5LMQ

Structure of bacterial 30S-IF1-IF3-mRNA-tRNA translation pre-initiation complex, open form (state-2A)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Large-Scale Movements of IF3 and tRNA during Bacterial Translation Initiation.

Hussain, T., Llacer, J.L., Wimberly, B.T., Kieft, J.S., Ramakrishnan, V.

(2016) Cell 167: 133-144.e13

  • DOI: https://doi.org/10.1016/j.cell.2016.08.074
  • Primary Citation of Related Structures:  
    5LMN, 5LMO, 5LMP, 5LMQ, 5LMR, 5LMS, 5LMT, 5LMU, 5LMV

  • PubMed 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 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.

    • Organizational Affiliation: 

    MRC Laboratory of Molecular Biology, Cambridge CB2 0QH, UK.


Macromolecules

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S2256Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S3239Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S4209Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S5162Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S6101Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S7156Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S8138Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S9128Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S10105Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S11129Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S12132Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S13126Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S14 type Z61Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S1589Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 16
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S1688Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 17
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S17105Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 18
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S1888Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 19
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S1993Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 20
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S20106Thermus thermophilus HB8Mutation(s): 0 
UniProt
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Entity ID: 21
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein ThxU [auth V]27Thermus thermophilus HB8Mutation(s): 0 
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Entity ID: 22
MoleculeChains Sequence LengthOrganismDetailsImage
Translation initiation factor IF-1V [auth W]72Thermus thermophilus HB8Mutation(s): 0 
Gene Names: infA, TTHA1669
UniProt
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Entity ID: 23
MoleculeChains Sequence LengthOrganismDetailsImage
Translation initiation factor IF-3W [auth X]171Thermus thermophilus HB8Mutation(s): 0 
Gene Names: infC, TTHA0551
UniProt
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Entity ID: 1
MoleculeChains LengthOrganismImage
16S rRNA1,522Thermus thermophilus HB8
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Entity ID: 24
MoleculeChains LengthOrganismImage
mRNAX [auth Y]42Thermus thermophilus HB8
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Entity ID: 25
MoleculeChains LengthOrganismImage
tRNAY [auth Z]77Escherichia coli
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Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN
Download Ideal Coordinates CCD File 
KC [auth D],
LC [auth N]		ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
MG
Query on MG
Download Ideal Coordinates CCD File 
AA [auth A]
AB [auth A]
AC [auth A]
BA [auth A]
BB [auth A]
AA [auth A],
AB [auth A],
AC [auth A],
BA [auth A],
BB [auth A],
BC [auth A],
CA [auth A],
CB [auth A],
CC [auth A],
DA [auth A],
DB [auth A],
DC [auth A],
EA [auth A],
EB [auth A],
EC [auth A],
FA [auth A],
FB [auth A],
FC [auth A],
GA [auth A],
GB [auth A],
GC [auth A],
HA [auth A],
HB [auth A],
HC [auth A],
IA [auth A],
IB [auth A],
IC [auth A],
JA [auth A],
JB [auth A],
JC [auth A],
KA [auth A],
KB [auth A],
LA [auth A],
LB [auth A],
MA [auth A],
MB [auth A],
MC [auth W],
NA [auth A],
NB [auth A],
OA [auth A],
OB [auth A],
PA [auth A],
PB [auth A],
QA [auth A],
QB [auth A],
RA [auth A],
RB [auth A],
SA [auth A],
SB [auth A],
TA [auth A],
TB [auth A],
UA [auth A],
UB [auth A],
VA [auth A],
VB [auth A],
WA [auth A],
WB [auth A],
XA [auth A],
XB [auth A],
YA [auth A],
YB [auth A],
Z [auth A],
ZA [auth A],
ZB [auth A]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION1.4
MODEL REFINEMENTREFMAC5.8

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-05
    Type: Initial release
  • Version 1.1: 2017-08-02
    Changes: Data collection, Derived calculations
  • Version 1.2: 2019-12-11
    Changes: Advisory, Derived calculations, Other
  • Version 1.3: 2024-10-16
    Changes: Data collection, Database references, Derived calculations, Structure summary