Extracellular superoxide dismutase [Cu-Zn] (SOD3) (SOD3)

Extracellular superoxide dismutase [Cu-Zn] (SOD3) is a copper- and zinc-containing enzyme that serves as the primary antioxidant in the extracellular space [UniProt]. It is uniquely characterized by a C-terminal heparin-binding domain that allows it to anchor to the extracellular matrix and cell surfaces, particularly within the vascular wall [PubMed: 12697514]. The enzyme's main function is to catalyze the dismutation of superoxide anions into hydrogen peroxide and oxygen, thereby protecting cells from oxidative stress and preventing the sequestration of nitric oxide [UniProt, PubMed: 32164231]. In clinical contexts, SOD3 deficiency or dysfunction is linked to various pathologies, including hypertension, atherosclerosis, and chronic obstructive pulmonary disease (COPD) [PubMed: 32164231, PubMed: 25603308]. Therapeutic strategies involving SOD3 include the use of recombinant proteins, gene therapy, and small-molecule mimetics to restore the antioxidant balance in inflamed or damaged tissues [PubMed: 12697514, PubMed: 25603308]. Furthermore, SOD3 plays a complex role in oncology, where it can influence tumor growth and metastasis by modulating the redox state of the tumor microenvironment [PubMed: 32164231]. While promising, drug development faces challenges such as maintaining the enzyme's stability and ensuring precise localization to target tissues without disrupting essential redox signaling pathways [PubMed: 12697514, PubMed: 25603308].

Other names

Superoxide dismutase 3SOD3EC-SODExtracellular superoxide dismutase

Catalyzes the conversion of superoxide radicals into hydrogen peroxide and oxygen in the extracellular environment, reducing oxidative stress and preserving nitric oxide signaling [UniProt, PubMed: 32164231].