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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P11166: Variant p.Arg126His

Solute carrier family 2, facilitated glucose transporter member 1
Gene: SLC2A1
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Variant information Variant position: help 126 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 Arginine (R) to Histidine (H) at position 126 (R126H, p.Arg126His). 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 Change from large size and basic (R) to medium size and polar (H) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 0 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 GLUT1DS1; significantly decreases the transport of 3-O-methyl-D-glucose and dehydroascorbic acid; 57% of wild-type glucose uptake activity. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 126 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 492 The length of the canonical sequence.
Location on the sequence: help SAVLMGFSKLGKSFEMLILG R FIIGVYCGLTTGFVPMYVGE 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 1 – 492 Solute carrier family 2, facilitated glucose transporter member 1
Transmembrane 121 – 144 Helical; Name=4
Binding site 137 – 137
Helix 119 – 147



Literature citations
Autosomal dominant Glut-1 deficiency syndrome and familial epilepsy.
Brockmann K.; Wang D.; Korenke C.G.; von Moers A.; Ho Y.-Y.; Pascual J.M.; Kuang K.; Yang H.; Ma L.; Kranz-Eble P.; Fischbarg J.; Hanefeld F.; De Vivo D.C.;
Ann. Neurol. 50:476-485(2001)
Cited for: VARIANT GLUT1DS1 HIS-126; Imaging the metabolic footprint of Glut1 deficiency on the brain.
Pascual J.M.; van Heertum R.L.; Wang D.; Engelstad K.; De Vivo D.C.;
Ann. Neurol. 52:458-464(2002)
Cited for: VARIANTS GLUT1DS1 CYS-126; HIS-126; LYS-146; CYS-153 AND TRP-333; Glut-1 deficiency syndrome: clinical, genetic, and therapeutic aspects.
Wang D.; Pascual J.M.; Yang H.; Engelstad K.; Jhung S.; Sun R.P.; De Vivo D.C.;
Ann. Neurol. 57:111-118(2005)
Cited for: VARIANTS GLUT1DS1 SER-34; HIS-126; SER-130; CYS-153; LEU-169 DEL; MET-295 AND TRP-333; CHARACTERIZATION OF VARIANTS GLUT1 DEFICIENCY SER-34; HIS-126; SER-130; CYS-153; LEU-169 DEL; MET-295 AND TRP-333; Absence epilepsies with widely variable onset are a key feature of familial GLUT1 deficiency.
Mullen S.A.; Suls A.; De Jonghe P.; Berkovic S.F.; Scheffer I.E.;
Neurology 75:432-440(2010)
Cited for: VARIANTS GLUT1DS2 ILE-95; PRO-223; SER-314 AND LEU-324; VARIANTS GLUT1DS1 ASP-91 AND HIS-126;
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.