Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 62908.43 
• Atom Count: 4382 
• Residue Count: 551 
• Unique protein chains: 1

1QQT

METHIONYL-TRNA SYNTHETASE FROM ESCHERICHIA COLI

• DOI: 10.2210/pdb1QQT/pdb

• Classification: LIGASE
• Organism(s): Escherichia coli (strain K12)
• Expression System: Escherichia coli


• Deposited: 1999-06-08 Released: 2000-01-01 
• Deposition Author(s): Mechulam, Y., Schmitt, E., Maveyraud, L., Zelwer, C., Nureki, O., Yokoyama, S., Konno, M., Blanquet, S.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.03 Å
• R-Value Free: 0.214 
• R-Value Work: 0.170 

Literature

Crystal structure of Escherichia coli methionyl-tRNA synthetase highlights species-specific features.

Mechulam, Y., Schmitt, E., Maveyraud, L., Zelwer, C., Nureki, O., Yokoyama, S., Konno, M., Blanquet, S.

(1999) J.Mol.Biol. 294: 1287-1297

• PubMed: 10600385 
• DOI: 10.1006/jmbi.1999.3339


• PubMed Abstract: 
  

The 3D structure of monomeric C-truncated Escherichia coli methionyl-tRNA synthetase, a class 1 aminoacyl-tRNA synthetase, has been solved at 2.0 A resolution. Remarkably, the polypeptide connecting the two halves of the Rossmann fold exposes two identical knuckles related by a 2-fold axis but with zinc in the distal knuckle only. Examination of available MetRS orthologs reveals four classes according to the number and zinc content of the putative knuckles. Extreme cases are exemplified by the MetRS of eucaryotic or archaeal origin, where two knuckles and two metal ions are expected, and by the mitochondrial enzymes, which are predicted to have one knuckle without metal ion.

---

Organizational Affiliation: 

Laboratoire de Biochimie, Ecole Polytechnique, CNRS UMR 7654, Palaiseau Cedex, F-91128, France.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
METHIONYL-TRNA SYNTHETASE	A	551	Escherichia coli (strain K12)	Mutation(s): 0  Gene Names: metG EC: 6.1.1.10
Find proteins for P00959 (Escherichia coli (strain K12)) Go to UniProtKB:  P00959

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.03 Å
• R-Value Free: 0.214 
• R-Value Work: 0.170 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 78.150	α = 90.00
b = 46.300	β = 109.06
c = 87.700	γ = 90.00

Software Package:

Software Name	Purpose
ROTAVATA	data scaling
CCP4	data scaling
X-PLOR	model building
X-PLOR	phasing
X-PLOR	refinement
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-06-08 
• Released Date: 2000-01-01 
• Deposition Author(s): Mechulam, Y., Schmitt, E., Maveyraud, L., Zelwer, C., Nureki, O., Yokoyama, S., Konno, M., Blanquet, S.

Revision History 

• Version 1.0: 2000-01-01
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-10-04
  Type: Refinement description