QTRT1 — Queuine tRNA-ribosyltransferase catalytic subunit 1
QTRT1 belongs to a gene co-expression module in 1 of 30 SCUBA cell types. Each module groups genes that rise and fall together in that cell type; the genes it shares a module with are its closest co-expression partners there.
QTRT1's module in each cell type
| Cell type | Module | Shares the module with | |
|---|---|---|---|
| Colonocytes | Mitochondrial Biogenesis Mitochondrial & OxPhos | BCAT2, BCS1L, CCND2, CEP70, CLUH, CRLS1, CRTAP, DNAJA3 +28 more | View in SCUBA |
About the gene
| Synonyms | TGT |
|---|---|
| Chromosome | 19: 10701430-10713437 |
| Predicted location | Intracellular |
| Essential gene | No |
| Protein class | Enzymes, Metabolic proteins, Predicted intracellular proteins |
| Molecular function | Glycosyltransferase, Transferase |
| Biological process | tRNA processing |
Function
Catalytic subunit of the queuine tRNA-ribosyltransferase (TGT) that catalyzes the base-exchange of a guanine (G) residue with queuine (Q) at position 34 (anticodon wobble position) in tRNAs with GU(N) anticodons (tRNA-Asp, -Asn, -His and -Tyr), resulting in the hypermodified nucleoside queuosine (7-(((4,5-cis-dihydroxy-2- cyclopenten-1-yl)amino)methyl)-7-deazaguanosine). Catalysis occurs through a double-displacement mechanism. The nucleophile active site attacks the C1' of nucleotide 34 to detach the guanine base from the RNA, forming a covalent enzyme-RNA intermediate. The proton acceptor active site deprotonates the incoming queuine, allowing a nucleophilic attack on the C1' of the ribose to form the product (By similarity). Modification of cytoplasmic tRNAs with queuosine controls the elongation speed of cognate codons, thereby ensuring the correct folding of nascent proteins to maintain proteome integrity.
Human Protein Atlas · Open Targets · UniProt
Gene annotation from the Human Protein Atlas and UniProt; see sources & licences.