| Structural highlights
Disease
[SODC_HUMAN] Defects in SOD1 are the cause of amyotrophic lateral sclerosis type 1 (ALS1) [MIM:105400]. ALS1 is a familial form of amyotrophic lateral sclerosis, a neurodegenerative disorder affecting upper and lower motor neurons and resulting in fatal paralysis. Sensory abnormalities are absent. Death usually occurs within 2 to 5 years. The etiology of amyotrophic lateral sclerosis is likely to be multifactorial, involving both genetic and environmental factors. The disease is inherited in 5-10% of cases leading to familial forms.[1] [2] [3] [4] [5] [6] [7] [8] [:][9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] [45]
Function
[SODC_HUMAN] Destroys radicals which are normally produced within the cells and which are toxic to biological systems.
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The solution structure of a mutated (Phe50Glu, Gly51Glu, Val148Lys, Ile151Lys), reduced, monomeric form of human copper,zinc superoxide dismutase (SOD; 153 amino acids) has been determined through 2237 meaningful nuclear Overhauser enhancements, out of 2492, and 43 dihedral angle constraints. A characteristic of this mutant is that of having the same overall charge as the dimeric protein, but an activity of only 20% with respect to wild-type SOD. This protein, at variance with a previously characterized monomeric form (Phe50Glu, Gly51Glu, Glu133Gln), does not contain mutations in the active site. Therefore, its characterization allows us to understand the structural changes independently induced by the monomerization and by the active site mutation. The family of 36 conformers, which have a target function with respect to the experimental constraints lower than 1.5 A2, has RMSD values with respect to the average structure of 0.94 +/- 0.14 A2 and 1.50 +/- 0.14 A2 for the backbone and the heavy atoms, respectively. The overall folding, which includes the classical eight-stranded Greek-key beta-barrel and a short alpha-helix, is very close to that of the previously characterized monomeric mutant E133QM2SOD and to that of wild-type SOD. The region involved in the subunit-subunit interactions in the dimeric protein is confirmed to be disordered in the monomeric species. It is also observed that a sizable rearrangement of the charged groups of the electrostatic loop and of Arg143 takes place in the monomeric species. The width of the active site channel, both at its entrance and at the bottleneck of the active site, is discussed in the light of the influence on the enzymatic activity and the latter with respect to the overall charge. It is also confirmed that the NH proton of His63 shields the Cu(I) from the bulk solvent, thus supporting the suggestion that superoxide may interact with the reduced metal ion in an outer-sphere fashion.
The solution structure of a monomeric, reduced form of human copper,zinc superoxide dismutase bearing the same charge as the native protein.,Banci L, Bertini I, Del Conte R, Fadin R, Mangani S, Viezzoli MS J Biol Inorg Chem. 1999 Dec;4(6):795-803. PMID:10631612[46]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
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- ↑ Yulug IG, Katsanis N, de Belleroche J, Collinge J, Fisher EM. An improved protocol for the analysis of SOD1 gene mutations, and a new mutation in exon 4. Hum Mol Genet. 1995 Jun;4(6):1101-4. PMID:7655468
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- ↑ Watanabe M, Aoki M, Abe K, Shoji M, Iizuka T, Ikeda Y, Hirai S, Kurokawa K, Kato T, Sasaki H, Itoyama Y. A novel missense point mutation (S134N) of the Cu/Zn superoxide dismutase gene in a patient with familial motor neuron disease. Hum Mutat. 1997;9(1):69-71. PMID:8990014 doi:<69::AID-HUMU14>3.0.CO;2-N 10.1002/(SICI)1098-1004(1997)9:1<69::AID-HUMU14>3.0.CO;2-N
- ↑ Kawamata J, Shimohama S, Takano S, Harada K, Ueda K, Kimura J. Novel G16S (GGC-AGC) mutation in the SOD-1 gene in a patient with apparently sporadic young-onset amyotrophic lateral sclerosis. Hum Mutat. 1997;9(4):356-8. PMID:9101297 doi:<356::AID-HUMU9>3.0.CO;2-3 10.1002/(SICI)1098-1004(1997)9:4<356::AID-HUMU9>3.0.CO;2-3
- ↑ Orrell RW, Marklund SL, deBelleroche JS. Familial ALS is associated with mutations in all exons of SOD1: a novel mutation in exon 3 (Gly72Ser). J Neurol Sci. 1997 Dec 9;153(1):46-9. PMID:9455977
- ↑ Kikugawa K, Nakano R, Inuzuka T, Kokubo Y, Narita Y, Kuzuhara S, Yoshida S, Tsuji S. A missense mutation in the SOD1 gene in patients with amyotrophic lateral sclerosis from the Kii Peninsula and its vicinity, Japan. Neurogenetics. 1997 Sep;1(2):113-5. PMID:10732812
- ↑ Bereznai B, Winkler A, Borasio GD, Gasser T. A novel SOD1 mutation in an Austrian family with amyotrophic lateral sclerosis. Neuromuscul Disord. 1997 Mar;7(2):113-6. PMID:9131652
- ↑ Ratovitski T, Corson LB, Strain J, Wong P, Cleveland DW, Culotta VC, Borchelt DR. Variation in the biochemical/biophysical properties of mutant superoxide dismutase 1 enzymes and the rate of disease progression in familial amyotrophic lateral sclerosis kindreds. Hum Mol Genet. 1999 Aug;8(8):1451-60. PMID:10400992
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- ↑ Murakami T, Warita H, Hayashi T, Sato K, Manabe Y, Mizuno S, Yamane K, Abe K. A novel SOD1 gene mutation in familial ALS with low penetrance in females. J Neurol Sci. 2001 Aug 15;189(1-2):45-7. PMID:11535232
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- ↑ Alexander MD, Traynor BJ, Miller N, Corr B, Frost E, McQuaid S, Brett FM, Green A, Hardiman O. "True" sporadic ALS associated with a novel SOD-1 mutation. Ann Neurol. 2002 Nov;52(5):680-3. PMID:12402272 doi:10.1002/ana.10369
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- ↑ Banci L, Bertini I, Boca M, Girotto S, Martinelli M, Valentine JS, Vieru M. SOD1 and amyotrophic lateral sclerosis: mutations and oligomerization. PLoS One. 2008 Feb 27;3(2):e1677. doi: 10.1371/journal.pone.0001677. PMID:18301754 doi:10.1371/journal.pone.0001677
- ↑ del Grande A, Luigetti M, Conte A, Mancuso I, Lattante S, Marangi G, Stipa G, Zollino M, Sabatelli M. A novel L67P SOD1 mutation in an Italian ALS patient. Amyotroph Lateral Scler. 2011 Mar;12(2):150-2. doi: 10.3109/17482968.2011.551939., Epub 2011 Jan 19. PMID:21247266 doi:10.3109/17482968.2011.551939
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- ↑ Banci L, Bertini I, Del Conte R, Fadin R, Mangani S, Viezzoli MS. The solution structure of a monomeric, reduced form of human copper,zinc superoxide dismutase bearing the same charge as the native protein. J Biol Inorg Chem. 1999 Dec;4(6):795-803. PMID:10631612
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