Paralogue Annotation for KCNH2 residue 99

Residue details

Gene: KCNH2
Reference Sequences: LRG: LRG_288, Ensembl variant: ENST00000262186 / ENSP00000262186
Amino Acid Position: 99
Reference Amino Acid: Y - Tyrosine
Protein Domain: N-terminus


Paralogue Variants mapped to KCNH2 residue 99

ParalogueVariantAssociated DiseaseMapping QualityConsensusPubmed
HCN2S126LFebrile seizuresMedium4 24324597

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.



KCNH2----------GAEE-R-------KVE-IAF>Y<RK-----------DGS--------------104
KCNH1----------NYEM-N-------SFE-ILM>Y<KK-----------NRT--------------105
KCNH3----------EHKE-F-------KAE-LIL>Y<RK-----------SGL--------------105
KCNH4----------GHQE-H-------RAE-ICF>Y<RK-----------DGS--------------105
KCNH5----------NYES-N-------CFE-VLL>Y<KK-----------NRT--------------103
KCNH6----------GAEE-C-------KVD-ILY>Y<RK-----------DAS--------------104
KCNH7----------GSEE-R-------KVE-VTY>Y<HK-----------NGS--------------104
KCNH8----------EKTE-F-------KGE-IMF>Y<KK-----------NGS--------------105
CNGA1----------EDDD-SASTSEESENEN-PH>A<-R-----------GSF--------------66
CNGA2----------AADDDTSSE---------LQ>R<-L-----------ADV--------------56
CNGA3----------SSEE-TSSVLQPGIAME-TR>G<-L-----------ADS--------------60
CNGA4------------------------------>-<------------------------------
CNGB1----------AQDT-R-------PGLRLLL>W<LEQNLERVLPQPPKSSEVWRDEPAVATGAA191
CNGB3------------------------------>-<------------------------------
HCN1LGTPPGGGGAGAKE-H-------GNS-VCF>K<VD----------------------------62
HCN2GEPQCSPAGPEGPA-R-------GPK-VSF>S<CR----------------------------128
HCN3----------------------------AP>P<PA----------------------------30
HCN4-----------------------------A>S<CE----------------------------180
cons                              > <                              

See full Alignment of Paralogues


Known Variants in KCNH2

ProteinCDSDisease ClassificationDiseasedbSNP linksEffect Prediction
p.Y99Sc.296A>C Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: possibly damaging
ReportsInherited ArrhythmiaLQTS DHPLC analysis of potassium ion channel genes in congenital long QT syndrome. Hum Mutat. 2002 20(5):382-91. 12402336
Inherited ArrhythmiaLQTS Genetic testing for long-QT syndrome: distinguishing pathogenic mutations from benign variants. Circulation. 2009 120(18):1752-60. 19841300
Inherited ArrhythmiaLQTS Mortality of inherited arrhythmia syndromes: insight into their natural history. Circ Cardiovasc Genet. 2012 5(2):183-9. 22373669
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 Large-scale mutational analysis of Kv11.1 reveals molecular insights into type 2 long QT syndrome. Nat Commun. 2014 5:5535. doi: 10.1038/ncomms6535. 25417810
p.Tyr99Cysc.296A>G UnknownSIFT:
Polyphen: