CATH Classification
| Level | CATH Code | Description |
|---|---|---|
|
3 | Alpha Beta |
|
3.40 | 3-Layer(aba) Sandwich |
|
3.40.50 | Rossmann fold |
|
3.40.50.300 | P-loop containing nucleotide triphosphate hydrolases |
Domain Context
CATH Clusters
| Superfamily | P-loop containing nucleotide triphosphate hydrolases |
| Functional Family |
Enzyme Information
| 3.6.4.13 |
RNA helicase.
based on mapping to UniProt P27958
ATP + H(2)O = ADP + phosphate.
-!- RNA helicases utilize the energy from ATP hydrolysis to unwind RNA. -!- Some of them unwind RNA with a 3' to 5' polarity, other show 5' to 3' polarity. -!- Some helicases unwind DNA as well as RNA. -!- May be identical with EC 3.6.4.12 (DNA helicase).
|
| 3.4.21.98 |
Hepacivirin.
based on mapping to UniProt P27958
Hydrolysis of four peptide bonds in the viral precursor polyprotein, commonly with Asp or Glu in the P6 position, Cys or Thr in P1 and Ser or Ala in P1'.
-!- Encoded by the genome of the viruses of the hepatitis C group, and contributes to the maturation of the precursor polyproteins. -!- The enzyme is greatly activated by binding of the 54-residue NS4A 'cofactor' protein also derived from the viral polyprotein. -!- Belongs to peptidase family S29.
|
| 3.4.22.- |
Cysteine endopeptidases.
based on mapping to UniProt P27958
|
| 3.6.1.15 |
Nucleoside-triphosphate phosphatase.
based on mapping to UniProt P27958
NTP + H(2)O = NDP + phosphate.
-!- The enzyme is found in eukaryotes and thermophilic bacteria, but appears to be absent from mesophilic bacteria. -!- Also hydrolyzes nucleoside diphosphates, thiamine diphosphate and FAD. -!- The enzyme from the plant Pisum sativum (garden pea) is regulated by calmodulin.
|
| 2.7.7.48 |
RNA-directed RNA polymerase.
based on mapping to UniProt P27958
Nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1).
-!- Catalyzes RNA-template-directed extension of the 3'-end of an RNA strand by one nucleotide at a time. -!- Can initiate a chain de novo. -!- See also EC 2.7.7.6.
|
UniProtKB Entries (1)
| P27958 |
POLG_HCVH
Hepatitis C virus (isolate H)
Genome polyprotein
|
PDB Structure
| PDB | 1A1V |
| External Links | |
| Method | X-RAY DIFFRACTION |
| Organism | |
| Primary Citation |
Hepatitis C virus NS3 RNA helicase domain with a bound oligonucleotide: the crystal structure provides insights into the mode of unwinding.
Structure
|