4FIN

Crystal Structure of EttA (formerly YjjK) - an E. coli ABC-type ATPase

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 

wwPDB Validation   3D Report Full Report


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


Literature

The ABC-F protein EttA gates ribosome entry into the translation elongation cycle.

Boel, G., Smith, P.C., Ning, W., Englander, M.T., Chen, B., Hashem, Y., Testa, A.J., Fischer, J.J., Wieden, H.J., Frank, J., Gonzalez, R.L., Hunt, J.F.

(2014) Nat Struct Mol Biol 21: 143-151

  • DOI: 10.1038/nsmb.2740
  • Primary Citation of Related Structures:  
    4FIN

  • PubMed Abstract: 

    • ABC-F proteins have evaded functional characterization even though they compose one of the most widely distributed branches of the ATP-binding cassette (ABC) superfamily. Herein, we demonstrate that YjjK, the most prevalent eubacterial ABC-F protein, gates ribosome entry into the translation elongation cycle through a nucleotide-dependent interaction sensitive to ATP/ADP ratio ...

    ABC-F proteins have evaded functional characterization even though they compose one of the most widely distributed branches of the ATP-binding cassette (ABC) superfamily. Herein, we demonstrate that YjjK, the most prevalent eubacterial ABC-F protein, gates ribosome entry into the translation elongation cycle through a nucleotide-dependent interaction sensitive to ATP/ADP ratio. Accordingly, we rename this protein energy-dependent translational throttle A (EttA). We determined the crystal structure of Escherichia coli EttA and used it to design mutants for biochemical studies including enzymological assays of the initial steps of protein synthesis. These studies suggest that EttA may regulate protein synthesis in energy-depleted cells, which have a low ATP/ADP ratio. Consistently with this inference, EttA-deleted cells exhibit a severe fitness defect in long-term stationary phase. These studies demonstrate that an ABC-F protein regulates protein synthesis via a new mechanism sensitive to cellular energy status.

    Organizational Affiliation: 

    1] Department of Biological Sciences, Columbia University, New York, New York, USA. [2] Northeast Structural Genomics Consortium, Columbia University, New York, New York, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EttA (YjjK) ABCF family proteinA, B555Escherichia coli K-12Mutation(s): 0 
Gene Names: b4391, JW4354, yjjK, ettA
EC: 3.6.1
Find proteins for P0A9W3 (Escherichia coli (strain K12))
Explore P0A9W3 
Go to UniProtKB:  P0A9W3
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CIT
Query on CIT
Download Ideal Coordinates CCD File 
 H [auth A]CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N		 Ligand Interaction
PGE
Query on PGE
Download Ideal Coordinates CCD File 
 I [auth A]TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N		 Ligand Interaction
SO4
Query on SO4
Download Ideal Coordinates CCD File 
C [auth A] , D [auth A] , E [auth A] , F [auth A] , G [auth A] , N [auth B] , O [auth B] , P [auth B] , 
C [auth A],  D [auth A],  E [auth A],  F [auth A],  G [auth A],  N [auth B],  O [auth B],  P [auth B],  Q [auth B],  R [auth B],  S [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
GOL
Query on GOL
Download Ideal Coordinates CCD File 
J [auth A] , K [auth A] , L [auth A] , M [auth A] , T [auth B] , U [auth B] , V [auth B] , W [auth B] , 
J [auth A],  K [auth A],  L [auth A],  M [auth A],  T [auth B],  U [auth B],  V [auth B],  W [auth B],  X [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE		A, BL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.363α = 90
b = 233.474β = 91.29
c = 54.089γ = 90
Software Package:
Software NamePurpose
CBASSdata collection
SOLVEphasing
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-07-03
    Type: Initial release
  • Version 1.1: 2013-12-04
    Changes: Structure summary
  • Version 1.2: 2014-01-08
    Changes: Database references
  • Version 1.3: 2014-03-05
    Changes: Database references