Paralogue Annotation for KCNQ1 residue 322

Residue details

Gene: KCNQ1
Reference Sequences: LRG: LRG_287, Ensembl variant: ENST00000155840 / ENSP00000155840
Amino Acid Position: 322
Reference Amino Acid: T - Threonine
Protein Domain: Transmembrane/Linker/Pore


Paralogue Variants mapped to KCNQ1 residue 322

ParalogueVariantAssociated DiseaseMapping QualityConsensusPubmed
KCND3T377MSpinocerebellar ataxia 22High9 23280837
KCNQ2T287NEpileptic encephalopathy, early-onsetHigh9 23692823

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.



KCNQ1GRVEFGSYADALWWGVVTVTTIGYGDKVPQ>T<WVGKTIASCFSVFAISFFALPAGILGSGFA352
KCNQ2-NDHFDTYADALWWGLITLTTIGYGDKYPQ>T<WNGRLLAATFTLIGVSFFALPAGILGSGFA317
KCNQ3MKEEFETYADALWWGLITLATIGYGDKTPK>T<WEGRLIAATFSLIGVSFFALPAGILGSGLA356
KCNQ4-NSDFSSYADSLWWGTITLTTIGYGDKTPH>T<WLGRVLAAGFALLGISFFALPAGILGSGFA323
KCNQ5-NKEFSTYADALWWGTITLTTIGYGDKTPL>T<WLGRLLSAGFALLGISFFALPAGILGSGFA351
KCNA1AESHFSSIPDAFWWAVVSMTTVGYGDMYPV>T<IGGKIVGSLCAIAGVLTIALPVPVIVSNFN412
KCNA10PESHFSSIPDGFWWAVVTMTTVGYGDMCPT>T<PGGKIVGTLCAIAGVLTIALPVPVIVSNFN461
KCNA2RESQFPSIPDAFWWAVVSMTTVGYGDMVPT>T<IGGKIVGSLCAIAGVLTIALPVPVIVSNFN414
KCNA3PTSGFSSIPDAFWWAVVTMTTVGYGDMHPV>T<IGGKIVGSLCAIAGVLTIALPVPVIVSNFN484
KCNA4PTTHFQSIPDAFWWAVVTMTTVGYGDMKPI>T<VGGKIVGSLCAIAGVLTIALPVPVIVSNFN564
KCNA5QGTHFSSIPDAFWWAVVTMTTVGYGDMRPI>T<VGGKIVGSLCAIAGVLTIALPVPVIVSNFN520
KCNA6DDSLFPSIPDAFWWAVVTMTTVGYGDMYPM>T<VGGKIVGSLCAIAGVLTIALPVPVIVSNFN462
KCNA7VDSHFTSIPESFWWAVVTMTTVGYGDMAPV>T<VGGKIVGSLCAIAGVLTISLPVPVIVSNFS398
KCNB1DDTKFKSIPASFWWATITMTTVGYGDIYPK>T<LLGKIVGGLCCIAGVLVIALPIPIIVNNFS417
KCNB2DATKFTSIPASFWWATITMTTVGYGDIYPK>T<LLGKIVGGLCCIAGVLVIALPIPIIVNNFS421
KCNC1EHTHFKNIPIGFWWAVVTMTTLGYGDMYPQ>T<WSGMLVGALCALAGVLTIAMPVPVIVNNFG440
KCNC2EHTQFKNIPIGFWWAVVTMTTLGYGDMYPQ>T<WSGMLVGALCALAGVLTIAMPVPVIVNNFG477
KCNC3NHTYFKNIPIGFWWAVVTMTTLGYGDMYPK>T<WSGMLVGALCALAGVLTIAMPVPVIVNNFG543
KCNC4DHTDFKNIPIGFWWAVVTMTTLGYGDMYPK>T<WSGMLVGALCALAGVLTIAMPVPVIVNNFG476
KCND1NKTNFTSIPAAFWYTIVTMTTLGYGDMVPS>T<IAGKIFGSICSLSGVLVIALPVPVIVSNFS412
KCND2SASKFTSIPAAFWYTIVTMTTLGYGDMVPK>T<IAGKIFGSICSLSGVLVIALPVPVIVSNFS410
KCND3SASKFTSIPASFWYTIVTMTTLGYGDMVPK>T<IAGKIFGSICSLSGVLVIALPVPVIVSNFS407
KCNF1PETLFKSIPQSFWWAIITMTTVGYGDIYPK>T<TLGKLNAAISFLCGVIAIALPIHPIINNFV410
KCNG1DSPEFTSIPACYWWAVITMTTVGYGDMVPR>S<TPGQVVALSSILSGILLMAFPVTSIFHTFS464
KCNG2ARRDFSSVPASYWWAVISMTTVGYGDMVPR>S<LPGQVVALSSILSGILLMAFPVTSIFHTFS409
KCNG3SNKDFTSIPAACWWVIISMTTVGYGDMYPI>T<VPGRILGGVCVVSGIVLLALPITFIYHSFV413
KCNG4RVLEFTSIPASYWWAIISMTTVGYGDMVPR>S<VPGQMVALSSILSGILIMAFPATSIFHTFS458
KCNS1-DVGFNTIPACWWWGTVSMTTVGYGDVVPV>T<VAGKLAASGCILGGILVVALPITIIFNKFS461
KCNS2-NEGLATIPACWWWATVSMTTVGYGDVVPG>T<TAGKLTASACILAGILVVVLPITLIFNKFS414
KCNS3HTSSLTSIPICWWWATISMTTVGYGDTHPV>T<LAGKLIASTCIICGILVVALPITIIFNKFS410
KCNV1PDTTFTSVPCAWWWATTSMTTVGYGDIRPD>T<TTGKIVAFMCILSGILVLALPIAIINDRFS432
KCNV2PSTNFTTIPHSWWWAAVSISTVGYGDMYPE>T<HLGRFFAFLCIAFGIILNGMPISILYNKFS497
cons                              > <                              

See full Alignment of Paralogues


Known Variants in KCNQ1

ProteinCDSDisease ClassificationDiseasedbSNP linksEffect Prediction
p.T322Ac.964A>G Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS Catecholamine-provoked microvoltage T wave alternans in genotyped long QT syndrome. Pacing Clin Electrophysiol. 2003 26(8):1660-7. 12877697
Inherited ArrhythmiaLQTS Spectrum and frequency of cardiac channel defects in swimming-triggered arrhythmia syndromes. Circulation. 2004 110(15):2119-24. 15466642
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 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
Inherited ArrhythmiaLQTS High-risk long QT syndrome mutations in the Kv7.1 (KCNQ1) pore disrupt the molecular basis for rapid K(+) permeation. Biochemistry. 2012 51(45):9076-85. doi: 10.1021/bi3009449. 23092362
p.T322Kc.965C>A Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS The genetic basis of long QT and short QT syndromes: a mutation update. Hum Mutat. 2009 30(11):1486-511. 19862833
p.T322Mc.965C>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 Identification of a novel KCNQ1 mutation associated with both Jervell and Lange-Nielsen and Romano-Ward forms of long QT syndrome in a Chinese family. BMC Med Genet. 2008 9:24. 18400097
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 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
Inherited ArrhythmiaLQTS High-risk long QT syndrome mutations in the Kv7.1 (KCNQ1) pore disrupt the molecular basis for rapid K(+) permeation. Biochemistry. 2012 51(45):9076-85. doi: 10.1021/bi3009449. 23092362
p.Thr322Argc.965C>G UnknownSIFT:
Polyphen: