| IED ID | IndEnz0002019382 |
| Enzyme Type ID | protease019382 |
| Protein Name |
Venom prothrombin activator trocarin-D vPA EC 3.4.21.6 Venom coagulation factor Xa-like protease Cleaved into: Trocarin-D light chain; Trocarin-D heavy chain |
| Gene Name | |
| Organism | Tropidechis carinatus (Australian rough-scaled snake) |
| Taxonomic Lineage | cellular organisms Eukaryota Opisthokonta Metazoa Eumetazoa Bilateria Deuterostomia Chordata Craniata Vertebrata Gnathostomata (jawed vertebrates) Teleostomi Euteleostomi Sarcopterygii Dipnotetrapodomorpha Tetrapoda Amniota Sauropsida Sauria (diapsids) Lepidosauria (lepidosaurs) Squamata (squamates) Bifurcata (split-tongued squamates) Unidentata Episquamata Toxicofera Serpentes (snakes) Colubroidea Elapidae Notechinae Tropidechis Tropidechis carinatus (Australian rough-scaled snake) |
| Enzyme Sequence | MAPQLLLCLILTFLWSLPEAESNVFLKSKVANRFLQRTKRSNSLFEEIRPGNIERECIEEKCSKEEAREVFEDNEKTETFWNVYVDGDQCSSNPCHYRGTCKDGIGSYTCTCLPNYEGKNCEKVLYQSCRVDNGNCWHFCKRVQSETQCSCAESYRLGVDGHSCVAEGDFSCGRNIKARNKREASLPDFVQSQKATLLKKSDNPSPDIRIVNGMDCKLGECPWQAVLINEKGEVFCGGTILSPIHVLTAAHCINQTKSVSVIVGEIDISRKETRRLLSVDKIYVHTKFVPPNYYYVHQNFDRVAYDYDIAIIRMKTPIQFSENVVPACLPTADFANEVLMKQDSGIVSGFGRIQFKQPTSNTLKVITVPYVDRHTCMLSSDFRITQNMFCAGYDTLPQDACQGDSGGPHITAYRDTHFITGIISWGEGCARKGKYGVYTKVSKFIPWIKKIMSLK |
| Enzyme Length | 455 |
| Uniprot Accession Number | P81428 |
| Absorption | |
| Active Site | ACT_SITE 251; /note=Charge relay system; /evidence=ECO:0000250; ACT_SITE 308; /note=Charge relay system; /evidence=ECO:0000250; ACT_SITE 405; /note=Charge relay system; /evidence=ECO:0000250 |
| Activity Regulation | ACTIVITY REGULATION: Activated by calcium and phospholipids. |
| Binding Site | |
| Calcium Binding | |
| catalytic Activity | CATALYTIC ACTIVITY: Reaction=Selective cleavage of Arg-|-Thr and then Arg-|-Ile bonds in prothrombin to form thrombin.; EC=3.4.21.6; |
| DNA Binding | |
| EC Number | 3.4.21.6 |
| Enzyme Function | FUNCTION: Snake prothrombin activator that attacks the hemostatic system of prey. This protein is functionally similar to blood coagulation factor Xa. Induces cyanosis and death in mice at 1 mg/kg body weight during blood clotting. {ECO:0000269|PubMed:10397729}. |
| Temperature Dependency | |
| PH Dependency | |
| Pathway | |
| nucleotide Binding | |
| Features | Active site (3); Chain (2); Disulfide bond (12); Domain (4); Glycosylation (2); Modified residue (11); Propeptide (2); Sequence conflict (1); Signal peptide (1); Site (1) |
| Keywords | Blood coagulation cascade activating toxin;Calcium;Cleavage on pair of basic residues;Direct protein sequencing;Disulfide bond;EGF-like domain;Gamma-carboxyglutamic acid;Glycoprotein;Hemostasis impairing toxin;Hydrolase;Protease;Prothrombin activator;Repeat;Secreted;Serine protease;Sialic acid;Signal;Toxin |
| Interact With | |
| Induction | |
| Subcellular Location | SUBCELLULAR LOCATION: Secreted {ECO:0000269|PubMed:10397729, ECO:0000269|PubMed:12871464}. |
| Modified Residue | MOD_RES 46; /note="4-carboxyglutamate"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729"; MOD_RES 47; /note="4-carboxyglutamate"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729"; MOD_RES 54; /note="4-carboxyglutamate"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729"; MOD_RES 56; /note="4-carboxyglutamate"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729"; MOD_RES 59; /note="4-carboxyglutamate"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729"; MOD_RES 60; /note="4-carboxyglutamate"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729"; MOD_RES 65; /note="4-carboxyglutamate"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729"; MOD_RES 66; /note="4-carboxyglutamate"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729"; MOD_RES 69; /note="4-carboxyglutamate"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729"; MOD_RES 72; /note="4-carboxyglutamate"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729"; MOD_RES 75; /note="4-carboxyglutamate"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729" |
| Post Translational Modification | PTM: Gamma-carboxyglutamate residues are formed by vitamin K dependent carboxylation. These residues are essential for the binding of calcium. {ECO:0000255|PROSITE-ProRule:PRU00463, ECO:0000269|PubMed:10397729}.; PTM: The O-linked saccharides at Ser-92 are a mixture of Xyl-Glc, and Glc along with smaller amounts of Xyl-GlcNAc, GlcNAc, Gal, GalNAc, Xyl-Gal, and Xyl-GalNAc, suggesting that the glycosyl transferases responsible for this modification are non-specific. The N-linked carbohydrate at Asn-254 (Asn-45 of the heavy chain) is a sialylated and diantennary oligosaccharide. {ECO:0000269|PubMed:10397729, ECO:0000269|PubMed:12871464}. |
| Signal Peptide | SIGNAL 1..20; /evidence=ECO:0000255 |
| Structure 3D | |
| Cross Reference PDB | - |
| Mapped Pubmed ID | - |
| Motif | |
| Gene Encoded By | |
| Mass | 51,407 |
| Kinetics | |
| Metal Binding | |
| Rhea ID | |
| Cross Reference Brenda | 3.4.21.6; |