2CT8 image
Deposition Date 2005-05-23
Release Date 2005-09-20
Last Version Date 2024-03-13
Entry Detail
PDB ID:
2CT8
Keywords:
Ligase/RNA
Title:
Crystal structure of Aquifex aeolicus methionyl-tRNA synthetase complexed with tRNA(Met) and methionyl-adenylate anologue
Biological Source:
Source Organism:
Aquifex aeolicus (Taxon ID: 63363)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.70 Å
R-Value Free:
0.27
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 21 21 21
2CT8 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Methionyl-tRNA synthetase
Gene (Uniprot):metG
Chain IDs:C (auth: A), D (auth: B)
Chain Length:497
Number of Molecules:2
Biological Source:Aquifex aeolicus
UniProt ID:O67298 Pfam ID:PF09334, PF08264
Ligand Molecules
MSP
Primary Citation
Structural basis for anticodon recognition by methionyl-tRNA synthetase.
Nat.Struct.Mol.Biol. 12 931 932 (2005)
PMID: 16155581 DOI: 10.1038/nsmb988

Abstact

In the 2.7-A resolution crystal structure of methionyl-tRNA synthetase (MetRS) in complex with tRNA(Met) and a methionyl-adenylate analog, the tRNA anticodon loop is distorted to form a triple-base stack comprising C34, A35 and A38. A tryptophan residue stacks on C34 to extend the triple-base stack. In addition, C34 forms Watson-Crick-type hydrogen bonds with Arg357. This structure resolves the longstanding question of how MetRS specifically recognizes tRNA(Met).

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Chemical

Disease

Primary Citation of related structures
2CSX