| Structural highlights
6a9o is a 10 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Ligands: | , , , , |
| Gene: | SOD1 (HUMAN) |
| Activity: | Superoxide dismutase, with EC number 1.15.1.1 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
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.
Publication Abstract from PubMed
Formation of Cu, Zn superoxide dismutase 1 (SOD1) protein inclusions within motor neurons is one of the principal characteristics of SOD1-related amyotrophic lateral sclerosis (ALS). A hypothesis as to the nature of SOD1 aggregation implicates oxidative damage to a solvent-exposed tryptophan as causative. Here, we chart discovery of a phenanthridinone based compound (Lig9) from the NCI Diversity Set III by rational methods by in silico screening and crystallographic validation. The crystal structure of the complex with SOD1, refined to 2.5 A, revealed that Lig9 binds the SOD1 beta-barrel in the beta-strand 2 and 3 region which is known to scaffold SOD1 fibrillation. The phenanthridinone moiety makes a substantial pi - pi interaction with Trp32 of SOD1. The compound possesses a significant binding affinity for SOD1 and inhibits oxidation of Trp32; a critical residue for SOD1 aggregation. Thus, Lig9 is a good candidate from which to develop a new library of SOD1 aggregation inhibitors through protection of Trp32 oxidation.
Rational discovery of a SOD1 tryptophan oxidation inhibitor with therapeutic potential for amyotrophic lateral sclerosis.,Ramu M, Unni S, Wright GSA, M M Srinivas B, Padmanabhan B J Biomol Struct Dyn. 2018 Oct 4:1-33. doi: 10.1080/07391102.2018.1531787. PMID:30286701[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
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- ↑ 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
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- ↑ Ramu M, Unni S, Wright GSA, M M Srinivas B, Padmanabhan B. Rational discovery of a SOD1 tryptophan oxidation inhibitor with therapeutic potential for amyotrophic lateral sclerosis. J Biomol Struct Dyn. 2018 Oct 4:1-33. doi: 10.1080/07391102.2018.1531787. PMID:30286701 doi:http://dx.doi.org/10.1080/07391102.2018.1531787
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