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UniProtKB/Swiss-Prot P43003: Variant p.Pro290Arg

Excitatory amino acid transporter 1
Gene: SLC1A3
Variant information

Variant position:  290
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Proline (P) to Arginine (R) at position 290 (P290R, p.Pro290Arg).
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:  Change from medium size and hydrophobic (P) to large size and basic (R)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -2
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

Involvement in disease:  Episodic ataxia 6 (EA6) [MIM:612656]: A disorder characterized by episodic ataxia, seizures, migraine and alternating hemiplegia. {ECO:0000269|PubMed:16116111}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In EA6.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  290
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  542
The length of the canonical sequence.

Location on the sequence:   FFDSLNEAIMRLVAVIMWYA  P VGILFLIAGKIVEMEDMGVI
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.

Residue conservation: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         FFDSLNEAIMRLVAVIMWYAPVGILFLIAGKIVEMEDMGVI

Mouse                         FFDSLNEAIMRLVAVIMWYAPLGILFLIAGKIVEMEDMGVI

Rat                           FFDSLNEAIMRLVAVIMWYAPLGILFLIAGKILEMEDMGVI

Bovine                        FFDSLNEAIMRLVAVIMWYAPLGILFLIAGKIVEMEDMGVI

Caenorhabditis elegans        FFVIMDKVIMKLVMTVMWYSPFGIFCLIMGKILEIHDLADT

Sequence annotation in neighborhood:  
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 – 542 Excitatory amino acid transporter 1
Transmembrane 270 – 297 Helical; Name=5
Helix 283 – 300


Literature citations

Mutation in the glutamate transporter EAAT1 causes episodic ataxia, hemiplegia, and seizures.
Jen J.C.; Wan J.; Palos T.P.; Howard B.D.; Baloh R.W.;
Neurology 65:529-534(2005)
Cited for: VARIANT EA6 ARG-290;

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.