Paralogue Annotation for SCN5A residue 1644

Residue details

Gene: SCN5A
Reference Sequences: LRG: LRG_289, Ensembl variant: ENST00000333535 / ENSP00000328968
Amino Acid Position: 1644
Reference Amino Acid: R - Arginine
Protein Domain: TM Domain 4


Paralogue Variants mapped to SCN5A residue 1644

ParalogueVariantAssociated DiseaseMapping QualityConsensusPubmed
SCN1AR1657CGeneralized epilepsy with febrile seizures plusHigh9 14672992
SCN1AR1657HCryptogenic focal epilepsyHigh9 17347258, 21719429
CACNA1AR1680CEpisodic ataxia 2High9 20129625

To assess whether the paralogue annotation here confidently predicts that variation at this residue is pathogenic, it is important to check the reports in the Pubmed links above to ascertain that the mutations in these paralogues have been proved likely to be disease-causing. It is also important to check that the direction of effect of the variant in the paralogue is compatible with your observed phenotype in SCN5A.



SCN5AKYFFSPTLFRVIRLARIGRILRLIRGAKGI>R<TLLFALMMSLPALFNIGLLLFLVMFIYSIF1674
SCN1AKYFVSPTLFRVIRLARIGRILRLIKGAKGI>R<TLLFALMMSLPALFNIGLLLFLVMFIYAIF1687
SCN2AKYFVSPTLFRVIRLARIGRILRLIKGAKGI>R<TLLFALMMSLPALFNIGLLLFLVMFIYAIF1677
SCN3AKYFVSPTLFRVIRLARIGRILRLIKGAKGI>R<TLLFALMMSLPALFNIGLLLFLVMFIYAIF1672
SCN4AKYFVSPTLFRVIRLARIGRVLRLIRGAKGI>R<TLLFALMMSLPALFNIGLLLFLVMFIYSIF1499
SCN7ASYLVPPSLVQLILLSRIIHMLRLGKGPKVF>H<NLMLPLMLSLPALLNIILLIFLVMFIYAVF1397
SCN8AKYFVSPTLFRVIRLARIGRILRLIKGAKGI>R<TLLFALMMSLPALFNIGLLLFLVMFIFSIF1668
SCN9ATYFVSPTLFRVIRLARIGRILRLVKGAKGI>R<TLLFALMMSLPALFNIGLLLFLVMFIYAIF1650
SCN10AQSYFSPTLFRVIRLARIGRILRLIRAAKGI>R<TLLFALMMSLPALFNIGLLLFLVMFIYSIF1624
SCN11AHIPFPPTLFRIVRLARIGRILRLVRAARGI>R<TLLFALMMSLPSLFNIGLLLFLIMFIYAIL1514
CACNA1A--FINLSFLRLFRA---ARLIKLLRQGYTI>R<ILLWTFVQSFKALPYVCLLIAMLFFIYAII1709
CACNA1BNNFINLSFLRLFRA---ARLIKLLRQGYTI>R<ILLWTFVQSFKALPYVCLLIAMLFFIYAII1617
CACNA1CNSRISITFFRLFRV---MRLVKLLSRGEGI>R<TLLWTFIKSFQALPYVALLIVMLFFIYAVI1377
CACNA1DSNRISITFFRLFRV---MRLVKLLSRGEGI>R<TLLWTFIKSFQALPYVALLIAMLFFIYAVI1387
CACNA1ETSGFNMSFLKLFRA---ARLIKLLRQGYTI>R<ILLWTFVQSFKALPYVCLLIAMLFFIYAII1624
CACNA1FSSRISITFFRLFRV---MRLVKLLSKGEGI>R<TLLWTFIKSFQALPYVALLIAMIFFIYAVI1344
CACNA1GSLPINPTIIRIMRVLRIARVLKLLKMAVGM>R<ALLDTVMQALPQVGNLGLLFMLLFFIFAAL1760
CACNA1HALPINPTIIRIMRVLRIARVLKLLKMATGM>R<ALLDTVVQALPQVGNLGLLFMLLFFIYAAL1766
CACNA1IALPINPTIIRIMRVLRIARVLKLLKMATGM>R<ALLDTVVQALPQVGNLGLLFMLLFFIYAAL1636
CACNA1SSARISSAFFRLFRV---MRLIKLLSRAEGV>R<TLLWTFIKSFQALPYVALLIVMLFFIYAVI1284
cons                              > <                              

See full Alignment of Paralogues


Known Variants in SCN5A

ProteinCDSDisease ClassificationDiseasedbSNP linksEffect Prediction
p.R1644Cc.4930C>T Inherited ArrhythmiaLQTS,BrSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaBrS Cardiac histological substrate in patients with clinical phenotype of Brugada syndrome. Circulation. 2005 112(24):3680-7. 16344400
Inherited ArrhythmiaLQTS Genetic testing in the long QT syndrome: development and validation of an efficient approach to genotyping in clinical practice. JAMA. 2005 294(23):2975-80. 16414944
Inherited ArrhythmiaLQTS Spectrum and prevalence of mutations from the first 2,500 consecutive unrelated patients referred for the FAMILION long QT syndrome genetic test. Heart Rhythm. 2009 6(9):1297-303. 19716085
p.R1644Hc.4931G>A Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS Cardiac sodium channel mutations in patients with long QT syndrome, an inherited cardiac arrhythmia. Hum Mol Genet. 1995 4(9):1603-7. 8541846
Inherited ArrhythmiaLQTS Spectrum of mutations in long-QT syndrome genes. KVLQT1, HERG, SCN5A, KCNE1, and KCNE2. Circulation. 2000 102(10):1178-85. 10973849
Inherited ArrhythmiaLQTS Compound mutations: a common cause of severe long-QT syndrome. Circulation. 2004 109(15):1834-41. 15051636
Inherited ArrhythmiaLQTS Compendium of cardiac channel mutations in 541 consecutive unrelated patients referred for long QT syndrome genetic testing. Heart Rhythm. 2005 2(5):507-17. 15840476
Inherited ArrhythmiaLQTS Genetic testing for long-QT syndrome: distinguishing pathogenic mutations from benign variants. Circulation. 2009 120(18):1752-60. 19841300
Inherited ArrhythmiaLQTS Multiple mechanisms of Na+ channel--linked long-QT syndrome. Circ Res. 1996 78(5):916-24. 8620612
Inherited ArrhythmiaLQTS Characterization of human cardiac Na+ channel mutations in the congenital long QT syndrome. Proc Natl Acad Sci U S A. 1996 93(23):13200-5. 8917568
p.R1644Lc.4931G>T Putative BenignSIFT:
Polyphen: