CATH Classification
| Level | CATH Code | Description |
|---|---|---|
|
1 | Mainly Alpha |
|
1.20 | Up-down Bundle |
|
1.20.120 | Four Helix Bundle (Hemerythrin (Met), subunit A) |
|
1.20.120.890 | tRNA(Met) cytidine acetyltransferase, tail domain |
Domain Context
CATH Clusters
| Superfamily | tRNA(Met) cytidine acetyltransferase, tail domain |
| Functional Family | tRNA(Met) cytidine acetyltransferase TmcA |
Enzyme Information
| 2.3.1.193 |
tRNA(Met) cytidine acetyltransferase.
based on mapping to UniProt P76562
(Elongator tRNA(Met))-cytidine(34) + ATP + acetyl-CoA + H(2)O = (elongator tRNA(Met))-N(4)-acetylcytidine(34) + ADP + phosphate + CoA.
-!- The enzyme acetylates the wobble base C34 of the CAU anticodon of elongation-specific tRNA(Met). -!- Escherichia coli TmcA strictly discriminates elongator tRNA(Met) from tRNA(Ile), which is structurally similar and has the same anticodon loop, mainly by recognizing the C27-G43 pair in the anticodon stem. -!- The enzyme can use GTP in place of ATP for formation of N(4)- acetylcytidine.
|
UniProtKB Entries (1)
| P76562 |
TMCA_ECOLI
Escherichia coli K-12
TRNA(Met) cytidine acetyltransferase TmcA
|
PDB Structure
| PDB | 2ZPA |
| External Links | |
| Method | X-RAY DIFFRACTION |
| Organism | |
| Primary Citation |
RNA helicase module in an acetyltransferase that modifies a specific tRNA anticodon
Embo J.
|