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- PDB-5lmp: Structure of bacterial 30S-IF1-IF3-mRNA translation pre-initiatio... -

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Entry
Database: PDB / ID: 5lmp
TitleStructure of bacterial 30S-IF1-IF3-mRNA translation pre-initiation complex (state-1C)
Components
  • (30S ribosomal protein ...) x 20
  • (Translation initiation factor IF- ...) x 2
  • 16S rRNA
  • mRNA
KeywordsRIBOSOME / translation / initiation factors / 30S / IF1 / IF3 / PIC / Thermus thermophilus
Function / homology
Function and homology information


translation initiation factor activity / ribosome binding / ribosomal small subunit assembly / small ribosomal subunit / cytosolic small ribosomal subunit / tRNA binding / rRNA binding / ribosome / structural constituent of ribosome / ribonucleoprotein complex ...translation initiation factor activity / ribosome binding / ribosomal small subunit assembly / small ribosomal subunit / cytosolic small ribosomal subunit / tRNA binding / rRNA binding / ribosome / structural constituent of ribosome / ribonucleoprotein complex / translation / mRNA binding / zinc ion binding / metal ion binding / cytosol / cytoplasm
Similarity search - Function
Translation initiation factor 3, C-terminal / Translation initiation factor IF-3, C-terminal domain / Translation initiation factor IF-1 / Translation initiation factor 3 / Translation initiation factor 3, N-terminal / Translation initiation factor 3 (IF-3), N-terminal domain superfamily / Translation initiation factor 3 (IF-3), C-terminal domain superfamily / Translation initiation factor IF-3, N-terminal domain / RNA-binding domain, S1, IF1 type / Translation initiation factor 1A / IF-1 ...Translation initiation factor 3, C-terminal / Translation initiation factor IF-3, C-terminal domain / Translation initiation factor IF-1 / Translation initiation factor 3 / Translation initiation factor 3, N-terminal / Translation initiation factor 3 (IF-3), N-terminal domain superfamily / Translation initiation factor 3 (IF-3), C-terminal domain superfamily / Translation initiation factor IF-3, N-terminal domain / RNA-binding domain, S1, IF1 type / Translation initiation factor 1A / IF-1 / S1 domain IF1 type profile. / 30S ribosomal protein Thx / 30S ribosomal protein Thx / 30S ribosomal protein / Ribosomal protein S14, type Z / Ribosomal protein S14/S29 / Ribosomal protein S3, bacterial-type / Ribosomal protein S6, conserved site / Ribosomal protein S6 signature. / Ribosomal protein S19, bacterial-type / Ribosomal protein S13, 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 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 domain superfamily / Ribosomal protein S16 / 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 / K Homology domain / K homology RNA-binding domain / Ribosomal protein S10, conserved site / Ribosomal protein S10 signature. / Ribosomal protein S3, conserved site / Ribosomal protein S3 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 S5, N-terminal, conserved site / Ribosomal protein S5 signature. / Ribosomal protein S2, conserved site / Ribosomal protein S7, conserved site / Ribosomal protein S7 signature. / Ribosomal protein S2 / Ribosomal protein S2, flavodoxin-like domain superfamily / Ribosomal protein S2 / Ribosomal protein S5 / Ribosomal protein S17, conserved site / Ribosomal protein S17 signature. / S5 double stranded RNA-binding domain profile. / K homology domain superfamily, prokaryotic type / 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 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, conserved site / Ribosomal protein S4 signature. / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S4/S9, N-terminal / Ribosomal protein S15 signature. / Ribosomal protein S14 / Ribosomal protein S14p/S29e
Similarity search - Domain/homology
: / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein uS17 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein uS2 ...: / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein uS17 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein bS20 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS10 / Small ribosomal subunit protein uS19 / 30S ribosomal protein S17 / 30S ribosomal protein S14 type Z / 30S ribosomal protein S8 / Small ribosomal subunit protein uS5 / Translation initiation factor IF-1 / Small ribosomal subunit protein bTHX / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein bS16 / Translation initiation factor IF-3 / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein bS18
Similarity search - Component
Biological speciesThermus thermophilus (bacteria)
Thermus thermophilus HB8 (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 5.35 Å
AuthorsHussain, T. / Llacer, J.L. / Wimberly, B.T. / Ramakrishnan, V.
CitationJournal: Cell / Year: 2016
Title: Large-Scale Movements of IF3 and tRNA during Bacterial Translation Initiation.
Authors: Tanweer Hussain / Jose L Llácer / Brian T Wimberly / Jeffrey S Kieft / V Ramakrishnan /
Abstract: In bacterial translational initiation, three initiation factors (IFs 1-3) enable the selection of initiator tRNA and the start codon in the P site of the 30S ribosomal subunit. Here, we report 11 ...In bacterial translational initiation, three initiation factors (IFs 1-3) enable the selection of initiator tRNA and the start codon in the P site of the 30S ribosomal subunit. Here, we report 11 single-particle cryo-electron microscopy (cryoEM) reconstructions of the complex of bacterial 30S subunit with initiator tRNA, mRNA, and IFs 1-3, representing different steps along the initiation pathway. IF1 provides key anchoring points for IF2 and IF3, thereby enhancing their activities. IF2 positions a domain in an extended conformation appropriate for capturing the formylmethionyl moiety charged on tRNA. IF3 and tRNA undergo large conformational changes to facilitate the accommodation of the formylmethionyl-tRNA (fMet-tRNA(fMet)) into the P site for start codon recognition.
History
DepositionAug 1, 2016Deposition site: PDBE / Processing site: PDBE
Revision 1.0Oct 5, 2016Provider: repository / Type: Initial release
Revision 1.1Aug 2, 2017Group: Data collection / Derived calculations
Category: em_image_scans / em_software ...em_image_scans / em_software / pdbx_struct_conn_angle / struct_conn
Item: _em_software.name / _em_software.version
Revision 1.2Feb 20, 2019Group: Advisory / Data collection / Derived calculations
Category: em_admin / pdbx_data_processing_status ...em_admin / pdbx_data_processing_status / pdbx_database_proc / pdbx_seq_map_depositor_info / pdbx_unobs_or_zero_occ_atoms / pdbx_validate_close_contact / struct_conn / struct_conn_type
Item: _em_admin.last_update / _pdbx_seq_map_depositor_info.one_letter_code / _pdbx_seq_map_depositor_info.one_letter_code_mod
Revision 1.3Oct 2, 2019Group: Data collection / Other / Category: atom_sites / cell
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] ..._atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3] / _cell.length_a / _cell.length_b / _cell.length_c
Revision 1.4Oct 16, 2024Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_admin / pdbx_entry_details / pdbx_modification_feature / struct_conn
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id

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Structure visualization

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Assembly

Deposited unit
A: 16S rRNA
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 type Z
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
V: 30S ribosomal protein Thx
W: Translation initiation factor IF-1
X: Translation initiation factor IF-3
Y: mRNA
hetero molecules


Theoretical massNumber of molelcules
Total (without water)826,828134
Polymers824,07224
Non-polymers2,756110
Water00
1


  • Idetical with deposited unit
  • defined by software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area121370 Å2
ΔGint-1756 kcal/mol
Surface area274890 Å2
MethodPISA

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Components

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RNA chain , 2 types, 2 molecules AY

#1: RNA chain 16S rRNA


Mass: 493958.281 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Thermus thermophilus HB8 (bacteria) / References: GenBank: 55771382
#24: RNA chain mRNA


Mass: 12525.466 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Thermus thermophilus (bacteria)

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

#2: Protein 30S ribosomal protein S2


Mass: 29317.703 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80371
#3: Protein 30S ribosomal protein S3


Mass: 26751.076 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80372
#4: Protein 30S ribosomal protein S4


Mass: 24373.447 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80373
#5: Protein 30S ribosomal protein S5


Mass: 17583.416 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHQ5
#6: Protein 30S ribosomal protein S6 / TS9


Mass: 11988.753 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SLP8
#7: Protein 30S ribosomal protein S7


Mass: 18050.973 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P17291
#8: Protein 30S ribosomal protein S8


Mass: 15868.570 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHQ2, UniProt: P0DOY9*PLUS
#9: Protein 30S ribosomal protein S9


Mass: 14410.614 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80374
#10: Protein 30S ribosomal protein S10


Mass: 11954.968 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHN7
#11: Protein 30S ribosomal protein S11


Mass: 13737.868 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80376
#12: Protein 30S ribosomal protein S12


Mass: 14637.384 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHN3
#13: Protein 30S ribosomal protein S13


Mass: 14338.861 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80377
#14: Protein 30S ribosomal protein S14 type Z


Mass: 7158.725 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHQ1, UniProt: P0DOY6*PLUS
#15: Protein 30S ribosomal protein S15


Mass: 10578.407 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SJ76
#16: Protein 30S ribosomal protein S16


Mass: 10409.983 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SJH3
#17: Protein 30S ribosomal protein S17


Mass: 12325.655 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHP7, UniProt: P0DOY7*PLUS
#18: Protein 30S ribosomal protein S18


Mass: 10258.299 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SLQ0
#19: Protein 30S ribosomal protein S19


Mass: 10605.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHP2
#20: Protein 30S ribosomal protein S20


Mass: 11736.143 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80380
#21: Protein/peptide 30S ribosomal protein Thx / S31


Mass: 3350.030 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SIH3

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Translation initiation factor IF- ... , 2 types, 2 molecules WX

#22: Protein Translation initiation factor IF-1


Mass: 8247.664 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / Gene: infA, TTHA1669 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q5SHR1
#23: Protein Translation initiation factor IF-3


Mass: 19904.377 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) (bacteria)
Strain: HB8 / ATCC 27634 / DSM 579 / Gene: infC, TTHA0551 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q5SKU2

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Non-polymers , 2 types, 110 molecules

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


Mass: 24.305 Da / Num. of mol.: 108 / Source method: obtained synthetically / Formula: Mg
#26: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn

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Details

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: 30S-IF1-IF3-mRNA pre-initiation complex (state-1C) / Type: RIBOSOME / Entity ID: #1-#24 / Source: MULTIPLE SOURCES
Molecular weightValue: 0.8261 MDa / Experimental value: NO
Buffer solutionpH: 7.5
Buffer component
IDConc.NameBuffer-ID
15 mMHepes-K1
210 mMMagnessium acetate1
350 mMPotassium chloride1
410 mMAmmonium chloride1
56 mMBeta mercaptoethanol1
SpecimenConc.: 0.08 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil
VitrificationInstrument: FEI VITROBOT MARK I / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

Experimental equipment
Model: Tecnai Polara / Image courtesy: FEI Company
MicroscopyModel: FEI POLARA 300
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 78000 X / Calibrated magnification: 104478 X / Nominal defocus max: 3500 nm / Nominal defocus min: 1500 nm / Cs: 2 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Temperature (max): 100 K / Temperature (min): 90 K
Image recordingAverage exposure time: 1.1 sec. / Electron dose: 30 e/Å2 / Film or detector model: OTHER / Num. of grids imaged: 5 / Num. of real images: 4400
Details: Recorded in a FEI Falcon III direct electron detector. Images were collected in movie-mode at 32 frames per second

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Processing

EM software
IDNameVersionCategory
1RELION1.4particle selection
2EMANparticle selection
3EPUimage acquisition
5CTFFIND3CTF correction
8UCSF Chimera1.1model fitting
9Coot0.8model fitting
11RELION1.4initial Euler assignment
12RELION1.4final Euler assignment
13RELION1.4classification
14RELION1.43D reconstruction
15REFMAC5.8model refinement
Image processingDetails: FEI Falcon III
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 666610
3D reconstructionResolution: 5.35 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 18830 / Algorithm: FOURIER SPACE / Symmetry type: POINT
Atomic model buildingProtocol: OTHER / Space: RECIPROCAL / Target criteria: FSC

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