Paralogue Annotation for KCNH2 residue 584

Residue details

Gene: KCNH2
Reference Sequences: LRG: LRG_288, Ensembl variant: ENST00000262186 / ENSP00000262186
Amino Acid Position: 584
Reference Amino Acid: G - Glycine
Protein Domain: Transmembrane/Linker/Pore


Paralogue Variants mapped to KCNH2 residue 584

ParalogueVariantAssociated DiseaseMapping QualityConsensusPubmed
CNGA3S334FCone dystrophyMedium8 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.



KCNH2ALIAHWLACIWYAIGNMEQPHMDSR----I>G<WLHNLGDQIGKPYNSS----------G---601
KCNH1GLAAHWMACIWYSIGDYEIFDEDTKTIRNN>S<WLYQLAMDIGTPYQFN--------GSG---436
KCNH3ALLAHWVACVWFYIGQREIESSESELPE-I>G<WLQELARRLETPYYLVGRRPAGGNSSGQSD427
KCNH4ALLAHWMACIWYVIGRREMEANDPLLWD-I>G<WLHELGKRLEVPYVNG--------------415
KCNH5GLVAHWLACIWYSIGDYEVIDEVTNTIQID>S<WLYQLALSIGTPYRYN--------T-S---405
KCNH6ALIAHWLACIWYAIGNVERPYLEHK----I>G<WLDSLGVQLGKRYNGS----------D---452
KCNH7ALIAHWLACIWYAIGNVERPYLTDK----I>G<WLDSLGQQIGKRYNDS----------D---603
KCNH8ALLAHWMACIWYVIGKMEREDNSLLKWE-V>G<WLHELGKRLESPYYGNN-------------410
CNGA1VIIIHWNACVFYSISKAIGFGND------->T<WVYPD---INDP------------------340
CNGA2LVIIHWNACIYYAISKSIGFGVD------->T<WVYPN---ITDP------------------315
CNGA3LIIIHWNACIYFAISKFIGFGTD------->S<WVYPN---ISIP------------------343
CNGA4FVVIHWNSCLYFALSRYLGFGRD------->A<WVYPD---PAQP------------------209
CNGB1LYSLHLNSCLYYWASAYQGLGST------->H<WVYD--------------------------826
CNGB3LFILHINACVYYWASNYEGIGTT------->R<WVYD--------------------------388
HCN1LLLCHWDGCLQFLVPLLQDFPPD------->C<WVS-----LNEM------------------336
HCN2LLLCHWDGCLQFLVPMLQDFPRN------->C<WVS-----INGM------------------405
HCN3LLLCHWDGCLQFLVPMLQDFPPD------->C<WVS-----INHM------------------289
HCN4LLLCHWDGCLQFLVPMLQDFPDD------->C<WVS-----INNM------------------456
cons                              > <                              

See full Alignment of Paralogues


Known Variants in KCNH2

ProteinCDSDisease ClassificationDiseasedbSNP linksEffect Prediction
p.G584Cc.1750G>T Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS Mutation site dependent variability of cardiac events in Japanese LQT2 form of congenital long-QT syndrome. Circ J. 2008 72(5):694-9. 18441445
p.G584Rc.1750G>C 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.G584Sc.1750G>A Inherited ArrhythmiaLQTSSIFT: tolerated
Polyphen: benign
ReportsInherited ArrhythmiaLQTS Sinus node function and ventricular repolarization during exercise stress test in long QT syndrome patients with KvLQT1 and HERG potassium channel defects. J Am Coll Cardiol. 1999 34(3):823-9. 10483966
Inherited ArrhythmiaLQTS Survey of the coding region of the HERG gene in long QT syndrome reveals six novel mutations and an amino acid polymorphism with possible phenotypic effects. Hum Mutat. 2000 15(6):580-1. 10862094
Inherited ArrhythmiaLQTS Spectrum of mutations in long-QT syndrome genes. KVLQT1, HERG, SCN5A, KCNE1, and KCNE2. Circulation. 2000 102(10):1178-85. 10973849
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 Not all hERG pore domain mutations have a severe phenotype: G584S has an inactivation gating defect with mild phenotype compared to G572S, which has a dominant negative trafficking defect and a severe phenotype. J Cardiovasc Electrophysiol. 2009 20(8):923-30. 19490267
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
Other Cardiac Phenotype Utility and limitations of exome sequencing as a genetic diagnostic tool for conditions associated with pediatric sudden cardiac arrest/sudden cardiac death. Hum Genomics. 2015 9:15. doi: 10.1186/s40246-015-0038-y. 26187847
p.G584Vc.1751G>T Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS Molecular genetic analysis of long QT syndrome in Norway indicating a high prevalence of heterozygous mutation carriers. Scand J Clin Lab Invest. 2008 68(5):362-8. 18752142