Paralogue Annotation for KCNH2 residue 473

Residue details

Gene: KCNH2
Reference Sequences: LRG: LRG_288, Ensembl variant: ENST00000262186 / ENSP00000262186
Amino Acid Position: 473
Reference Amino Acid: T - Threonine
Protein Domain: Transmembrane/Linker/Pore


Paralogue Variants mapped to KCNH2 residue 473

ParalogueVariantAssociated DiseaseMapping QualityConsensusPubmed
CNGA3T224RColour-blindness, totalHigh9 11536077
CNGA3T224ICone dystrophyHigh9 24903488

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 KCNH2.



KCNH2ECGYACQPLAVVDLIVDIMFIVDI-LINFR>T<TYVN-ANEEVVSHPGRIAVHYFKGW-FLID501
KCNH1-----NVAWLVVDSIVDVIFLVDI-VLNFH>T<TFVG-PAGEVISDPKLIRMNYLKTW-FVID299
KCNH3-PSAARGPPSVCDLAVEVLFILDI-VLNFR>T<TFVS-KSGQVVFAPKSICLHYVTTW-FLLD310
KCNH4-TPITSRHTLVSDIAVEMLFILDI-ILNFR>T<TYVS-QSGQVISAPRSIGLHYLATW-FFID312
KCNH5-----NIAWLVLDSVVDVIFLVDI-VLNFH>T<TFVG-PGGEVISDPKLIRMNYLKTW-FVID296
KCNH6ACSYTCSPLTVVDLIVDIMFVVDI-VINFR>T<TYVN-TNDEVVSHPRRIAVHYFKGW-FLID349
KCNH7ECGYSCSPLNVVDLIVDIMFIIDI-LINFR>T<TYVN-QNEEVVSDPAKIAIHYFKGW-FLID500
KCNH8-LS-TTRSTTVSDIAVEILFIIDI-ILNFR>T<TYVS-KSGQVIFEARSICIHYVTTW-FIID306
CNGA1---DYLEYWLILDYVSDIVYLIDM-FVRTR>T<GYLE--QGLLVKEELKLINKYKSNLQFKLD249
CNGA2---GYYLVWLVLDYVSDVVYIADL-FIRLR>T<GFLE--QGLLVKDTKKLRDNYIHTLQFKLD224
CNGA3---EYLMLWLVLDYSADVLYVLDV-LVRAR>T<GFLE--QGLMVSDTNRLWQHYKTTTQFKLD252
CNGA4---GYLVAWLVLDYTSDLLYLLDM-VVRFH>T<GFLE--QGILVVDKGRISSRYVRTWSFFLD118
CNGB1---DNIHHWLLMDYLCDLIYFLDITVFQTR>L<QFVR--GGDIITDKKDMRNNYLKSRRFKMD741
CNGB3---DNIHYWLIADIICDIIYLYDMLFIQPR>L<QFVR--GGDIIVDSNELRKHYRTSTKFQLD303
HCN1-----TTPWIIFNVASDTVFLLDL-IMNFR>T<GTVNEDSSEIILDPKVIKMNYLKSW-FVVD225
HCN2-----TAPWIVFNVVSDTFFLMDL-VLNFR>T<GIVIEDNTEIILDPEKIKKKYLRTW-FVVD294
HCN3-----SPPWIVFNVLSDTFFLLDL-VLNFR>T<GIVVEEGAEILLAPRAIRTRYLRTW-FLVD176
HCN4-----TTPWIVFNVVSDTFFLIDL-VLNFR>T<GIVVEDNTEIILDPQRIKMKYLKSW-FMVD345
cons                              > <                              

See full Alignment of Paralogues


Known Variants in KCNH2

ProteinCDSDisease ClassificationDiseasedbSNP linksEffect Prediction
p.T473Nc.1418C>A Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited 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.T473Pc.1417A>C Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS Long QT syndrome with compound mutations is associated with a more severe phenotype: a Japanese multicenter study. Heart Rhythm. 2010 7(10):1411-8. 20541041
Inherited ArrhythmiaLQTS A novel mutation in the transmembrane nonpore region of the KCNH2 gene causes severe clinical manifestations of long QT syndrome. Heart Rhythm. 2013 10(1):61-7. doi: 10.1016/j.hrthm.2012.09.053. 23010577