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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O43424: Variant p.Ala654Thr

Glutamate receptor ionotropic, delta-2
Gene: GRID2
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Variant information Variant position: help 654 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 Alanine (A) to Threonine (T) at position 654 (A654T, p.Ala654Thr). 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 small size and hydrophobic (A) to medium size and polar (T) 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 SCAR18; constitutively open the extracellular-glutamate-gated ion channel. Any additional useful information about the variant.


Sequence information Variant position: help 654 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1007 The length of the canonical sequence.
Location on the sequence: help MGAWWLFALIVISSYTANLA A FLTITRIESSIQSLQDLSKQ 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences. 
Human                         MGAWWLFALIVISSYTANLAAFLTITRIESSIQSLQDLSKQ

Mouse                         MGAWWLFALIVISSYTANLAAFLTITRIESSIQSLQDLSKQ

Rat                           MGAWWLFALIVISSYTANLAAFLTITRIESSIQSLQDLSKQ

Zebrafish                     MGVWWLFALIVISSYTANLAAFLTISRIENSIQSLQDLAKQ
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 24 – 1007 Glutamate receptor ionotropic, delta-2
Transmembrane 636 – 656 Helical



Literature citations
Structural basis for integration of GluD receptors within synaptic organizer complexes.
Elegheert J.; Kakegawa W.; Clay J.E.; Shanks N.F.; Behiels E.; Matsuda K.; Kohda K.; Miura E.; Rossmann M.; Mitakidis N.; Motohashi J.; Chang V.T.; Siebold C.; Greger I.H.; Nakagawa T.; Yuzaki M.; Aricescu A.R.;
Science 353:295-299(2016)
Cited for: X-RAY CRYSTALLOGRAPHY (1.75 ANGSTROMS) OF 24-440; DISULFIDE BONDS; INTERACTION WITH CBLN1; MUTAGENESIS OF ASP-24; SER-25; ILE-26; THR-60; GLU-61; PHE-76; LEU-342; GLU-343; ASP-344; ARG-345; LYS-346; HIS-348; SER-349; MET-350; SER-352; GLN-364 AND LEU-434; SUBUNIT; FUNCTION; REGION; SITE; CHARACTERIZATION OF VARIANT SCAR18 THR-654; GRID2 mutations span from congenital to mild adult-onset cerebellar ataxia.
Coutelier M.; Burglen L.; Mundwiller E.; Abada-Bendib M.; Rodriguez D.; Chantot-Bastaraud S.; Rougeot C.; Cournelle M.A.; Milh M.; Toutain A.; Bacq D.; Meyer V.; Afenjar A.; Deleuze J.F.; Brice A.; Heron D.; Stevanin G.; Durr A.;
Neurology 84:1751-1759(2015)
Cited for: VARIANTS SCAR18 ASP-654; THR-654 AND VAL-656;
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.