| IED ID | IndEnz0018000463 |
| Enzyme Type ID | peroxidase000463 |
| Protein Name |
Catalase-peroxidase CP EC 1.11.1.21 Hydroperoxidase I HPI Peroxidase/catalase |
| Gene Name | katG cpeA |
| Organism | Rhodobacter capsulatus (Rhodopseudomonas capsulata) |
| Taxonomic Lineage | cellular organisms Bacteria Proteobacteria Alphaproteobacteria Rhodobacterales Rhodobacteraceae Rhodobacter Rhodobacter capsulatus (Rhodopseudomonas capsulata) |
| Enzyme Sequence | MDGKDKATGKCPVMHGAMTAAGVSNTSWWPNALNLDILHQHDTKGNPLNGFDYRAAVKGLDVGLRADLHALMTDSQPWWPADWGHYGGLMIRMAWHAAGSYRAADGRGGGNTGKPARFAPLNSWPDNVSLDKARRLLWPIKKKYGNAVSWADLILFAGTVAYESMGLKTFGFGFGREDIWAPEKDVYWGAEKDWLAPSDGRYGDLAKPETMENPLAAVQMGLIYVNPEGVNGQPDPARTALHIRETFARMGMNDEETVALTAGGHTVGKAHGNGDAKALGPDPEAADVTVRALAGRTRIWAARRRRPSPRGSRAPGPRIRRAGTWAISRCSSGHDWELTKSPAGAWQWKPVTIAEEAKPLDATDLTTRHDPLMTDADMAMKVDPSTMRSVRSSWPIRPPSTTLSRAPGSSCCIATWGRRRATSAPMCPPRIWSAGPGAAGPTGWDVAKVKAQIAASGLSVADLVATAWDSARTFRQSDYRGGANGARIRLAPQKDWAGNEPERLAGACGARTDRGGAGASVADVIVLAGNLGVEQAAAGVSRWRCPSPPVAAMRAAMTDGPSLTCWSRCMTASATG |
| Enzyme Length | 576 |
| Uniprot Accession Number | P37743 |
| Absorption | |
| Active Site | ACT_SITE 96; /note="Proton acceptor"; /evidence="ECO:0000255|PROSITE-ProRule:PRU00297, ECO:0000255|PROSITE-ProRule:PRU10012" |
| Activity Regulation | |
| Binding Site | |
| Calcium Binding | |
| catalytic Activity | CATALYTIC ACTIVITY: Reaction=AH2 + H2O2 = A + 2 H2O; Xref=Rhea:RHEA:30275, ChEBI:CHEBI:13193, ChEBI:CHEBI:15377, ChEBI:CHEBI:16240, ChEBI:CHEBI:17499; EC=1.11.1.21; Evidence={ECO:0000255|PROSITE-ProRule:PRU00297}; CATALYTIC ACTIVITY: Reaction=2 H2O2 = 2 H2O + O2; Xref=Rhea:RHEA:20309, ChEBI:CHEBI:15377, ChEBI:CHEBI:15379, ChEBI:CHEBI:16240; EC=1.11.1.21; |
| DNA Binding | |
| EC Number | 1.11.1.21 |
| Enzyme Function | FUNCTION: Bifunctional enzyme with both catalase and broad-spectrum peroxidase activity. Displays also NADH oxidase, INH lyase and isonicotinoyl-NAD synthase activity. Important for stationary phase survival. {ECO:0000269|PubMed:1577703}. |
| Temperature Dependency | |
| PH Dependency | BIOPHYSICOCHEMICAL PROPERTIES: pH dependence: Optimum pH is 5.0 for the peroxidase reaction and 6-6.5 for the catalase reaction. {ECO:0000269|PubMed:18178143, ECO:0000269|PubMed:3571290}; |
| Pathway | |
| nucleotide Binding | |
| Features | Active site (1); Chain (1); Cross-link (2); Metal binding (1); Site (1) |
| Keywords | Direct protein sequencing;Heme;Hydrogen peroxide;Iron;Metal-binding;Oxidoreductase;Peroxidase |
| Interact With | |
| Induction | |
| Subcellular Location | |
| Modified Residue | |
| Post Translational Modification | PTM: Formation of the three residue Trp-Tyr-Met cross-link is important for the catalase, but not the peroxidase activity of the enzyme. {ECO:0000250}. |
| Signal Peptide | |
| Structure 3D | |
| Cross Reference PDB | - |
| Mapped Pubmed ID | - |
| Motif | |
| Gene Encoded By | |
| Mass | 61,517 |
| Kinetics | BIOPHYSICOCHEMICAL PROPERTIES: Kinetic parameters: KM=30 mM for H(2)O(2) for the catalase reaction (at pH 5.5-6.0) {ECO:0000269|PubMed:18178143, ECO:0000269|PubMed:3571290}; KM=3.7 mM for H(2)O(2) for the catalase reaction (at pH 7.0) {ECO:0000269|PubMed:18178143, ECO:0000269|PubMed:3571290}; KM=830 mM for H(2)O(2) for the peroxidase reaction {ECO:0000269|PubMed:18178143, ECO:0000269|PubMed:3571290}; KM=16 mM for ABTS for the peroxidase reaction {ECO:0000269|PubMed:18178143, ECO:0000269|PubMed:3571290}; Vmax=10510 umol/min/mg enzyme for H(2)O(2) for the catalase reaction (at pH 5.5-6.0) {ECO:0000269|PubMed:18178143, ECO:0000269|PubMed:3571290}; Vmax=5100 umol/min/mg enzyme for H(2)O(2) for the catalase reaction (at pH 7.0) {ECO:0000269|PubMed:18178143, ECO:0000269|PubMed:3571290}; Vmax=5.9 umol/min/mg enzyme for ABTS for the peroxidase reaction {ECO:0000269|PubMed:18178143, ECO:0000269|PubMed:3571290}; |
| Metal Binding | METAL 265; /note=Iron (heme b axial ligand); /evidence=ECO:0000255|PROSITE-ProRule:PRU00297 |
| Rhea ID | RHEA:30275; RHEA:20309 |
| Cross Reference Brenda |