Molecular Playground/ Copper-Zinc Superoxide Dismutase
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| + | '''Proposed Article Title: Molecular Playground/Copper-Zinc Superoxide Dismutase''' | ||
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| + | Banner: Cu/ Zn Superoxide Dismutase keeps you young | ||
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| + | The important function of Cu/ Zn [[Superoxide Dismutase|superoxide dismutase]] (SOD) is to detoxify damaging forms of oxygen. It catalyzes the dismutation of superoxide (O<sub>2</sub><sup>-</sup>) anion into molecular oxygen (O<sub>2</sub>) and hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>)<ref>[http://en.wikipedia.org/wiki/Superoxide_dismutase Superoxide dismutase in Wikipedia]</ref>. Mutations or disruptions in the protein can exacerbate a number of diseases, such as amyotrophic lateral sclerosis ([[Superoxide Dismutase|ALS]]) and diabetes<ref name="Culotta">PMID: 16828895</ref>. One of the reported mutations involves the reduction of the disulfide bond, leading to a destabilized protein structure <ref name="Culotta" />. This mutation is featured in the fatal ALS disease. The motor neurons of individuals are affected, and voluntary muscle control is lost. | ||
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| - | + | <Structure load='1cbj' size='400' frame='true' align='right' caption='Bovine superoxide dismutase with 1 Cu+2 (gold) and 1 Zn+2 (grey) in the active site [[1cbj]]' scene='Insert optional scene name here' /> | |
| + | Human Cu/ Zn superoxide dismutases (SOD) are homodimer proteins, consisting of two identical monomers, found in the cytoplasm of cells. Each monomer contains <scene name='User:Shaynah_Browne/Sandbox_1/Transparent_surface/4'>one atom of Copper (Cu), and one atom of Zinc (Zn)</scene>. Each Cu is bound to <scene name='User:Shaynah_Browne/Sandbox_1/Cu_cage/3'>four nitrogen atoms in histidines </scene>and each Zn is bound to four atoms as well. A <scene name='User:Shaynah_Browne/Sandbox_1/Disulfide_bond/2'>disulfide bond </scene>is also located in each monomer. Another interesting feature that contributes to the stability of the protein is the tight <scene name='User:Shaynah_Browne/Sandbox_1/Hydrophobic_surface/2'>hydrophobic surface</scene> between the monomers and “the two halves of the βeta (β)- barrel core” <ref name="Battistoni">PMID: 9488695</ref>. | ||
| + | {{Template:ColorKey_Hydrophobic}}, {{Template:ColorKey_Polar}} | ||
| + | ==3D structures of superoxide dismutase== | ||
| + | [[Superoxide Dismutase]] | ||
| - | + | ==References== | |
| - | < | + | <references /> |
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| Molecular Playground at the University of Massachusetts. MOVIE. |
Proposed Article Title: Molecular Playground/Copper-Zinc Superoxide Dismutase
Banner: Cu/ Zn Superoxide Dismutase keeps you young
The important function of Cu/ Zn superoxide dismutase (SOD) is to detoxify damaging forms of oxygen. It catalyzes the dismutation of superoxide (O2-) anion into molecular oxygen (O2) and hydrogen peroxide (H2O2)[1]. Mutations or disruptions in the protein can exacerbate a number of diseases, such as amyotrophic lateral sclerosis (ALS) and diabetes[2]. One of the reported mutations involves the reduction of the disulfide bond, leading to a destabilized protein structure [2]. This mutation is featured in the fatal ALS disease. The motor neurons of individuals are affected, and voluntary muscle control is lost.
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Human Cu/ Zn superoxide dismutases (SOD) are homodimer proteins, consisting of two identical monomers, found in the cytoplasm of cells. Each monomer contains . Each Cu is bound to and each Zn is bound to four atoms as well. A is also located in each monomer. Another interesting feature that contributes to the stability of the protein is the tight between the monomers and “the two halves of the βeta (β)- barrel core” [3]. Hydrophobic, Polar
3D structures of superoxide dismutase
References
- ↑ Superoxide dismutase in Wikipedia
- ↑ 2.0 2.1 Culotta VC, Yang M, O'Halloran TV. Activation of superoxide dismutases: putting the metal to the pedal. Biochim Biophys Acta. 2006 Jul;1763(7):747-58. Epub 2006 May 17. PMID:16828895 doi:10.1016/j.bbamcr.2006.05.003
- ↑ Battistoni A, Folcarelli S, Cervoni L, Polizio F, Desideri A, Giartosio A, Rotilio G. Role of the dimeric structure in Cu,Zn superoxide dismutase. pH-dependent, reversible denaturation of the monomeric enzyme from Escherichia coli. J Biol Chem. 1998 Mar 6;273(10):5655-61. PMID:9488695
