Protein 30S ribosomal protein S7 / / Small ribosomal subunit protein uS7


Mass: 20055.156 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P02359
#12: Protein 30S ribosomal protein S9 /


Mass: 14886.270 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: A0A1X3LT86
#13: Protein 30S ribosomal protein S10 /


Mass: 11755.597 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: V0ANK5
#14: Protein 30S ribosomal protein S13 /


Mass: 13128.467 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: A0A7U9IV78
#15: Protein 30S ribosomal protein S14 /


Mass: 11606.560 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: U9Y6H3
#16: Protein 30S ribosomal protein S19 /


Mass: 10455.355 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: S1EA57
#17: Protein 30S ribosomal protein S6 / / Small ribosomal subunit protein bS6


Mass: 15727.512 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P02358
#18: Protein 30S ribosomal protein S11 /


Mass: 13870.975 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: B7MCR3
#19: Protein 30S ribosomal protein S15 /


Mass: 10290.816 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: D8EB41
#20: Protein 30S ribosomal protein S18 /


Mass: 9005.472 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: A0A0E2KXL3

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RNA chain / Protein , 2 types, 2 molecules AW

#1: RNA chain 16S rRNA /


Mass: 458692.938 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: GenBank: 1776881223
#21: Protein Ribosomal RNA small subunit methyltransferase A / / 16S rRNA (adenine(1518)-N(6)/adenine(1519)-N(6))-dimethyltransferase / 16S rRNA dimethyladenosine ...16S rRNA (adenine(1518)-N(6)/adenine(1519)-N(6))-dimethyltransferase / 16S rRNA dimethyladenosine transferase / 16S rRNA dimethylase / S-adenosylmethionine-6-N' / N'-adenosyl(rRNA) dimethyltransferase


Mass: 28192.500 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Gene: rsmA, ksgA, BWG_0049 / Production host: Escherichia coli (E. coli)
References: UniProt: C4ZPX7, 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase

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Details

Has ligand of interestN

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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: 30S_delta_KsgA+KsgA / Type: RIBOSOME / Entity ID: #1, #3-#10, #12-#21 / Source: RECOMBINANT
Source (natural)Organism: Escherichia coli (E. coli)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.4
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: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2500 nm / Nominal defocus min: 1500 nm
Image recordingElectron dose: 72 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: dev_4340: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 231280 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.01854650
ELECTRON MICROSCOPYf_angle_d1.4580805
ELECTRON MICROSCOPYf_dihedral_angle_d16.50824973
ELECTRON MICROSCOPYf_chiral_restr0.08610187
ELECTRON MICROSCOPYf_plane_restr0.015021

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