1I6L

1.7 HIGH RESOLUTION EXPERIMENTAL PHASES FOR TRYPTOPHANYL-TRNA SYNTHETASE COMPLEXED WITH TRYPTOPHANYL-5'AMP

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.72 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

High-resolution experimental phases for tryptophanyl-tRNA synthetase (TrpRS) complexed with tryptophanyl-5'AMP.

Retailleau, P., Yin, Y., Hu, M., Roach, J., Bricogne, G., Vonrhein, C., Roversi, P., Blanc, E., Sweet, R.M., Carter, C.W.

(2001) Acta Crystallogr.,Sect.D 57: 1595-1608

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Native data, anomalous data at three wavelengths and an independent peak-wavelength data set for SeMet-substituted protein have been collected from cryoprotected crystals of the TrpRS-adenylate product (TAM) complex to a resolution limit of 1.7 A. In ...

    Native data, anomalous data at three wavelengths and an independent peak-wavelength data set for SeMet-substituted protein have been collected from cryoprotected crystals of the TrpRS-adenylate product (TAM) complex to a resolution limit of 1.7 A. Independent phase sets were developed using SHARP and improved by solvent flipping with SOLOMON using molecular envelopes derived from experimental densities for, respectively, peak-wavelength SAD data from four different crystals, MAD data and their M(S)IRAS combinations with native data. Hendrickson-Lattman phase-probability coefficients from each phase set were used in BUSTER to drive maximum-likelihood refinements of well defined parts of the previously refined room-temperature 2.9 A structure. Maximum-entropy completion followed by manual rebuilding was then used to generate a model for the missing segments, bound ligand and solvent molecules. Surprisingly, peak-wavelength SAD experiments produced the smallest phase errors relative to the refined structures. Selenomethionylated models deviate from one another by 0.25 A and from the native model by 0.38 A, but all have r.m.s. deviations of approximately 1.0 A from the 2.9 A model. Difference Fourier calculations between amplitudes from the 300 K experiment and the new amplitudes at 100 K using 1.7 A model phases show no significant structural changes arising from temperature variation or addition of cryoprotectant. The main differences between low- and high-resolution structures arise from correcting side-chain rotamers in the core of the protein as well as on the surface. These changes improve various structure-validation criteria.

    Organizational Affiliation: 

    Department of Biochemistry and Biophysics, CB# 7260, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRYPTOPHANYL-TRNA SYNTHETASE
A
328Geobacillus stearothermophilusMutation(s): 0 
Gene Names: trpS
EC: 6.1.1.2
Find proteins for P00953 (Geobacillus stearothermophilus)
Go to UniProtKB:  P00953
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4
Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL
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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
NH4
Query on NH4
Download SDF File 
Download CCD File 
A
AMMONIUM ION
H4 N
QGZKDVFQNNGYKY-UHFFFAOYSA-O
 Ligand Interaction
TYM
Query on TYM
Download SDF File 
Download CCD File 
A
TRYPTOPHANYL-5'AMP
C21 H24 N7 O8 P
IFQVDHDRFCKAAW-SQIXAUHQSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.72 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.209 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 59.770α = 90.00
b = 59.770β = 90.00
c = 232.650γ = 90.00
Software Package:
Software NamePurpose
BUSTER-TNTrefinement
DENZOdata reduction
SHARPphasing
SCALEPACKdata scaling
BUSTERrefinement
BUSTERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-11-07
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance