Home  |  Contact

UniProtKB/Swiss-Prot P47869: Variant p.Leu291Val

Gamma-aminobutyric acid receptor subunit alpha-2
Gene: GABRA2
Variant information

Variant position:  291
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  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:  From Leucine (L) to Valine (V) at position 291 (L291V, p.Leu291Val).
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:  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:  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:  In DEE78; impaired GABA-gated chloride ion channel activity.
Any additional useful information about the variant.



Sequence information

Variant position:  291
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  451
The length of the canonical sequence.

Location on the sequence:   SFWLNRESVPARTVFGVTTV  L TMTTLSISARNSLPKVAYAT
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                         SFWLNRESVPARTVFGVTTVLTMTTLSISARNSLPKVAYAT

Mouse                         SFWLNRESVPARTVFGVTTVLTMTTLSISARNSLPKVAYAT

Rat                           SFWLNRESVPARTVFGVTTVLTMTTLSISARNSLPKVAYAT

Bovine                        SFWLNRESVPARTVFGVTTVLTMTTLSISARNSLPKVAYAT

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 29 – 451 Gamma-aminobutyric acid receptor subunit alpha-2
Transmembrane 279 – 300 Helical


Literature citations

Novel GABRA2 variants in epileptic encephalopathy and intellectual disability with seizures.
Maljevic S.; Keren B.; Aung Y.H.; Forster I.C.; Mignot C.; Buratti J.; Lafitte A.; Freihuber C.; Rodan L.H.; Bergin A.; Hubert L.; Poirier K.; Munnich A.; Besmond C.; Hauser N.; Miller R.; McWalter K.; Nabbout R.; Heron D.; Leguern E.; Depienne C.; Petrou S.; Nava C.;
Brain 142:E15-E15(2019)
Cited for: FUNCTION; INVOLVEMENT IN DEE78; VARIANTS DEE78 THR-263; ALA-284; VAL-291 AND LEU-325; CHARACTERIZATION OF VARIANTS DEE78 THR-263; ALA-284; VAL-291 AND LEU-325;

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.