1OBH

LEUCYL-TRNA SYNTHETASE FROM THERMUS THERMOPHILUS COMPLEXED WITH A PRE-TRANSFER EDITING SUBSTRATE ANALOGUE IN BOTH SYNTHETIC ACTIVE SITE AND EDITING SITE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural and Mechanistic Basis of Pre- and Posttransfer Editing by Leucyl-tRNA Synthetase

Lincecum, T.Tukalo, M.Yaremchuk, A.Mursinna, R.Williams, A.Sproat, B.Van Den Eynde, W.Link, A.Van Calenbergh, S.Grotli, M.Martinis, S.Cusack, S.

(2003) Mol.Cell 11: 951

  • Primary Citation of Related Structures:  1OBC

  • PubMed Abstract: 
  • The aminoacyl-tRNA synthetases link tRNAs with their cognate amino acid. In some cases, their fidelity relies on hydrolytic editing that destroys incorrectly activated amino acids or mischarged tRNAs. We present structures of leucyl-tRNA synthetase c ...

    The aminoacyl-tRNA synthetases link tRNAs with their cognate amino acid. In some cases, their fidelity relies on hydrolytic editing that destroys incorrectly activated amino acids or mischarged tRNAs. We present structures of leucyl-tRNA synthetase complexed with analogs of the distinct pre- and posttransfer editing substrates. The editing active site binds the two different substrates using a single amino acid discriminatory pocket while preserving the same mode of adenine recognition. This suggests a similar mechanism of hydrolysis for both editing substrates that depends on a key, completely conserved aspartic acid, which interacts with the alpha-amino group of the noncognate amino acid and positions both substrates for hydrolysis. Our results demonstrate the economy by which a single active site accommodates two distinct substrates in a proofreading process critical to the fidelity of protein synthesis.


    Related Citations: 
    • The 2A Structure of Leucyl-tRNA Synthetase and its Complex with a Leucyl-Adenylate Analogue
      Cusack, S.,Yaremchuk, A.,Tukalo, M.
      (2000) Embo J. 19: 2351
    • Crystallization and Preliminary Crystallographic Analysis of Thermus Thermophilus Leucyl-tRNA Synthetase and its Complexes with Leucine and a Non-Hydrolysable Leucyl-Adenylate Analogue
      Yaremchuk, A.,Cusack, S.,Gudzera, O.,Grotli, M.,Tukalo, M.
      (2000) Acta Crystallogr.,Sect.D 56: 667


    Organizational Affiliation

    Department of Biology and Biochemistry, University of Houston, Texas 77204, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LEUCYL-TRNA SYNTHETASE
A
878Thermus thermophilusGene Names: leuS
EC: 6.1.1.4
Find proteins for Q7SIE4 (Thermus thermophilus)
Go to UniProtKB:  Q7SIE4
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NVA
Query on NVA

Download SDF File 
Download CCD File 
A
NORVALINE
C5 H11 N O2
SNDPXSYFESPGGJ-BYPYZUCNSA-N
 Ligand Interaction
LMS
Query on LMS

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Download CCD File 
A
[(2R,3S,4R,5R)-5-(6-AMINO-9H-PURIN-9-YL)-3,4-DIHYDROXYTETRAHYDRO-2-FURANYL]METHYL SULFAMATE
C10 H14 N6 O6 S
GNZLUJQJDPRUTD-KQYNXXCUSA-N
 Ligand Interaction
SO4
Query on SO4

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Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
HG
Query on HG

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Download CCD File 
A
MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.213 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 103.515α = 90.00
b = 152.884β = 90.00
c = 172.605γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
MOLREPphasing
CNSrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-05-09
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance