3FOZ

Structure of E. coli Isopentenyl-tRNA transferase in complex with E. coli tRNA(Phe)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.245 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

RNA-Protein Mutually Induced Fit: STRUCTURE OF ESCHERICHIA COLI ISOPENTENYL-tRNA TRANSFERASE IN COMPLEX WITH tRNA(Phe).

Seif, E.Hallberg, B.M.

(2009) J Biol Chem 284: 6600-6604

  • DOI: 10.1074/jbc.C800235200
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • tRNAs that read codons starting with U are usually modified at their A37 by isopentenyl-tRNA transferases to minimize peptidyl-tRNA slippage in translation. The consensus substrate requirements of the isopentenyl-tRNA transferase of Escherichia coli, ...

    tRNAs that read codons starting with U are usually modified at their A37 by isopentenyl-tRNA transferases to minimize peptidyl-tRNA slippage in translation. The consensus substrate requirements of the isopentenyl-tRNA transferase of Escherichia coli, MiaA, have been the focus of extensive study. However, the molecular basis of tRNA-MiaA recognition remains unknown. Here we describe the 2.5A crystal structure of MiaA in complex with substrate tRNA(Phe). Comparative structural analysis reveals that the enzymatic reaction involves an RNA-protein mutually induced fit mechanism in which large domain movements in MiaA provoke the partial unfolding of the substrate tRNA anticodon loop. In addition, we show how substrate tRNAs are recognized by MiaA through a combination of direct and indirect sequence readouts.


    Organizational Affiliation

    Department of Cell and Molecular Biology, Medical Nobel Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
tRNA delta(2)-isopentenylpyrophosphate transferase
A, B
316Escherichia coli K-12Mutation(s): 0 
Gene Names: b4171E. coliJW4129miaAtrpX
EC: 2.5.1.8 (PDB Primary Data), 2.5.1.75 (UniProt)
Find proteins for P16384 (Escherichia coli (strain K12))
Go to UniProtKB:  P16384
Protein Feature View
  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganism
tRNA(Phe)C74N/A

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Entity ID: 3
MoleculeChainsLengthOrganism
tRNA(Phe)D69N/A
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download CCD File 
B, C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.245 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 89.24α = 90
b = 91.26β = 90
c = 152.36γ = 90
Software Package:
Software NamePurpose
MxCuBEdata collection
PHASERphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-01-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2018-05-23
    Changes: Data collection