Paralogue Annotation for KCNQ1 residue 343

Residue details

Gene: KCNQ1
Reference Sequences: LRG: LRG_287, Ensembl variant: ENST00000155840 / ENSP00000155840
Amino Acid Position: 343
Reference Amino Acid: P - Proline
Protein Domain: Transmembrane/Linker/Pore


Paralogue Variants mapped to KCNQ1 residue 343

ParalogueVariantAssociated DiseaseMapping QualityConsensusPubmed
KCNA2P405LEpileptic encephalopathyHigh9 25751627, 25751627

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 KCNQ1.



KCNQ1IGYGDKVPQTWVGKTIASCFSVFAISFFAL>P<AGILGSGFALKVQQKQRQKHFNRQIPA--A371
KCNQ2IGYGDKYPQTWNGRLLAATFTLIGVSFFAL>P<AGILGSGFALKVQEQHRQKHFEKRRNP--A336
KCNQ3IGYGDKTPKTWEGRLIAATFSLIGVSFFAL>P<AGILGSGLALKVQEQHRQKHFEKRRKP--A375
KCNQ4IGYGDKTPHTWLGRVLAAGFALLGISFFAL>P<AGILGSGFALKVQEQHRQKHFEKRRMP--A342
KCNQ5IGYGDKTPLTWLGRLLSAGFALLGISFFAL>P<AGILGSGFALKVQEQHRQKHFEKRRNP--A370
KCNA1VGYGDMYPVTIGGKIVGSLCAIAGVLTIAL>P<VPVIVSNFNYFYHRETEGEEQAQLLH----429
KCNA10VGYGDMCPTTPGGKIVGTLCAIAGVLTIAL>P<VPVIVSNFNYFYHRETENEEKQNIPGEIER482
KCNA2VGYGDMVPTTIGGKIVGSLCAIAGVLTIAL>P<VPVIVSNFNYFYHRETEGEEQAQYLQ----431
KCNA3VGYGDMHPVTIGGKIVGSLCAIAGVLTIAL>P<VPVIVSNFNYFYHRETEGEEQSQYMH----501
KCNA4VGYGDMKPITVGGKIVGSLCAIAGVLTIAL>P<VPVIVSNFNYFYHRETENEEQTQLTQ----581
KCNA5VGYGDMRPITVGGKIVGSLCAIAGVLTIAL>P<VPVIVSNFNYFYHRETDHEEPAVLKEE--Q539
KCNA6VGYGDMYPMTVGGKIVGSLCAIAGVLTIAL>P<VPVIVSNFNYFYHRETEQEEQGQYTHV---480
KCNA7VGYGDMAPVTVGGKIVGSLCAIAGVLTISL>P<VPVIVSNFSYFYHRETEGEEAGMFSHV---416
KCNB1VGYGDIYPKTLLGKIVGGLCCIAGVLVIAL>P<IPIIVNNFSEFYKEQKRQEKAIKRREA--L436
KCNB2VGYGDIYPKTLLGKIVGGLCCIAGVLVIAL>P<IPIIVNNFSEFYKEQKRQEKAIKRREA--L440
KCNC1LGYGDMYPQTWSGMLVGALCALAGVLTIAM>P<VPVIVNNFGMYYSLAMAKQKLPKKKKK--H459
KCNC2LGYGDMYPQTWSGMLVGALCALAGVLTIAM>P<VPVIVNNFGMYYSLAMAKQKLPRKRKK--H496
KCNC3LGYGDMYPKTWSGMLVGALCALAGVLTIAM>P<VPVIVNNFGMYYSLAMAKQKLPKKKNK--H562
KCNC4LGYGDMYPKTWSGMLVGALCALAGVLTIAM>P<VPVIVNNFGMYYSLAMAKQKLPKKRKK--H495
KCND1LGYGDMVPSTIAGKIFGSICSLSGVLVIAL>P<VPVIVSNFSRIYHQNQRADKRRAQQKV--R431
KCND2LGYGDMVPKTIAGKIFGSICSLSGVLVIAL>P<VPVIVSNFSRIYHQNQRADKRRAQKKA--R429
KCND3LGYGDMVPKTIAGKIFGSICSLSGVLVIAL>P<VPVIVSNFSRIYHQNQRADKRRAQKKA--R426
KCNF1VGYGDIYPKTTLGKLNAAISFLCGVIAIAL>P<IHPIINNFVRYYNKQRVLETAAKHELE--L429
KCNG1VGYGDMVPRSTPGQVVALSSILSGILLMAF>P<VTSIFHTFSRSYLELKQEQERVMFRRA--Q483
KCNG2VGYGDMVPRSLPGQVVALSSILSGILLMAF>P<VTSIFHTFSRSYSELKEQQQRAASPEP--A428
KCNG3VGYGDMYPITVPGRILGGVCVVSGIVLLAL>P<ITFIYHSFVQCYHELKFRSARYSR------428
KCNG4VGYGDMVPRSVPGQMVALSSILSGILIMAF>P<ATSIFHTFSHSYLELKKEQEQLQARLR--H477
KCNS1VGYGDVVPVTVAGKLAASGCILGGILVVAL>P<ITIIFNKFSHFYRRQKALEAAVRNSNH--Q480
KCNS2VGYGDVVPGTTAGKLTASACILAGILVVVL>P<ITLIFNKFSHFYRRQKQLESAMRSCDF--G433
KCNS3VGYGDTHPVTLAGKLIASTCIICGILVVAL>P<ITIIFNKFSKYYQKQKDIDVDQCSEDA--P429
KCNV1VGYGDIRPDTTTGKIVAFMCILSGILVLAL>P<IAIINDRFSACYFTLKLKEAAVRQREA--L451
KCNV2VGYGDMYPETHLGRFFAFLCIAFGIILNGM>P<ISILYNKFSDYYSKLKAYEYTTIRRER--G516
cons                              > <                              

See full Alignment of Paralogues


Known Variants in KCNQ1

ProteinCDSDisease ClassificationDiseasedbSNP linksEffect Prediction
p.P343Lc.1028C>T Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited 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
Inherited ArrhythmiaLQTS Genetic testing for long-QT syndrome: distinguishing pathogenic mutations from benign variants. Circulation. 2009 120(18):1752-60. 19841300
Inherited ArrhythmiaLQTS Phylogenetic and physicochemical analyses enhance the classification of rare nonsynonymous single nucleotide variants in type 1 and 2 long-QT syndrome. Circ Cardiovasc Genet. 2012 5(5):519-28. doi: 10.1161/CIRCGENETICS.112.963785. 22949429
p.P343Rc.1028C>G Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited 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
p.P343Sc.1027C>T Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS Spectrum and frequency of cardiac channel defects in swimming-triggered arrhythmia syndromes. Circulation. 2004 110(15):2119-24. 15466642
Inherited ArrhythmiaLQTS Identification and characterisation of a novel KCNQ1 mutation in a family with Romano-Ward syndrome. Biochim Biophys Acta. 2004 1690(3):185-92. 15511625
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 Clinical aspects of type-1 long-QT syndrome by location, coding type, and biophysical function of mutations involving the KCNQ1 gene. Circulation. 2007 115(19):2481-9. 17470695