Paralogue Annotation for KCNH2 residue 420

Residue details

Gene: KCNH2
Reference Sequences: LRG: LRG_288, Ensembl variant: ENST00000262186 / ENSP00000262186
Amino Acid Position: 420
Reference Amino Acid: Y - Tyrosine
Protein Domain: Transmembrane/Linker/Pore


Paralogue Variants mapped to KCNH2 residue 420

ParalogueVariantAssociated DiseaseMapping QualityConsensusPubmed
CNGA3Y181CColour-blindness, totalHigh9 11536077, 23082193

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.



KCNH2QAPRIHRWTILHYSPFKA-VWDWLILLLVI>Y<TAVFTPYSAAFLLKETEEGPPATECGYACQ450
KCNH1EAPKTPPHIILHYCVFKT-TWDWIILILTF>Y<TAILVPYNVSFKTRQN------------NV248
KCNH3AAIRKSPFILLHCGALRA-TWDGFILLATL>Y<VAVTVPYSVCVSTARE--------PSAARG259
KCNH4ASVGGSRCLLLHYSVSKA-IWDGLILLATF>Y<VAVTVPYNVCFSGDDD--------TPITSR261
KCNH5EAPKTPPHIILHYCAFKT-TWDWVILILTF>Y<TAIMVPYNVSFKTKQN------------NI245
KCNH6QAPRIHRWTILHYSPFKA-VWDWLILLLVI>Y<TAVFTPYSAAFLLSDQDE-SRRGACSYTCS298
KCNH7QTPRINKFTILHYSPFKA-VWDWLILLLVI>Y<TAIFTPYSAAFLLNDREE-QKRRECGYSCS449
KCNH8SDAKKSKFILLHFSTFKA-GWDWLILLATF>Y<VAVTVPYNVCFIGNDD--------LS-TTR255
CNGA1EEEKKEVVVIDPSGNTYY-NWLFCITLPVM>Y<NWTMVIARACFDELQS----------DYLE198
CNGA2TKKKFELFVLDPAGDWYY-CWLFVIAMPVL>Y<NWCLLVARACFSDLQK----------GYYL173
CNGA3KTKKKDAIVVDPSSNLYY-RWLTAIALPVF>Y<NWYLLICRACFDELQS----------EYLM201
CNGA4SKARKLLPVLDPSGDYYY-WWLNTMVFPVM>Y<NLIILVCRACFPDLQH----------GYLV67
CNGB1-KKYQFPQSIDPLTNLMYVLWLFFVVMAWN>W<NCWLIPVRWAFPYQTP----------DNIH689
CNGB3LKRIKLPNSIDSYTDRLYLLWLLLVTLAYN>W<NCCFIPLRLVFPYQTA----------DNIH251
HCN1RVKTAGFWIIHPYSDFRF-YWDLIMLIMMV>G<NLVIIPVGITFFTEQT------------TT173
HCN2RVKSAGAWIIHPYSDFRF-YWDFTMLLFMV>G<NLIIIPVGITFFKDET------------TA242
HCN3RVKSAGAWIIHPYSDFRF-YWDLIMLLLMV>G<NLIVLPVGITFFKEEN------------SP124
HCN4RVKSAGFWIIHPYSDFRF-YWDLTMLLLMV>G<NLIIIPVGITFFKDEN------------TT293
cons                              > <                              

See full Alignment of Paralogues


Known Variants in KCNH2

ProteinCDSDisease ClassificationDiseasedbSNP linksEffect Prediction
p.Y420Cc.1259A>G Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited 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 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