4A2I

Cryo-electron Microscopy Structure of the 30S Subunit in Complex with the YjeQ Biogenesis Factor


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 16.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Cryo-Electron Microscopy Structure of the 30S Subunit in Complex with the Yjeq Biogenesis Factor.

Jomaa, A.Stewart, G.Mears, J.A.Kireeva, I.Brown, E.D.Ortega, J.

(2011) RNA 17: 2026

  • DOI: 10.1261/rna.2922311
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • YjeQ is a protein broadly conserved in bacteria containing an N-terminal oligonucleotide/oligosaccharide fold (OB-fold) domain, a central GTPase domain, and a C-terminal zinc-finger domain. YjeQ binds tightly and stoichiometrically to the 30S subunit ...

    YjeQ is a protein broadly conserved in bacteria containing an N-terminal oligonucleotide/oligosaccharide fold (OB-fold) domain, a central GTPase domain, and a C-terminal zinc-finger domain. YjeQ binds tightly and stoichiometrically to the 30S subunit, which stimulates its GTPase activity by 160-fold. Despite growing evidence for the involvement of the YjeQ protein in bacterial 30S subunit assembly, the specific function and mechanism of this protein remain unclear. Here, we report the costructure of YjeQ with the 30S subunit obtained by cryo-electron microscopy. The costructure revealed that YjeQ interacts simultaneously with helix 44, the head and the platform of the 30S subunit. This binding location of YjeQ in the 30S subunit suggests a chaperone role in processing of the 3' end of the rRNA as well as in mediating the correct orientation of the main domains of the 30S subunit. In addition, the YjeQ binding site partially overlaps with the interaction site of initiation factors 2 and 3, and upon binding, YjeQ covers three inter-subunit bridges that are important for the association of the 30S and 50S subunits. Hence, our structure suggests that YjeQ may assist in ribosome maturation by preventing premature formation of the translation initiation complex and association with the 50S subunit. Together, these results support a role for YjeQ in the late stages of 30S maturation.


    Organizational Affiliation

    Department of Biochemistry and Biomedical Sciences and Michael G. DeGroote Institute for Infectious Diseases Research, McMaster University, Hamilton, Ontario, L8N3Z5, Canada.



Macromolecules

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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S10J98Escherichia coliMutation(s): 0 
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S11K117Escherichia coliMutation(s): 0 
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S12L123Escherichia coliMutation(s): 0 
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S13M114Escherichia coliMutation(s): 0 
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S14N100Escherichia coliMutation(s): 0 
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Entity ID: 15
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S15O88Escherichia coliMutation(s): 0 
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Entity ID: 16
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S16P82Escherichia coliMutation(s): 0 
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Entity ID: 17
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S17Q80Escherichia coliMutation(s): 0 
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Entity ID: 18
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S18R55Escherichia coliMutation(s): 0 
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Entity ID: 19
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S19S79Escherichia coliMutation(s): 0 
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S2B218Escherichia coliMutation(s): 0 
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Entity ID: 20
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S20T85Escherichia coliMutation(s): 0 
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Entity ID: 21
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S21U51Escherichia coliMutation(s): 0 
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Entity ID: 22
MoleculeChainsSequence LengthOrganismDetails
PUTATIVE RIBOSOME BIOGENESIS GTPASE RSGAV277Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
EC: 3.6.1
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S3C206Escherichia coliMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S4D205Escherichia coliMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S5E150Escherichia coliMutation(s): 0 
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S6F100Escherichia coliMutation(s): 0 
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S7G150Escherichia coliMutation(s): 0 
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S8H129Escherichia coliMutation(s): 0 
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
30S RIBOSOMAL PROTEIN S9I127Escherichia coliMutation(s): 0 
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Entity ID: 1
MoleculeChainsLengthOrganism
16S RIBOSOMAL RNAA1530Escherichia coli
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 16.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-02
    Type: Initial release
  • Version 1.1: 2013-07-10
    Changes: Derived calculations
  • Version 1.2: 2017-08-23
    Changes: Data collection, Derived calculations, Refinement description, Source and taxonomy, Structure summary