CATH Classification
| Level | CATH Code | Description |
|---|---|---|
|
3 | Alpha Beta |
|
3.30 | 2-Layer Sandwich |
|
3.30.460 | Beta Polymerase; domain 2 |
|
3.30.460.10 | Beta Polymerase, domain 2 |
Domain Context
CATH Clusters
| Superfamily | Beta Polymerase, domain 2 |
| Functional Family | CCA tRNA nucleotidyltransferase 1, mitochondrial |
Enzyme Information
| 2.7.7.72 |
CCA tRNA nucleotidyltransferase.
based on mapping to UniProt Q96Q11
A tRNA precursor + 2 CTP + ATP = a tRNA with a 3' CCA end + 3 diphosphate.
-!- The acylation of all tRNAs with an amino acid occurs at the terminal ribose of a 3' CCA sequence. -!- The CCA sequence is added to the tRNA precursor by stepwise nucleotide addition performed by a single enzyme that is ubiquitous in all living organisms. -!- Although the enzyme has the option of releasing the product after each addition, it prefers to stay bound to the product and proceed with the next addition. -!- Formerly EC 2.7.7.21 and EC 2.7.7.25.
|
UniProtKB Entries (1)
| Q96Q11 |
TRNT1_HUMAN
Homo sapiens
CCA tRNA nucleotidyltransferase 1, mitochondrial
|
PDB Structure
| PDB | 1OU5 |
| External Links | |
| Method | X-RAY DIFFRACTION |
| Organism | Escherichia |
| Primary Citation |
Crystal Structure of the Human CCA-adding Enzyme: Insights into Template-independent Polymerization
J.Mol.Biol.
|
