Target intelligence / Profile preview

Glutamyl-tRNA(Gln) amidotransferase subunit C, mitochondrial (GATC)

Target
GATC
Molecular classification
Enzyme, Mitochondrial enzyme complex subunit
01

Overview

Glutamyl-tRNA(Gln) amidotransferase subunit C, mitochondrial (GATC) is a mitochondrial protein that forms part of the heterotrimeric GatCAB complex, which is essential for mitochondrial protein synthesis. This enzyme catalyzes the transamidation of misacylated Glu-tRNA(Gln) to correctly charged Gln-tRNA(Gln), compensating for the absence of a dedicated mitochondrial glutaminyl-tRNA synthetase. This pathway is crucial for the fidelity of protein translation in mitochondria. Pathogenic variants in GATC impair mitochondrial translation and lead to severe diseases such as combined oxidative phosphorylation deficiency and metabolic cardiomyopathy. GATC mutation or dysfunction can result in tissue-specific defects, particularly affecting tissues with high metabolic demand (notably heart and muscle), and can be lethal in humans and model organisms.

Other names
15E1.2COXPD42Glu-AdT subunit CFLJ37000Protein 15E1.2glutamyl-tRNA(Gln) amidotransferase subunit C, mitochondrialglu-AdT subunit Cglutamyl-tRNA(Gln) amidotransferase, subunit C homologGATC
02

Biological functions

Mitochondrial translationAminoacyl-tRNA biosynthesis via transamidationAccurate charging of glutamyl-tRNA(Gln)
03

Disease associations

Mitochondrial diseaseCombined oxidative phosphorylation deficiencyMetabolic cardiomyopathy
04

Safety considerations

Not classically targeted by therapeutics; loss-of-function or pathogenic variants cause severe mitochondrial dysfunction, defective translation, and often fatal metabolic disorders
05

Biomarkers

Deficiency in GATC or GatCAB complex for diagnosis of combined oxidative phosphorylation deficiency 42 or related mitochondrial translation defects

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