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- PDB-9uzk: EMCV IRES captured on mammalian 40S with initiator tRNA -

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Basic information

Entry
Database: PDB / ID: 9uzk
TitleEMCV IRES captured on mammalian 40S with initiator tRNA
Components
  • (Small ribosomal subunit protein ...) x 31
  • 18S ribosomal RNA
  • 40S ribosomal protein S24
  • EMCV IRES
  • Initiator tRNA
  • Ribosomal protein S14
  • Ubiquitin-ribosomal protein eS31 fusion protein
KeywordsRIBOSOME / EMCV IRES / 40S ribosome / 48S PIC
Function / homology
Function and homology information


laminin receptor activity / ubiquitin ligase inhibitor activity / 90S preribosome / positive regulation of signal transduction by p53 class mediator / phagocytic cup / translation regulator activity / gastrulation / rough endoplasmic reticulum / ribosomal small subunit export from nucleus / laminin binding ...laminin receptor activity / ubiquitin ligase inhibitor activity / 90S preribosome / positive regulation of signal transduction by p53 class mediator / phagocytic cup / translation regulator activity / gastrulation / rough endoplasmic reticulum / ribosomal small subunit export from nucleus / laminin binding / MDM2/MDM4 family protein binding / class I DNA-(apurinic or apyrimidinic site) endonuclease activity / positive regulation of apoptotic signaling pathway / DNA-(apurinic or apyrimidinic site) lyase / cytosolic ribosome / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / small-subunit processome / spindle / rRNA processing / rhythmic process / regulation of translation / ribosomal small subunit assembly / virus receptor activity / ribosome binding / ribosomal small subunit biogenesis / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / perikaryon / cytoplasmic translation / cell differentiation / mitochondrial inner membrane / postsynaptic density / rRNA binding / structural constituent of ribosome / ribosome / translation / ribonucleoprotein complex / cell division / DNA repair / mRNA binding / apoptotic process / centrosome / dendrite / synapse / nucleolus / perinuclear region of cytoplasm / DNA-templated transcription / DNA binding / RNA binding / zinc ion binding / nucleus / plasma membrane / cytoplasm
Similarity search - Function
40S ribosomal protein SA / 40S ribosomal protein SA, C-terminal domain / 40S ribosomal protein SA C-terminus / Ubiquitin-like protein FUBI / : / Ribosomal protein S26e signature. / Ribosomal protein L41 / Ribosomal protein L41 / Ribosomal protein S21e, conserved site / Ribosomal protein S21e signature. ...40S ribosomal protein SA / 40S ribosomal protein SA, C-terminal domain / 40S ribosomal protein SA C-terminus / Ubiquitin-like protein FUBI / : / Ribosomal protein S26e signature. / Ribosomal protein L41 / Ribosomal protein L41 / Ribosomal protein S21e, conserved site / Ribosomal protein S21e signature. / : / Ribosomal protein S12e signature. / Ribosomal protein S26e / Ribosomal protein S26e superfamily / Ribosomal protein S26e / Ribosomal protein S12e / Small (40S) ribosomal subunit Asc1/RACK1 / Ribosomal protein S19e, conserved site / Ribosomal protein S19e signature. / Ribosomal protein S21e / Ribosomal protein S21e superfamily / Ribosomal protein S21e / Ribosomal protein S2, eukaryotic / 40S Ribosomal protein S10 / S27a-like superfamily / Plectin/S10, N-terminal / Plectin/S10 domain / Ribosomal protein S10, eukaryotic/archaeal / Ribosomal protein S30 / Ribosomal protein S30 / : / Ribosomal protein S17e, conserved site / Ribosomal protein S17e signature. / Ribosomal protein S7e signature. / Ribosomal protein S27a / Ribosomal protein S27a / Ribosomal protein S27a / Ribosomal protein S2, eukaryotic/archaeal / 40S ribosomal protein S29/30S ribosomal protein S14 type Z / Ribosomal protein S3, eukaryotic/archaeal / Ribosomal protein S3Ae, conserved site / Ribosomal protein S3Ae signature. / Ribosomal protein S27e signature. / 40S ribosomal protein S4, C-terminal domain / 40S ribosomal protein S4 C-terminus / Ribosomal protein S19A/S15e / Ribosomal protein S19e / Ribosomal protein S19e / Ribosomal_S19e / Ribosomal protein S4e, N-terminal, conserved site / Ribosomal protein S4e signature. / Ribosomal protein S17e / Ribosomal protein S17e-like superfamily / Ribosomal S17 / Ribosomal protein S6, eukaryotic / 40S ribosomal protein S1/3, eukaryotes / 40S ribosomal protein S11, N-terminal / Ribosomal_S17 N-terminal / Ribosomal protein S7e / Ribosomal protein S7e / : / Ribosomal S24e conserved site / Ribosomal protein S24e signature. / Ribosomal protein S4e, N-terminal / RS4NT (NUC023) domain / Ribosomal protein S4, KOW domain / Ribosomal protein S4e / Ribosomal protein S4e, central region / Ribosomal protein S4e, central domain superfamily / Ribosomal family S4e / Ribosomal protein S28e conserved site / Ribosomal protein S28e signature. / Ribosomal protein S6/S6e/A/B/2, conserved site / Ribosomal protein S17, archaeal/eukaryotic / Ribosomal protein S6e signature. / Ribosomal protein S23, eukaryotic/archaeal / Ribosomal protein S27 / Ribosomal protein S24e / Ribosomal protein S27, zinc-binding domain superfamily / Ribosomal protein S24e / Ribosomal protein S27 / Ribosomal protein S28e / Ribosomal protein S28e / Ribosomal protein S3Ae / Ribosomal S3Ae family / Ribosomal S3Ae family / Ribosomal protein S5/S7, eukaryotic/archaeal / Ribosomal protein S6e / Ribosomal protein S6e / Ribosomal protein S6e / Ribosomal protein S13/S15, N-terminal / Ribosomal protein S15P / Ribosomal S13/S15 N-terminal domain / Ribosomal S13/S15 N-terminal domain / Ribosomal protein S4/S9, eukaryotic/archaeal / Ribosomal protein S14/S29 / Ribosomal protein L7Ae/L30e/S12e/Gadd45 / Ribosomal protein L7Ae/L30e/S12e/Gadd45 family / 50S ribosomal protein L30e-like / :
Similarity search - Domain/homology
: / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein eS32 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein eS10 / Small ribosomal subunit protein uS4 ...: / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein eS32 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein eS10 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein eS12 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS10 / Small ribosomal subunit protein RACK1 / Ubiquitin-ribosomal protein eS31 fusion protein / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein eS7 / Small ribosomal subunit protein uS12 / Ubiquitin-like FUBI-ribosomal protein eS30 fusion protein / Small ribosomal subunit protein eS26 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein eS28 / Small ribosomal subunit protein eS4 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein eS6 / Small ribosomal subunit protein eS21 / Small ribosomal subunit protein eS19 / Small ribosomal subunit protein eS1 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS17 / 40S ribosomal protein S24 / Small ribosomal subunit protein eS17 / Small ribosomal subunit protein eS27 / Small ribosomal subunit protein uS19 / Small ribosomal subunit protein uS14
Similarity search - Component
Biological speciesEncephalomyocarditis virus
Oryctolagus cuniculus (rabbit)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.6 Å
AuthorsDas, D. / Hussain, T.
Funding support India, 1items
OrganizationGrant numberCountry
Other governmentIA/I/17/2/503313 India
Citation
Journal: Elife / Year: 2026
Title: Structural insights into the recruitment of viral type 2 IRES to ribosomal preinitiation complex for protein synthesis.
Authors: Deepakash Das / Tanweer Hussain /
Abstract: Picornaviruses employ internal ribosome entry sites (IRESs) in their genomic RNA to hijack the host's translational machinery. The picornavirus, encephalomyocarditis virus, employs a type 2 IRES ...Picornaviruses employ internal ribosome entry sites (IRESs) in their genomic RNA to hijack the host's translational machinery. The picornavirus, encephalomyocarditis virus, employs a type 2 IRES present in its 5' untranslated region (5'UTR) and requires 43S ribosomal preinitiation complex (PIC), the central domain of eukaryotic initiation factor (eIF) 4G, eIF4A, and an essential ITAF (IRES trans-acting factor)-polypyrimidine tract binding protein 1 (PTB1) to form 48S PIC. In this study, we have used cryo-electron microscopy (cryo-EM) to determine the structure of encephalomyocarditis virus (EMCV) IRES-bound mammalian 48S PIC in a scanning-arrested closed state at the start codon. The EMCV IRES domains contact initiator tRNA (tRNA) and 40S head at the inter-subunit interface, which reveals an altogether unique mechanism used by viruses to capture host translational machinery for its protein synthesis. The tRNA is held away from the 40S body in contrast to canonical cap-dependent translation while the domain I apical region of EMCV IRES mimics 28S rRNA of 60S to interact with 40S ribosomal head proteins uS13 and uS19. The structural analysis accounts for numerous previously reported biochemical studies on type 2 IRES and shows how type 2 IRES interacts with 43S PIC to form 48S PIC. This study provides mechanistic insights for understanding EMCV IRES-mediated translation initiation, which could be extrapolated to other IRESs sharing similar motifs and factor requirements, including type 1 viral IRESs.
#1: Journal: Elife / Year: 2026
Title: Structural insights into the recruitment of viral Type 2 IRES to ribosomal preinitiation complex for protein synthesis
Authors: Das, D. / Hussain, T.
History
DepositionMay 16, 2025Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0May 27, 2026Provider: repository / Type: Initial release
Revision 1.0May 27, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
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Revision 1.1Jul 8, 2026Group: Data collection / Database references / Category: citation / citation_author / em_admin / Item: _em_admin.last_update
Revision 1.1Jul 8, 2026Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Database references / Experimental summary / Data content type: EM metadata / EM metadata / EM metadata / Category: citation / citation_author / em_admin / Data content type: EM metadata / Item: _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
2: 18S ribosomal RNA
C: Small ribosomal subunit protein uS2
D: Small ribosomal subunit protein eS1
E: Small ribosomal subunit protein uS5
F: Small ribosomal subunit protein uS3
G: Small ribosomal subunit protein eS4
H: Small ribosomal subunit protein uS7
I: Small ribosomal subunit protein eS6
J: Small ribosomal subunit protein eS7
K: Small ribosomal subunit protein eS8
L: Small ribosomal subunit protein uS4
M: Small ribosomal subunit protein eS10
N: Small ribosomal subunit protein uS17
O: Small ribosomal subunit protein eS12
P: Small ribosomal subunit protein uS15
Q: Ribosomal protein S14
R: Small ribosomal subunit protein uS19
S: Small ribosomal subunit protein uS9
T: Small ribosomal subunit protein eS17
U: Small ribosomal subunit protein uS13
V: Small ribosomal subunit protein eS19
W: Small ribosomal subunit protein uS10
X: Small ribosomal subunit protein eS21
Y: Small ribosomal subunit protein uS8
Z: Small ribosomal subunit protein uS12
a: 40S ribosomal protein S24
b: Small ribosomal subunit protein eS26
c: Small ribosomal subunit protein eS27
d: Small ribosomal subunit protein eS28
e: Small ribosomal subunit protein uS14
f: Ubiquitin-ribosomal protein eS31 fusion protein
g: Small ribosomal subunit protein RACK1
h: Small ribosomal subunit protein eS25
i: Small ribosomal subunit protein eS30
l: Small ribosomal subunit protein eS32
y: Initiator tRNA
z: EMCV IRES


Theoretical massNumber of molelcules
Total (without water)1,276,94537
Polymers1,276,94537
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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RNA chain , 3 types, 3 molecules 2yz

#1: RNA chain 18S ribosomal RNA


Mass: 600900.562 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / Plasmid details: Rabbit reticulocute lysate / References: GenBank: 283837872
#36: RNA chain Initiator tRNA


Mass: 24231.510 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit)
#37: RNA chain EMCV IRES


Mass: 29887.875 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Encephalomyocarditis virus / Production host: Escherichia coli (E. coli) / Strain (production host): BL21 / References: GenBank: 485965777

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Small ribosomal subunit protein ... , 31 types, 31 molecules CDEFGHIJKLMNOPRSTUVWXYZbcdeghil

#2: Protein Small ribosomal subunit protein uS2 / 37 kDa laminin receptor precursor / 37LRP / 37/67 kDa laminin receptor / LRP/LR / 67 kDa laminin ...37 kDa laminin receptor precursor / 37LRP / 37/67 kDa laminin receptor / LRP/LR / 67 kDa laminin receptor / 67LR / Laminin receptor 1 / LamR / Laminin-binding protein precursor p40 / LBP/p40


Mass: 32927.988 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TLT8
#3: Protein Small ribosomal subunit protein eS1


Mass: 29928.967 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TN72
#4: Protein Small ribosomal subunit protein uS5


Mass: 24814.285 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit)
#5: Protein Small ribosomal subunit protein uS3 / 40S ribosomal protein S3


Mass: 26715.344 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit)
References: UniProt: G1TNM3, DNA-(apurinic or apyrimidinic site) lyase
#6: Protein Small ribosomal subunit protein eS4 / 40S ribosomal protein S4


Mass: 29658.920 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TK17
#7: Protein Small ribosomal subunit protein uS7 / 40S ribosomal protein S5


Mass: 22913.453 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TFM5
#8: Protein Small ribosomal subunit protein eS6 / 40S ribosomal protein S6


Mass: 28751.906 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TM55
#9: Protein Small ribosomal subunit protein eS7 / 40S ribosomal protein S7


Mass: 22168.914 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1SVB0
#10: Protein Small ribosomal subunit protein eS8


Mass: 24263.387 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit)
#11: Protein Small ribosomal subunit protein uS4 / 40S ribosomal protein S9


Mass: 22641.564 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: B7NZS8
#12: Protein Small ribosomal subunit protein eS10 / 40S ribosomal protein S10


Mass: 24854.512 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: A0AAG1W9A6
#13: Protein Small ribosomal subunit protein uS17 / 40S ribosomal protein S11


Mass: 18468.826 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TRM4
#14: Protein Small ribosomal subunit protein eS12 / 40S ribosomal protein S12


Mass: 14538.987 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1SFR8
#15: Protein Small ribosomal subunit protein uS15 / 40S ribosomal protein S13


Mass: 17259.389 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1SP51
#17: Protein Small ribosomal subunit protein uS19 / 40S ribosomal protein S15


Mass: 17049.182 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1U0Q2
#18: Protein Small ribosomal subunit protein uS9 / 40S ribosomal protein S16


Mass: 16477.377 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1SGX4
#19: Protein Small ribosomal subunit protein eS17 / 40S ribosomal protein S17


Mass: 15552.119 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TU13
#20: Protein Small ribosomal subunit protein uS13 / 40S ribosomal protein S18


Mass: 17759.777 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TPG3
#21: Protein Small ribosomal subunit protein eS19 / 40S ribosomal protein S19


Mass: 15812.286 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TN62
#22: Protein Small ribosomal subunit protein uS10 / 40S ribosomal protein S20


Mass: 13398.763 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1SIZ2
#23: Protein Small ribosomal subunit protein eS21 / 40S ribosomal protein S21


Mass: 9043.276 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TM82
#24: Protein Small ribosomal subunit protein uS8 / 40S ribosomal protein S15a


Mass: 14865.555 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TG89
#25: Protein Small ribosomal subunit protein uS12 / 40S ribosomal protein S23


Mass: 15844.666 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1SZ47
#27: Protein Small ribosomal subunit protein eS26 / 40S ribosomal protein S26


Mass: 12961.455 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TFE8
#28: Protein Small ribosomal subunit protein eS27 / 40S ribosomal protein S27


Mass: 9480.186 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TZ76
#29: Protein Small ribosomal subunit protein eS28 / 40S ribosomal protein S28


Mass: 7263.394 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TIB4
#30: Protein Small ribosomal subunit protein uS14 / 40S ribosomal protein S29


Mass: 6690.821 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1U7M4
#32: Protein Small ribosomal subunit protein RACK1 / Receptor of activated protein C kinase 1


Mass: 35115.652 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1SJB4
#33: Protein Small ribosomal subunit protein eS25


Mass: 13776.224 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit)
#34: Protein Small ribosomal subunit protein eS30 / 40S ribosomal protein S30


Mass: 6741.048 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1T8A2
#35: Protein/peptide Small ribosomal subunit protein eS32 / 60S ribosomal protein L41 / Large ribosomal subunit protein eL41


Mass: 3473.451 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: A0A087WNH4

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Protein , 3 types, 3 molecules Qaf

#16: Protein Ribosomal protein S14


Mass: 18133.984 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: A0AAA9WYR1
#26: Protein 40S ribosomal protein S24


Mass: 14575.199 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1TS40
#31: Protein Ubiquitin-ribosomal protein eS31 fusion protein


Mass: 18004.041 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Oryctolagus cuniculus (rabbit) / References: UniProt: G1SK22

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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: EMCV IRES with 40S and initiator tRNA / Type: RIBOSOME
Details: EMCV IRES captured in 48S PIC using affinity-based pull-down from rabbit reticulocyte lysate
Entity ID: all / Source: NATURAL
Molecular weightExperimental value: NO
Source (natural)Organism: Oryctolagus cuniculus (rabbit)
Buffer solutionpH: 7.4
Details: 20mM HEPES, 150mM KOAc, 2mM MgCl2, 1mM DTT, 0.5mM Spermidine, 6mM GMP-PnP
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: C-flat-1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE-PROPANE / Humidity: 100 % / Chamber temperature: 289 K

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal magnification: 36000 X / Nominal defocus max: 2750 nm / Nominal defocus min: 1250 nm / Cs: 2.7 mm / C2 aperture diameter: 70 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: OTHER / Temperature (max): 83 K / Temperature (min): 77 K
Image recordingElectron dose: 55 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 6 / Num. of real images: 22549
Image scansWidth: 3838 / Height: 3710 / Movie frames/image: 20

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Processing

EM software
IDNameVersionCategory
1cryoSPARCv3.3particle selection
2Latitude3.53image acquisition
7Coot0.9.8.7model fitting
12cryoSPARCv3.33D reconstruction
13PHENIX1.2model refinement
CTF correctionType: NONE
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 4.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 55231 / Symmetry type: POINT
Atomic model building

3D fitting-ID: 1

IDPDB-IDAccession codeSource nameTypeChain-IDChain residue range
16YAN

6yan

6YANPDBexperimental model
28OZ0

8oz0

8OZ0PDBexperimental model
3AlphaFoldin silico modelz517-601

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