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- EMDB-36620: Structure of the 30S-body-IF3 complex from Escherichia coli -

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Basic information

Entry
Database: EMDB / ID: EMD-36620
TitleStructure of the 30S-body-IF3 complex from Escherichia coli
Map dataMap of the 30S-body and IF3 complex
Sample
  • Complex: Complex of the small ribosomal subunit (30S) body and Translation initiation factor 3 (IF3) in Escherichia coli
    • Organelle or cellular component: Initiation factor 3
      • Protein or peptide: x 1 types
    • Organelle or cellular component: Body of the 30S subunit of ribosome
      • Protein or peptide: x 12 types
      • RNA: x 1 types
KeywordsRibosome / 30S / IF3 / Translation initiation / TRANSLATION
Function / homology
Function and homology information


ribosome disassembly / ornithine decarboxylase inhibitor activity / misfolded RNA binding / Group I intron splicing / RNA folding / four-way junction DNA binding / negative regulation of translational initiation / regulation of mRNA stability / translation initiation factor activity / mRNA regulatory element binding translation repressor activity ...ribosome disassembly / ornithine decarboxylase inhibitor activity / misfolded RNA binding / Group I intron splicing / RNA folding / four-way junction DNA binding / negative regulation of translational initiation / regulation of mRNA stability / translation initiation factor activity / mRNA regulatory element binding translation repressor activity / positive regulation of RNA splicing / DNA endonuclease activity / transcription antitermination / DNA-templated transcription termination / maintenance of translational fidelity / mRNA 5'-UTR binding / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding / ribosome binding / regulation of translation / ribosomal small subunit assembly / small ribosomal subunit / cytosolic small ribosomal subunit / cytoplasmic translation / tRNA binding / molecular adaptor activity / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / zinc ion binding / membrane / cytosol / cytoplasm
Similarity search - Function
Translation initiation factor 3, conserved site / Initiation factor 3 signature. / Translation initiation factor 3, C-terminal / Translation initiation factor IF-3, C-terminal domain / 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 / Ribosomal protein S21, conserved site ...Translation initiation factor 3, conserved site / Initiation factor 3 signature. / Translation initiation factor 3, C-terminal / Translation initiation factor IF-3, C-terminal domain / 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 / Ribosomal protein S21, conserved site / Ribosomal protein S21 signature. / Ribosomal protein S21 superfamily / Ribosomal protein S21 / Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Ribosomal protein S21 / Ribosomal protein S6, conserved site / Ribosomal protein S6 signature. / Ribosomal protein S11, bacterial-type / Ribosomal protein S20 / Ribosomal protein S20 superfamily / Ribosomal protein S20 / Ribosomal protein S4, bacterial-type / 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 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 / : / Ribosomal protein S5, N-terminal, conserved site / Ribosomal protein S5 signature. / Ribosomal protein S5 / Ribosomal protein S17, conserved site / Ribosomal protein S17 signature. / S5 double stranded RNA-binding domain profile. / Ribosomal protein S5, N-terminal / Ribosomal protein S5, N-terminal domain / Ribosomal protein S5, C-terminal / Ribosomal protein S5, C-terminal domain / 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 S4/S9 / Ribosomal protein S8 / Ribosomal protein S8 superfamily / Ribosomal protein S8 / S4 RNA-binding domain profile. / Ribosomal S11, conserved site / Ribosomal protein S11 signature. / Ribosomal protein S11 / S4 RNA-binding domain / S4 domain / Ribosomal protein S11 / RNA-binding S4 domain / RNA-binding S4 domain superfamily / Ribosomal protein S12 signature. / Ribosomal protein S12/S23 / Ribosomal protein S12/S23 / Ribosomal protein S17/S11 / Ribosomal protein S17 / Ribosomal protein S15 / Ribosomal_S15 / Ribosomal protein S15 / 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
Translation initiation factor IF-3 / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein bS16 / Small ribosomal subunit protein bS18 / Small ribosomal subunit protein bS20 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein uS8 ...Translation initiation factor IF-3 / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein bS16 / Small ribosomal subunit protein bS18 / Small ribosomal subunit protein bS20 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein uS17 / Small ribosomal subunit protein bS21
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.4 Å
AuthorsUday AB / Mishra RK / Hussain T
Funding support United Kingdom, 1 items
OrganizationGrant numberCountry
Wellcome Trust United Kingdom
CitationJournal: Proteins / Year: 2023
Title: Initiation factor 3 bound to the 30S ribosomal subunit in an initial step of translation.
Authors: Adwaith B Uday / Rishi Kumar Mishra / Tanweer Hussain /
Abstract: Bacterial ribosomes require three initiation factors IF1, IF2, and IF3 during the initial steps of translation. These IFs ensure correct base pairing of the initiator tRNA anticodon with the start ...Bacterial ribosomes require three initiation factors IF1, IF2, and IF3 during the initial steps of translation. These IFs ensure correct base pairing of the initiator tRNA anticodon with the start codon in the mRNA located at the P-site of the 30S ribosomal subunit. IF3 is one of the first IFs to bind to the 30S and plays a crucial role in the selection of the correct start codon and codon: anticodon base pairing. IF3 also prevents the premature association of the 50S subunit of ribosomes and aids in ribosome recycling. IF3 is reported to change binding sites and conformation to ensure translation initiation fidelity. A recent study suggested an initial binding of IF3 CTD away from the P-site and that IF1 and IF2 promote the movement of CTD to the P-site and concomitant movement of NTD. Hence, to visualize the position of IF3 in the absence of any other IFs, we determined cryo-EM structure of the 30S-IF3 complex. The map shows that IF3 is present in an extended conformation with CTD present at the P-site and NTD near the platform even in the absence of IF1 and IF2. Hence, IF3 CTD binds at the P-site and moves away during the accommodation of the initiator tRNA at the P-site in the later steps of translation initiation. Overall, we report the structure of 30S-IF3 which demystifies the starting binding site and conformation of IF3 on the 30S ribosomal subunit.
History
DepositionJun 20, 2023-
Header (metadata) releaseJan 24, 2024-
Map releaseJan 24, 2024-
UpdateJan 24, 2024-
Current statusJan 24, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_36620.png

Downloads & links

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Map

FileDownload / File: emd_36620.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMap of the 30S-body and IF3 complex
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.2 Å/pix.
x 320 pix.
= 384. Å		1.2 Å/pix.
x 320 pix.
= 384. Å		1.2 Å/pix.
x 320 pix.
= 384. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.2 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0078
Minimum - Maximum-0.0019491398 - 0.02479602
Average (Standard dev.)0.00014003472 (±0.0013430344)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 384.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_36620_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map 1

Fileemd_36620_half_map_1.map
AnnotationHalf map 1
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map 2

Fileemd_36620_half_map_2.map
AnnotationHalf map 2
Projections & Slices
AxesZYX

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Slices (1/2)
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Histogram

Histogram (log scale)

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Sample components

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Entire : Complex of the small ribosomal subunit (30S) body and Translation...

EntireName: Complex of the small ribosomal subunit (30S) body and Translation initiation factor 3 (IF3) in Escherichia coli
Components
  • Complex: Complex of the small ribosomal subunit (30S) body and Translation initiation factor 3 (IF3) in Escherichia coli
    • Organelle or cellular component: Initiation factor 3
      • Protein or peptide: Translation initiation factor IF-3
    • Organelle or cellular component: Body of the 30S subunit of ribosome
      • Protein or peptide: 30S ribosomal protein S18
      • Protein or peptide: 30S ribosomal protein S21
      • Protein or peptide: 30S ribosomal protein S20
      • Protein or peptide: 30S ribosomal protein S17
      • RNA: 16S ribosomal RNA
      • Protein or peptide: 30S ribosomal protein S5
      • Protein or peptide: 30S ribosomal protein S4
      • Protein or peptide: 30S ribosomal protein S6, fully modified isoform
      • Protein or peptide: 30S ribosomal protein S8
      • Protein or peptide: Small ribosomal subunit protein uS11
      • Protein or peptide: Small ribosomal subunit protein uS12
      • Protein or peptide: 30S ribosomal protein S15
      • Protein or peptide: 30S ribosomal protein S16

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Supramolecule #1: Complex of the small ribosomal subunit (30S) body and Translation...

SupramoleculeName: Complex of the small ribosomal subunit (30S) body and Translation initiation factor 3 (IF3) in Escherichia coli
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#14
Source (natural)Organism: Escherichia coli (E. coli)

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Supramolecule #2: Initiation factor 3

SupramoleculeName: Initiation factor 3 / type: organelle_or_cellular_component / ID: 2 / Parent: 1 / Macromolecule list: #14
Source (natural)Organism: Escherichia coli (E. coli)

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Supramolecule #3: Body of the 30S subunit of ribosome

SupramoleculeName: Body of the 30S subunit of ribosome / type: organelle_or_cellular_component / ID: 3 / Parent: 1 / Macromolecule list: #1-#13

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Macromolecule #1: 30S ribosomal protein S18

MacromoleculeName: 30S ribosomal protein S18 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 9.005472 KDa
SequenceString:
MARYFRRRKF CRFTAEGVQE IDYKDIATLK NYITESGKIV PSRITGTRAK YQRQLARAIK RARYLSLLPY TDRHQ

UniProtKB: Small ribosomal subunit protein bS18

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Macromolecule #2: 30S ribosomal protein S21

MacromoleculeName: 30S ribosomal protein S21 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 8.524039 KDa
SequenceString:
MPVIKVRENE PFDVALRRFK RSCEKAGVLA EVRRREFYEK PTTERKRAKA SAVKRHAKKL ARENARRTRL Y

UniProtKB: Small ribosomal subunit protein bS21

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Macromolecule #3: 30S ribosomal protein S20

MacromoleculeName: 30S ribosomal protein S20 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 9.708464 KDa
SequenceString:
MANIKSAKKR AIQSEKARKH NASRRSMMRT FIKKVYAAIE AGDKAAAQKA FNEMQPIVDR QAAKGLIHKN KAARHKANLT AQINKLA

UniProtKB: Small ribosomal subunit protein bS20

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Macromolecule #4: 30S ribosomal protein S17

MacromoleculeName: 30S ribosomal protein S17 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 9.724491 KDa
SequenceString:
MTDKIRTLQG RVVSDKMEKS IVVAIERFVK HPIYGKFIKR TTKLHVHDEN NECGIGDVVE IRECRPLSKT KSWTLVRVVE KAVL

UniProtKB: Small ribosomal subunit protein uS17

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Macromolecule #6: 30S ribosomal protein S5

MacromoleculeName: 30S ribosomal protein S5 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 17.629398 KDa
SequenceString:
MAHIEKQAGE LQEKLIAVNR VSKTVKGGRI FSFTALTVVG DGNGRVGFGY GKAREVPAAI QKAMEKARRN MINVALNNGT LQHPVKGVH TGSRVFMQPA SEGTGIIAGG AMRAVLEVAG VHNVLAKAYG STNPINVVRA TIDGLENMNS PEMVAAKRGK S VEEILGK

UniProtKB: Small ribosomal subunit protein uS5

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Macromolecule #7: 30S ribosomal protein S4

MacromoleculeName: 30S ribosomal protein S4 / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 23.514199 KDa
SequenceString: MARYLGPKLK LSRREGTDLF LKSGVRAIDT KCKIEQAPGQ HGARKPRLSD YGVQLREKQK VRRIYGVLER QFRNYYKEAA RLKGNTGEN LLALLEGRLD NVVYRMGFGA TRAEARQLVS HKAIMVNGRV VNIASYQVSP NDVVSIREKA KKQSRVKAAL E LAEQREKP ...String:
MARYLGPKLK LSRREGTDLF LKSGVRAIDT KCKIEQAPGQ HGARKPRLSD YGVQLREKQK VRRIYGVLER QFRNYYKEAA RLKGNTGEN LLALLEGRLD NVVYRMGFGA TRAEARQLVS HKAIMVNGRV VNIASYQVSP NDVVSIREKA KKQSRVKAAL E LAEQREKP TWLEVDAGKM EGTFKRKPER SDLSADINEH LIVELYSK

UniProtKB: Small ribosomal subunit protein uS4

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Macromolecule #8: 30S ribosomal protein S6, fully modified isoform

MacromoleculeName: 30S ribosomal protein S6, fully modified isoform / type: protein_or_peptide / ID: 8 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 15.727512 KDa
SequenceString:
MRHYEIVFMV HPDQSEQVPG MIERYTAAIT GAEGKIHRLE DWGRRQLAYP INKLHKAHYV LMNVEAPQEV IDELETTFRF NDAVIRSMV MRTKHAVTEA SPMVKAKDER RERRDDFANE TADDAEAGDS EEEEEE

UniProtKB: Small ribosomal subunit protein bS6

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Macromolecule #9: 30S ribosomal protein S8

MacromoleculeName: 30S ribosomal protein S8 / type: protein_or_peptide / ID: 9 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 14.146557 KDa
SequenceString:
MSMQDPIADM LTRIRNGQAA NKAAVTMPSS KLKVAIANVL KEEGFIEDFK VEGDTKPELE LTLKYFQGKA VVESIQRVSR PGLRIYKRK DELPKVMAGL GIAVVSTSKG VMTDRAARQA GLGGEIICYV A

UniProtKB: Small ribosomal subunit protein uS8

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Macromolecule #10: Small ribosomal subunit protein uS11

MacromoleculeName: Small ribosomal subunit protein uS11 / type: protein_or_peptide / ID: 10 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 13.870975 KDa
SequenceString:
MAKAPIRARK RVRKQVSDGV AHIHASFNNT IVTITDRQGN ALGWATAGGS GFRGSRKSTP FAAQVAAERC ADAVKEYGIK NLEVMVKGP GPGRESTIRA LNAAGFRITN ITDVTPIPHN GCRPPKKRRV

UniProtKB: Small ribosomal subunit protein uS11

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Macromolecule #11: Small ribosomal subunit protein uS12

MacromoleculeName: Small ribosomal subunit protein uS12 / type: protein_or_peptide / ID: 11 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 13.768157 KDa
SequenceString:
MATVNQLVRK PRARKVAKSN VPALEACPQK RGVCTRVYTT TPKKPNSALR KVCRVRLTNG FEVTSYIGGE GHNLQEHSVI LIRGGRVKD LPGVRYHTVR GALDCSGVKD RKQARSKYGV KRPKA

UniProtKB: Small ribosomal subunit protein uS12

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Macromolecule #12: 30S ribosomal protein S15

MacromoleculeName: 30S ribosomal protein S15 / type: protein_or_peptide / ID: 12 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 10.290816 KDa
SequenceString:
MSLSTEATAK IVSEFGRDAN DTGSTEVQVA LLTAQINHLQ GHFAEHKKDH HSRRGLLRMV SQRRKLLDYL KRKDVARYTQ LIERLGLRR

UniProtKB: Small ribosomal subunit protein uS15

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Macromolecule #13: 30S ribosomal protein S16

MacromoleculeName: 30S ribosomal protein S16 / type: protein_or_peptide / ID: 13 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 9.207572 KDa
SequenceString:
MVTIRLARHG AKKRPFYQVV VADSRNARNG RFIERVGFFN PIASEKEEGT RLDLDRIAHW VGQGATISDR VAALIKEVNK AA

UniProtKB: Small ribosomal subunit protein bS16

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Macromolecule #14: Translation initiation factor IF-3

MacromoleculeName: Translation initiation factor IF-3 / type: protein_or_peptide / ID: 14 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 20.600994 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
MKGGKRVQTA RPNRINGEIR AQEVRLTGLE GEQLGIVSLR EALEKAEEAG VDLVEISPNA EPPVCRIMDY GKFLYEKSKS SKEQKKKQK VIQVKEIKFR PGTDEGDYQV KLRSLIRFLE EGDKAKITLR FRGREMAHQQ IGMEVLNRVK DDLQELAVVE S FPTKIEGR QMIMVLAPKK KQ

UniProtKB: Translation initiation factor IF-3

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Macromolecule #5: 16S ribosomal RNA

MacromoleculeName: 16S ribosomal RNA / type: rna / ID: 5 / Details: truncated version of 16S rRNA (2-922, 1540) / Number of copies: 1
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 498.725406 KDa
SequenceString: AAUUGAAGAG UUUGAUCAUG GCUCAGAUUG AACGCUGGCG GCAGGCCUAA CACAUGCAAG UCGAACGGUA ACAGGAAGAA GCUUGCUUC UUUGCUGACG AGUGGCGGAC GGGUGAGUAA UGUCUGGGAA ACUGCCUGAU GGAGGGGGAU AACUACUGGA A ACGGUAGC ...String:
AAUUGAAGAG UUUGAUCAUG GCUCAGAUUG AACGCUGGCG GCAGGCCUAA CACAUGCAAG UCGAACGGUA ACAGGAAGAA GCUUGCUUC UUUGCUGACG AGUGGCGGAC GGGUGAGUAA UGUCUGGGAA ACUGCCUGAU GGAGGGGGAU AACUACUGGA A ACGGUAGC UAAUACCGCA UAACGUCGCA AGACCAAAGA GGGGGACCUU CGGGCCUCUU GCCAUCGGAU GUGCCCAGAU GG GAUUAGC UAGUAGGUGG GGUAACGGCU CACCUAGGCG ACGAUCCCUA GCUGGUCUGA GAGGAUGACC AGCCACACUG GAA CUGAGA CACGGUCCAG ACUCCUACGG GAGGCAGCAG UGGGGAAUAU UGCACAAUGG GCGCAAGCCU GAUGCAGCCA UGCC GCGUG UAUGAAGAAG GCCUUCGGGU UGUAAAGUAC UUUCAGCGGG GAGGAAGGGA GUAAAGUUAA UACCUUUGCU CAUUG ACGU UACCCGCAGA AGAAGCACCG GCUAACUCCG UGCCAGCAGC CGCGGUAAUA CGGAGGGUGC AAGCGUUAAU CGGAAU UAC UGGGCGUAAA GCGCACGCAG GCGGUUUGUU AAGUCAGAUG UGAAAUCCCC GGGCUCAACC UGGGAACUGC AUCUGAU AC UGGCAAGCUU GAGUCUCGUA GAGGGGGGUA GAAUUCCAGG UGUAGCGGUG AAAUGCGUAG AGAUCUGGAG GAAUACCG G UGGCGAAGGC GGCCCCCUGG ACGAAGACUG ACGCUCAGGU GCGAAAGCGU GGGGAGCAAA CAGGAUUAGA UACCCUGGU AGUCCACGCC GUAAACGAUG UCGACUUGGA GGUUGUGCCC UUGAGGCGUG GCUUCCGGAG CUAACGCGUU AAGUCGACCG CCUGGGGAG UACGGCCGCA AGGUUAAAAC UCAAAUGAAU UGACGGGGGC CCGCACAAGC GGUGGAGCAU GUGGUUUAAU U CGAUGCAA CGCGAAGAAC CUUACCUGGU CUUGACAUCC ACGGAAGUUU UCAGAGAUGA GAAUGUGCCU UCGGGAACCG UG AGACAGG UGCUGCAUGG CUGUCGUCAG CUCGUGUUGU GAAAUGUUGG GUUAAGUCCC GCAACGAGCG CAACCCUUAU CCU UUGUUG CCAGCGGUCC GGCCGGGAAC UCAAAGGAGA CUGCCAGUGA UAAACUGGAG GAAGGUGGGG AUGACGUCAA GUCA UCAUG GCCCUUACGA CCAGGGCUAC ACACGUGCUA CAAUGGCGCA UACAAAGAGA AGCGACCUCG CGAGAGCAAG CGGAC CUCA UAAAGUGCGU CGUAGUCCGG AUUGGAGUCU GCAACUCGAC UCCAUGAAGU CGGAAUCGCU AGUAAUCGUG GAUCAG AAU GCCACGGUGA AUACGUUCCC GGGCCUUGUA CACACCGCCC GUCACACCAU GGGAGUGGGU UGCAAAAGAA GUAGGUA GC UUAACCUUCG GGAGGGCGCU UACCACUUUG UGAUUCAUGA CUGGGGUGAA GUCGUAACAA GGUAACCGUA GGGGAACC U GCGGUUGGAU CACCUCCU

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
Component:
ConcentrationFormulaName
5.0 mMC8H19KN2O5SHEPES-KOH
10.0 mMMg(CH3COO)2Magnesium acetate
50.0 mMKClPottasium chloride
10.0 mMNH4ClAmmonium chloride
6.0 mMC2H6OSBeta-mercaptoethanol
GridMaterial: COPPER / Support film - Material: CARBON / Support film - topology: CONTINUOUS
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Number grids imaged: 2 / Number real images: 4564 / Average electron dose: 60.0 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: OTHER / Cs: 2.7 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.5 µm / Nominal magnification: 45000
Sample stageCooling holder cryogen: NITROGEN
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6o7k

Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.4 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 145664
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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