UniProtKB/SwissProt variant VAR

Variant information

Variant position:

1650

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 Alanine (A) to Threonine (T) at position 1650 (A1650T, p.Ala1650Thr).

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 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:

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:

In DEE13.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs879255709 [ dbSNP | Ensembl ]

Sequence information

Variant position:

1650

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

Protein sequence length:

1980

The length of the canonical sequence.

Location on the sequence:

LIKGAKGIRTLLFALMMSLP A LFNIGLLLFLVMFIFSIFGM

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                         LIKGAKGIRTLLFALMMSLPALFNIGLLLFLVMFIFSIFGM

Mouse                         LIKGAKGIRTLLFALMMSLPALFNIGLLLFLVMFIFSIFGM

Rat                           LIKGAKGIRTLLFALMMSLPALFNIGLLLFLVMFIFSIFGM

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.

Type	Positions	Description
Chain	1 – 1980	Sodium channel protein type 8 subunit alpha
Topological domain	1632 – 1650	Cytoplasmic
Repeat	1504 – 1801	IV
Alternative sequence	1284 – 1980	Missing. In isoform 4.

Literature citations

Early onset epileptic encephalopathy caused by de novo SCN8A mutations.
Ohba C.; Kato M.; Takahashi S.; Lerman-Sagie T.; Lev D.; Terashima H.; Kubota M.; Kawawaki H.; Matsufuji M.; Kojima Y.; Tateno A.; Goldberg-Stern H.; Straussberg R.; Marom D.; Leshinsky-Silver E.; Nakashima M.; Nishiyama K.; Tsurusaki Y.; Miyake N.; Tanaka F.; Matsumoto N.; Saitsu H.;
Epilepsia 55:994-1000(2014)
Cited for: VARIANTS DEE13 ASP-216; SER-846; LYS-1466; THR-1466; GLN-1617; THR-1650 AND TRP-1872;

The phenotypic spectrum of SCN8A encephalopathy.
Larsen J.; Carvill G.L.; Gardella E.; Kluger G.; Schmiedel G.; Barisic N.; Depienne C.; Brilstra E.; Mang Y.; Nielsen J.E.; Kirkpatrick M.; Goudie D.; Goldman R.; Jaehn J.A.; Jepsen B.; Gill D.; Doecker M.; Biskup S.; McMahon J.M.; Koeleman B.; Harris M.; Braun K.; de Kovel C.G.; Marini C.; Specchio N.; Djemie T.; Weckhuysen S.; Tommerup N.; Troncoso M.; Troncoso L.; Bevot A.; Wolff M.; Hjalgrim H.; Guerrini R.; Scheffer I.E.; Mefford H.C.; Moeller R.S.;
Neurology 84:480-489(2015)
Cited for: VARIANTS DEE13 ARG-215; SER-260; LEU-410; VAL-479; THR-890; ASP-960; VAL-1331; VAL-1479; LEU-1592; ARG-1605; GLN-1617; THR-1650; GLU-1801; GLN-1872 AND TRP-1872;

Diagnostic targeted resequencing in 349 patients with drug-resistant pediatric epilepsies identifies causative mutations in 30 different genes.
Parrini E.; Marini C.; Mei D.; Galuppi A.; Cellini E.; Pucatti D.; Chiti L.; Rutigliano D.; Bianchini C.; Virdo S.; De Vita D.; Bigoni S.; Barba C.; Mari F.; Montomoli M.; Pisano T.; Rosati A.; Guerrini R.;
Hum. Mutat. 38:216-225(2017)
Cited for: VARIANTS DEE13 SER-307; GLY-978; ARG-1475; THR-1650 AND TRP-1872; VARIANT SER-1877;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9UQD0: Variant p.Ala1650Thr