Paralogue Annotation for KCNQ1 residue 242

Residue details

Gene: KCNQ1
Reference Sequences: LRG: LRG_287, Ensembl variant: ENST00000155840 / ENSP00000155840
Amino Acid Position: 242
Reference Amino Acid: D - Aspartate
Protein Domain: Transmembrane/Linker/Pore


Paralogue Variants mapped to KCNQ1 residue 242

ParalogueVariantAssociated DiseaseMapping QualityConsensusPubmed
KCNQ2D212GEpilepsy, benign neonatalHigh9 19344764, 22455920
KCNC3T428ICerebral palsy, ataxicMedium9 24030952, 25981959

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.



KCNQ1-----SKGQVFATSAIRGIRFLQILRMLHV>D<RQGGTWRLLGSVVFIHRQELITTLYIGFLG272
KCNQ2-----SQGNVFATSALRSLRFLQILRMIRM>D<RRGGTWKLLGSVVYAHSKELVTAWYIGFLC242
KCNQ3-----NQGNVLA-TSLRSLRFLQILRMLRM>D<RRGGTWKLLGSAICAHSKELITAWYIGFLT271
KCNQ4-----TQGNIFATSALRSMRFLQILRMVRM>D<RRGGTWKLLGSVVYAHSKELITAWYIGFLV248
KCNQ5-----TQGNIFATSALRSLRFLQILRMVRM>D<RRGGTWKLLGSVVYAHSKELITAWYIGFLV276
KCNA1--N-QKGEQATSLAILRVIRLVRVFRIFKL>S<RHSKGLQILGQTLKASMRELGLLIFFLFIG336
KCNA10-----SAQQNMSLAILRIIRLVRVFRIFKL>S<RHSKGLQILGQTLKASMRELGLLIFFLFIG385
KCNA2--DAQQGQQAMSLAILRVIRLVRVFRIFKL>S<RHSKGLQILGQTLKASMRELGLLIFFLFIG338
KCNA3----GNGQQAMSLAILRVIRLVRVFRIFKL>S<RHSKGLQILGQTLKASMRELGLLIFFLFIG408
KCNA4--GNGQQQQAMSFAILRIIRLVRVFRIFKL>S<RHSKGLQILGHTLRASMRELGLLIFFLFIG488
KCNA5GGGGQNGQQAMSLAILRVIRLVRVFRIFKL>S<RHSKGLQILGKTLQASMRELGLLIFFLFIG444
KCNA6GGGGQNGQQAMSLAILRVIRLVRVFRIFKL>S<RHSKGLQILGKTLQASMRELGLLIFFLFIG386
KCNA7----GVGQQAMSLAILRVIRLVRVFRIFKL>S<RHSKGLQILGQTLRASMRELGLLIFFLFIG322
KCNB1---KSVLQFQNVRRVVQIFRIMRILRILKL>A<RHSTGLQSLGFTLRRSYNELGLLILFLAMG341
KCNB2---KSVLQFQNVRRVVQIFRIMRILRILKL>A<RHSTGLQSLGFTLRRSYNELGLLILFLAMG345
KCNC1---LSSKAAKDVLGFLRVVRFVRILRIFKL>T<RHFVGLRVLGHTLRASTNEFLLLIIFLALG355
KCNC2---LSSKAAKDVLGFLRVVRFVRILRIFKL>T<RHFVGLRVLGHTLRASTNEFLLLIIFLALG392
KCNC3---LSSKAAKDVLGFLRVVRFVRILRIFKL>T<RHFVGLRVLGHTLRASTNEFLLLIIFLALG458
KCNC4---LSSKAARDVLGFLRVVRFVRILRIFKL>T<RHFVGLRVLGHTLRASTNEFLLLIIFLALG391
KCND1-------KNDDVSGAFVTLRVFRVFRIFKF>S<RHSQGLRILGYTLKSCASELGFLLFSLTMA336
KCND2-------DNEDVSGAFVTLRVFRVFRIFKF>S<RHSQGLRILGYTLKSCASELGFLLFSLTMA334
KCND3-------NNEDVSGAFVTLRVFRVFRIFKF>S<RHSQGLRILGYTLKSCASELGFLLFSLTMA331
KCNF1--GARMMELTNVQQAVQALRIMRIARIFKL>A<RHSSGLQTLTYALKRSFKELGLLLMYLAVG334
KCNG1KPGAGNSYLDKVGLVLRVLRALRILYVMRL>A<RHSLGLQTLGLTARRCTREFGLLLLFLCVA387
KCNG2AGPGGTKLLERAGLVLRLLRALRVLYVMRL>A<RHSLGLRSLGLTMRRCAREFGLLLLFLCVA332
KCNG3-FTGENSQLQRAGVTLRVLRMMRIFWVIKL>A<RHFIGLQTLGLTLKRCYREMVMLLVFICVA333
KCNG4ERPSGSSYLEKVGLVLRVLRALRILYVMRL>A<RHSLGLQTLGLTVRRCTREFGLLLLFLAVA381
KCNS1---QGGKEFGHLGKVVQVFRLMRIFRVLKL>A<RHSTGLRSLGATLKHSYREVGILLLYLAVG386
KCNS2---ESTPTLANLGRVAQVLRLMRIFRILKL>A<RHSTGLRSLGATLKYSYKEVGLLLLYLSVG339
KCNS3---EESEDIENMGKVVQILRLMRIFRILKL>A<RHSVGLRSLGATLRHSYHEVGLLLLFLSVG334
KCNV1---QTTQELENVGRIVQVLRLLRALRMLKL>G<RHSTGLRSLGMTITQCYEEVGLLLLFLSVG356
KCNV2QRGQTVGSVGKVGQVLRVMRLMRIFRILKL>A<RHSTGLRAFGFTLRQCYQQVGCLLLFIAMG421
cons                              > <                              

See full Alignment of Paralogues


Known Variants in KCNQ1

ProteinCDSDisease ClassificationDiseasedbSNP linksEffect Prediction
p.D242Nc.724G>A Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS Genomic organization and mutational analysis of KVLQT1, a gene responsible for familial long QT syndrome. Hum Genet. 1998 103(3):290-4. 9799083
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 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 RNA splicing. The human splicing code reveals new insights into the genetic determinants of disease. Science. 2015 347(6218):1254806. doi: 10.1126/science.1254806. 25525159
p.D242Yc.724G>T Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS Mutations in conserved amino acids in the KCNQ1 channel and risk of cardiac events in type-1 long-QT syndrome. J Cardiovasc Electrophysiol. 2009 20(8):859-65. 19490272
Inherited ArrhythmiaLQTS RNA splicing. The human splicing code reveals new insights into the genetic determinants of disease. Science. 2015 347(6218):1254806. doi: 10.1126/science.1254806. 25525159