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- PDB-3iy8: Leishmania tarentolae Mitonchondrial Ribosome small subunit -

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Basic information

Entry
Database: PDB / ID: 3iy8
TitleLeishmania tarentolae Mitonchondrial Ribosome small subunit
Components
  • (30S ribosomal protein ...) x 10
  • Leishmania tarentolae mitochondrial small subunit
KeywordsRIBOSOME / Leishmania tarentolae / Mitochondrial ribosome / CryoEM / Minimal RNA. / Antibiotic resistance / Ribonucleoprotein / Ribosomal protein / RNA-binding / rRNA-binding / Repressor / Translation regulation / tRNA-binding / Methylation / Endonuclease / Hydrolase / Nuclease
Function / homology
Function and homology information


misfolded RNA binding / Group I intron splicing / RNA folding / four-way junction DNA binding / regulation of mRNA stability / positive regulation of RNA splicing / DNA endonuclease activity / maintenance of translational fidelity / mRNA 5'-UTR binding / small ribosomal subunit rRNA binding ...misfolded RNA binding / Group I intron splicing / RNA folding / four-way junction DNA binding / regulation of mRNA stability / positive regulation of RNA splicing / DNA endonuclease activity / maintenance of translational fidelity / mRNA 5'-UTR binding / small ribosomal subunit rRNA binding / ribosomal small subunit assembly / cytosolic small ribosomal subunit / regulation of translation / small ribosomal subunit / cytoplasmic translation / tRNA binding / molecular adaptor activity / rRNA binding / ribosome / structural constituent of ribosome / translation / ribonucleoprotein complex / response to antibiotic / RNA binding / zinc ion binding / cytosol / cytoplasm
Similarity search - Function
Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Ribosomal protein S6, conserved site / Ribosomal protein S6 signature. / Ribosomal protein S11, bacterial-type / Ribosomal protein S9, bacterial/plastid / 30S ribosomal protein S17 / Ribosomal protein S5, bacterial-type / Ribosomal protein S6, plastid/chloroplast / Ribosomal protein S18, conserved site ...Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Ribosomal protein S6, conserved site / Ribosomal protein S6 signature. / Ribosomal protein S11, bacterial-type / Ribosomal protein S9, bacterial/plastid / 30S ribosomal protein S17 / Ribosomal protein S5, bacterial-type / Ribosomal protein S6, plastid/chloroplast / 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 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 / : / Ribosomal protein S17, conserved site / Ribosomal protein S8 / Ribosomal protein S8 superfamily / Ribosomal protein S5, N-terminal, conserved site / Ribosomal protein S5 signature. / S5 double stranded RNA-binding domain profile. / Ribosomal protein S5 / Ribosomal protein S5, N-terminal / Ribosomal protein S9, conserved site / Ribosomal protein S8 / Ribosomal protein S5, N-terminal domain / Ribosomal protein S5, C-terminal / Ribosomal protein S17 signature. / Ribosomal protein S5, C-terminal domain / Ribosomal protein S8 signature. / Ribosomal protein S9 / Ribosomal S11, conserved site / Ribosomal protein S17/S11 / Ribosomal_S15 / Ribosomal protein S15 signature. / Ribosomal protein S15 / Ribosomal protein S12/S23 / Ribosomal protein S11 / Ribosomal protein S11 / Ribosomal protein S9/S16 / Ribosomal protein S12/S23 / Ribosomal protein S17 / Ribosomal protein S15 / Ribosomal protein S11 signature. / Ribosomal protein S9 signature. / Ribosomal protein S12 signature. / Ribosomal protein S11 superfamily / S15/NS1, RNA-binding / Ribosomal protein S5 domain 2-type fold, subgroup / Ribosomal protein S5 domain 2-type fold / Nucleic acid-binding, OB-fold
Similarity search - Domain/homology
RNA / RNA (> 10) / RNA (> 100) / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein bS16 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS9 ...RNA / RNA (> 10) / RNA (> 100) / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein bS16 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS17 / 30S ribosomal protein S18 / Small ribosomal subunit protein uS15
Similarity search - Component
Biological speciesLeishmania tarentolae (eukaryote)
Escherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 14.1 Å
AuthorsSharma, M.R. / Booth, T.M. / Simpson, L. / Maslov, D.A. / Agrawal, R.K.
CitationJournal: Proc Natl Acad Sci U S A / Year: 2009
Title: Structure of a mitochondrial ribosome with minimal RNA.
Authors: Manjuli R Sharma / Timothy M Booth / Larry Simpson / Dmitri A Maslov / Rajendra K Agrawal /
Abstract: The Leishmania tarentolae mitochondrial ribosome (Lmr) is a minimal ribosomal RNA (rRNA)-containing ribosome. We have obtained a cryo-EM map of the Lmr. The map reveals several features that have not ...The Leishmania tarentolae mitochondrial ribosome (Lmr) is a minimal ribosomal RNA (rRNA)-containing ribosome. We have obtained a cryo-EM map of the Lmr. The map reveals several features that have not been seen in previously-determined structures of eubacterial or eukaryotic (cytoplasmic or organellar) ribosomes to our knowledge. Comparisons of the Lmr map with X-ray crystallographic and cryo-EM maps of the eubacterial ribosomes and a cryo-EM map of the mammalian mitochondrial ribosome show that (i) the overall structure of the Lmr is considerably more porous, (ii) the topology of the intersubunit space is significantly different, with fewer intersubunit bridges, but more tunnels, and (iii) several of the functionally-important rRNA regions, including the alpha-sarcin-ricin loop, have different relative positions within the structure. Furthermore, the major portions of the mRNA channel, the tRNA passage, and the nascent polypeptide exit tunnel contain Lmr-specific proteins, suggesting that the mechanisms for mRNA recruitment, tRNA interaction, and exiting of the nascent polypeptide in Lmr must differ markedly from the mechanisms deduced for ribosomes in other organisms. Our study identifies certain structural features that are characteristic solely of mitochondrial ribosomes and other features that are characteristic of both mitochondrial and chloroplast ribosomes (i.e., organellar ribosomes).
History
DepositionApr 16, 2009Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 7, 2009Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Jul 18, 2018Group: Data collection / Category: em_image_scans / em_software / Item: _em_software.image_processing_id
Revision 1.3Feb 21, 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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Assembly

Deposited unit
A: Leishmania tarentolae mitochondrial small subunit
E: 30S ribosomal protein S5
F: 30S ribosomal protein S6
H: 30S ribosomal protein S8
I: 30S ribosomal protein S9
K: 30S ribosomal protein S11
L: 30S ribosomal protein S12
O: 30S ribosomal protein S15
P: 30S ribosomal protein S16
Q: 30S ribosomal protein S17
R: 30S ribosomal protein S18


Theoretical massNumber of molelcules
Total (without water)289,51711
Polymers289,51711
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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RNA chain , 1 types, 1 molecules A

#1: RNA chain Leishmania tarentolae mitochondrial small subunit / Coordinate model: P atoms only


Mass: 172221.844 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Leishmania tarentolae (eukaryote)

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30S ribosomal protein ... , 10 types, 10 molecules EFHIKLOPQR

#2: Protein 30S ribosomal protein S5 / / Coordinate model: Cα atoms only


Mass: 15804.282 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7W1
#3: Protein 30S ribosomal protein S6 / / Coordinate model: Cα atoms only


Mass: 11669.371 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P02358
#4: Protein 30S ribosomal protein S8 / / Coordinate model: Cα atoms only


Mass: 14015.361 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7W7
#5: Protein 30S ribosomal protein S9 / / Coordinate model: Cα atoms only


Mass: 14554.882 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7X3
#6: Protein 30S ribosomal protein S11 / / Coordinate model: Cα atoms only


Mass: 12487.200 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7R9
#7: Protein 30S ribosomal protein S12 / / Coordinate model: Cα atoms only


Mass: 13636.961 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7S3
#8: Protein 30S ribosomal protein S15 / / Coordinate model: Cα atoms only


Mass: 10188.687 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: Q8X9M2
#9: Protein 30S ribosomal protein S16 / / Coordinate model: Cα atoms only


Mass: 9207.572 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0A7T3
#10: Protein 30S ribosomal protein S17 / / Coordinate model: Cα atoms only


Mass: 9263.946 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: P0AG63
#11: Protein 30S ribosomal protein S18 / / Coordinate model: Cα atoms only


Mass: 6466.477 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Escherichia coli (E. coli) / References: UniProt: Q1R358

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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: Leishmania Mitochondrial 50S Ribosome / Type: RIBOSOME / Details: Monomer
Molecular weightValue: 2.1 MDa / Experimental value: YES
Buffer solutionpH: 7.5
Details: 50 mM Tris-HCl, pH 7.5, 100 mM KCl, 10 mM MgCl2, 3 mM DTT, 0.1 mM EDTA and 0.05% dodecyl maltoside
SpecimenConc.: 0.067 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Details: 50 mM Tris-HCl, pH 7.5, 100 mM KCl, 10 mM MgCl2, 3 mM DTT, 0.1 mM EDTA and 0.05% dodecyl maltoside
VitrificationInstrument: FEI VITROBOT MARK I / Cryogen name: ETHANE / Humidity: 90 % / Method: Plunge freeze

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Electron microscopy imaging

Experimental equipment
Model: Tecnai F20 / Image courtesy: FEI Company
MicroscopyModel: FEI TECNAI F20
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 50000 X / Calibrated magnification: 50760 X / Nominal defocus max: 4500 nm / Nominal defocus min: 1600 nm / Camera length: 0 mm
Specimen holderSpecimen holder model: OTHER / Specimen holder type: eucentric / Temperature: 80 K / Tilt angle max: 0 ° / Tilt angle min: 0 °
Image recordingFilm or detector model: KODAK SO-163 FILM
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthRelative weight: 1

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Processing

EM softwareName: SPIDER / Category: 3D reconstruction
CTF correctionDetails: Each Micrograph
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionMethod: Projection Matching / Resolution: 14.1 Å / Resolution method: FSC 0.5 CUT-OFF / Num. of particles: 53475 / Symmetry type: POINT
Atomic model buildingSpace: REAL
Refinement stepCycle: LAST
ProteinNucleic acidLigandSolventTotal
Num. atoms1051 540 0 0 1591

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