Superoxide Dismutase - Types - Human

Human

Three forms of superoxide dismutase are present in humans, in all other mammals, and most chordates. SOD1 is located in the cytoplasm, SOD2 in the mitochondria, and SOD3 is extracellular. The first is a dimer (consists of two units), whereas the others are tetramers (four subunits). SOD1 and SOD3 contain copper and zinc, whereas SOD2, the mitochondrial enzyme, has manganese in its reactive centre. The genes are located on chromosomes 21, 6, and 4, respectively (21q22.1, 6q25.3 and 4p15.3-p15.1).

SOD1, soluble
Crystallographic structure of the human SOD1 enzyme (rainbow colored N-terminus = blue, C-terminus = red) complexed with copper (blue-green sphere) and zinc (grey spheres).
Identifiers
Symbol SOD1
Alt. symbols ALS, ALS1
Entrez 6647
HUGO 11179
OMIM 147450
RefSeq NM_000454
UniProt P00441
Other data
EC number 1.15.1.1
Locus Chr. 21 q22.1
SOD2, mitochondrial
Structure of the active site of human superoxide dismutase 2.
Identifiers
Symbol SOD2
Alt. symbols Mn-SOD; IPO-B; MVCD6
Entrez 6648
HUGO 11180
OMIM 147460
RefSeq NM_000636
UniProt P04179
Other data
EC number 1.15.1.1
Locus Chr. 6 q25
SOD3, extracellular
Crystallographic structure of the tetrameric human SOD3 enzyme (cartoon diagram) complexed with copper and zinc cations (orange and grey spheres respectively).
Identifiers
Symbol SOD3
Alt. symbols EC-SOD; MGC20077
Entrez 6649
HUGO 11181
OMIM 185490
RefSeq NM_003102
UniProt P08294
Other data
EC number 1.15.1.1
Locus Chr. 4 pter-q21

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