7WRU image
Entry Detail
PDB ID:
7WRU
Keywords:
TRANSLATION
Title:
Crystal structure of the apo chicken glutamyl-tRNA synthetase 1 (EARS1)
Biological Source:
Source Organism:
Gallus gallus
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2022-01-27
Release Date:
2022-11-23
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.50 Å
R-Value Free:
0.27
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 1 21 1
7WRU validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Glutamyl-tRNA synthetase
Chain IDs:A
Chain Length:531
Number of Molecules:1
Biological Source:Gallus gallus
UniProt ID:A0A3Q2TSP8 Pfam ID:PF00749, PF03950, PF20974
Ligand Molecules
HG
Primary Citation
Regulation of BRCA1 stability through the tandem UBX domains of isoleucyl-tRNA synthetase 1.
Nat Commun 13 6732 6732 (2022)
PMID: 36347866 DOI: 10.1038/s41467-022-34612-y

Abstact

Aminoacyl-tRNA synthetases (ARSs) have evolved to acquire various additional domains. These domains allow ARSs to communicate with other cellular proteins in order to promote non-translational functions. Vertebrate cytoplasmic isoleucyl-tRNA synthetases (IARS1s) have an uncharacterized unique domain, UNE-I. Here, we present the crystal structure of the chicken IARS1 UNE-I complexed with glutamyl-tRNA synthetase 1 (EARS1). UNE-I consists of tandem ubiquitin regulatory X (UBX) domains that interact with a distinct hairpin loop on EARS1 and protect its neighboring proteins in the multi-synthetase complex from degradation. Phosphomimetic mutation of the two serine residues in the hairpin loop releases IARS1 from the complex. IARS1 interacts with BRCA1 in the nucleus, regulates its stability by inhibiting ubiquitylation via the UBX domains, and controls DNA repair function.

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Primary Citation of related structures
7WRU