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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P00441: Variant p.Ile113Met

Superoxide dismutase [Cu-Zn]
Gene: SOD1
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Variant information Variant position: help 113 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance

Residue change: help From Isoleucine (I) to Methionine (M) at position 113 (I113M, p.Ile113Met). Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.
Physico-chemical properties: help Similar physico-chemical property. Both residues are medium size and hydrophobic. The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 1 The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Variant description: help In ALS1. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 113 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 154 The length of the canonical sequence.
Location on the sequence: help DGVADVSIEDSVISLSGDHC I IGRTLVVHEKADDLGKGGNE The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.
Sequence annotation in neighborhood: help The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.
TypePositionsDescription
Chain 2 – 154 Superoxide dismutase [Cu-Zn]
Binding site 121 – 121
Modified residue 99 – 99 Phosphoserine
Modified residue 103 – 103 Phosphoserine
Modified residue 106 – 106 Phosphoserine
Modified residue 108 – 108 Phosphoserine
Modified residue 123 – 123 N6-acetyllysine; alternate
Modified residue 123 – 123 N6-succinyllysine; alternate
Disulfide bond 58 – 147
Mutagenesis 112 – 112 C -> S. Enhances formation of fibrillar aggregates in the absence of bound zinc; when associated with S-7; S-58 and S-147.
Mutagenesis 123 – 123 K -> A. Decreased succinylation.
Mutagenesis 123 – 123 K -> E. Mimicks constitutive succinylation state; decreased activity.
Beta strand 113 – 115



Literature citations
Molecular analysis of the superoxide dismutase 1 gene in Spanish patients with sporadic or familial amyotrophic lateral sclerosis.
Garcia-Redondo A.; Bustos F.; Juan Y Seva B.; Del Hoyo P.; Jimenez S.; Campos Y.; Martin M.A.; Rubio J.C.; Canadillas F.; Arenas J.; Esteban J.;
Muscle Nerve 26:274-278(2002)
Cited for: VARIANTS ALS1 ARG-38; SER-66 AND MET-113;
Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.