UniProtKB/Swiss-Prot P35499: Variant p.Val781Ile

Sodium channel protein type 4 subunit alpha
Gene: SCN4A
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Variant information Variant position:

781 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant:

LB/B 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 Valine (V) to Isoleucine (I) at position 781 (V781I, p.Val781Ile). 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:

3 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:

Voltage-gated sodium channel activity is not affected and channel activation as well as fast and slow inactivation curves are normal. Any additional useful information about the variant.
Other resources:

Links to websites of interest for the variant.

Variant rs62070884 [ dbSNP | Ensembl ]

Sequence information Variant position:

781 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length:

1836 The length of the canonical sequence.
Location on the sequence:

EWIETMWDCMEVAGQAMCLT V FLMVMVIGNLVVLNLFLALL 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                         EWIETMWDCMEVAGQAMCLTVFLMVMVIGNLVVLNLFLALL

Mouse                         EWIETMWDCMEVAGQAMCLTVFLMVMVIGNLVVLNLFLALL

Rat                           EWIETMWDCMEVAGQAMCLTVFLMVMVIGNLVVLNLFLALL

Horse                         EWIEPMWGFMEVAGQAMFLTVLLMVMVNGNLVDLDLFLALL

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 – 1836	Sodium channel protein type 4 subunit alpha
Transmembrane	779 – 797	Helical; Name=S6 of repeat II
Repeat	560 – 832	II
Helix	775 – 802

Literature citations
Hyperkalemic periodic paralysis with cardiac dysrhythmia: a novel sodium channel mutation?
Baquero J.L.; Ayala R.A.; Wang J.; Curless R.G.; Feero W.G.; Hoffman E.P.; Ebeid M.R.;
Ann. Neurol. 37:408-411(1995)
Cited for: VARIANT ILE-781; A proposed mutation, Val781Ile, associated with hyperkalemic periodic paralysis and cardiac dysrhythmia is a benign polymorphism.
Green D.S.; Hayward L.J.; George A.L. Jr.; Cannon S.C.;
Ann. Neurol. 42:253-256(1997)
Cited for: VARIANT ILE-781; Mutations of sodium channel alpha-subunit genes in Chinese patients with normokalemic periodic paralysis.
Xiuhai G.; Weiping W.; Ke Z.; Hongbin W.; Yiling S.; Yanling M.;
Cell. Mol. Neurobiol. 28:653-661(2008)
Cited for: VARIANTS NKPP GLN-675 AND VAL-1592; VARIANT ILE-781; Analysis of protein-coding genetic variation in 60,706 humans.
Lek M.; Karczewski K.J.; Minikel E.V.; Samocha K.E.; Banks E.; Fennell T.; O'Donnell-Luria A.H.; Ware J.S.; Hill A.J.; Cummings B.B.; Tukiainen T.; Birnbaum D.P.; Kosmicki J.A.; Duncan L.E.; Estrada K.; Zhao F.; Zou J.; Pierce-Hoffman E.; Berghout J.; Cooper D.N.; Deflaux N.; DePristo M.; Do R.; Flannick J.; Fromer M.; Gauthier L.; Goldstein J.; Gupta N.; Howrigan D.; Kiezun A.; Kurki M.I.; Moonshine A.L.; Natarajan P.; Orozco L.; Peloso G.M.; Poplin R.; Rivas M.A.; Ruano-Rubio V.; Rose S.A.; Ruderfer D.M.; Shakir K.; Stenson P.D.; Stevens C.; Thomas B.P.; Tiao G.; Tusie-Luna M.T.; Weisburd B.; Won H.H.; Yu D.; Altshuler D.M.; Ardissino D.; Boehnke M.; Danesh J.; Donnelly S.; Elosua R.; Florez J.C.; Gabriel S.B.; Getz G.; Glatt S.J.; Hultman C.M.; Kathiresan S.; Laakso M.; McCarroll S.; McCarthy M.I.; McGovern D.; McPherson R.; Neale B.M.; Palotie A.; Purcell S.M.; Saleheen D.; Scharf J.M.; Sklar P.; Sullivan P.F.; Tuomilehto J.; Tsuang M.T.; Watkins H.C.; Wilson J.G.; Daly M.J.; MacArthur D.G.;
Nature 536:285-291(2016)
Cited for: VARIANT ILE-781;

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.