2.0 2012-10-10 12:11:49 -0600 2015-08-05 16:22:03 -0600 ECMDB23001 M2MDB003391 superoxide Highly reactive compounds produced when oxygen is reduced by a single electron. In biological systems, they may be generated during the normal catalytic function of a number of enzymes and during the oxidation of hemoglobin to METHEMOGLOBIN. In living organisms, SUPEROXIDE DISMUTASE protects the cell from the deleterious effects of superoxides. (HO2)(.) Dioxidanyl HO2(.) Hydrogen dioxide Hydroperoxo Hydroperoxy radical Perhydroxyl radical Peroxyl radical HO2 33.0067 32.997654276 dioxidanyl peroxyl radical 11062-77-4 [O]O InChI=1S/HO2/c1-2/h1H OUUQCZGPVNCOIJ-UHFFFAOYSA-N Solid Cytoplasm Extracellular mitochondria nucleus peroxisome logp -0.36 ChemAxon pka_strongest_acidic 5.8 ChemAxon pka_strongest_basic -6.8 ChemAxon iupac dioxidanyl ChemAxon average_mass 33.0067 ChemAxon mono_mass 32.997654276 ChemAxon smiles [O]O ChemAxon formula HO2 ChemAxon inchi InChI=1S/HO2/c1-2/h1H ChemAxon inchikey OUUQCZGPVNCOIJ-UHFFFAOYSA-N ChemAxon polar_surface_area 20.23 ChemAxon refractivity 4.01 ChemAxon polarizability 1.99 ChemAxon rotatable_bond_count 0 ChemAxon acceptor_count 2 ChemAxon donor_count 1 ChemAxon physiological_charge -1 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 23153 Specdb::MsMs 23154 Specdb::MsMs 23155 Specdb::MsMs 29951 Specdb::MsMs 29952 Specdb::MsMs 29953 HMDB02168 5359597 C00704 18421 Superoxide FDB022880 Superoxide dismutase [Mn] P00448 SODM_ECOLI sodA http://ecmdb.ca/proteins/P00448.xml Superoxide dismutase [Cu-Zn] P0AGD1 SODC_ECOLI sodC http://ecmdb.ca/proteins/P0AGD1.xml Superoxide dismutase [Fe] P0AGD3 SODF_ECOLI sodB http://ecmdb.ca/proteins/P0AGD3.xml 2 superoxide + 2 Hydrogen ion > Oxygen + Hydrogen peroxide 2 Hydrogen ion + 2 superoxide <> Oxygen + Hydrogen peroxide R00275 2 Hydrogen ion + 2 superoxide <> Oxygen + Hydrogen peroxide 2 Hydrogen ion + 2 superoxide <> Oxygen + Hydrogen peroxide