Paralogue Annotation for KCNH2 residue 687

Residue details

Gene: KCNH2
Reference Sequences: LRG: LRG_288, Ensembl variant: ENST00000262186 / ENSP00000262186
Amino Acid Position: 687
Reference Amino Acid: H - Histidine
Protein Domain: C-terminus


Paralogue Variants mapped to KCNH2 residue 687

ParalogueVariantAssociated DiseaseMapping QualityConsensusPubmed
CNGA3R427CColour-blindness, totalMedium9 11536077, 23972307
CNGB3Y469DMacular degeneration, juvenileMedium9 15712225, 26106334
CNGA1R424QRetinitis pigmentosaMedium9 18310263, 25268133, 25356976

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.



KCNH2GNVSAIIQRLYSGTARYHTQMLRVREFIRF>H<QIPNPLRQRLEEYFQHAWSYTNGIDMNAVL717
KCNH1GNVTTIFQQMYANTNRYHEMLNSVRDFLKL>Y<QVPKGLSERVMDYIVSTWSMSRGIDTEKVL556
KCNH3GNVTAIIQRMYARRFLYHSRTRDLRDYIRI>H<RIPKPLKQRMLEYFQATWAVNNGIDTTELL558
KCNH4GNVTAIIQRMYSRRSLYHSRMKDLKDFIRV>H<RLPRPLKQRMLEYFQTTWAVNSGIDANELL532
KCNH5GNVTTIFQQMYANTNRYHEMLNNVRDFLKL>Y<QVPKGLSERVMDYIVSTWSMSKGIDTEKVL525
KCNH6GNVSAIIQRLYSGTARYHTQMLRVKEFIRF>H<QIPNPLRQRLEEYFQHAWSYTNGIDMNAVL569
KCNH7GNVSAIIQRLYSGTARYHMQMLRVKEFIRF>H<QIPNPLRQRLEEYFQHAWTYTNGIDMNMVL720
KCNH8GNVTAIIQRMYSRWSLYHTRTKDLKDFIRV>H<HLPQQLKQRMLEYFQTTWSVNNGIDSNELL527
CNGA1GNIGSMISNMNAARAEFQARIDAIKQYMHF>R<NVSKDMEKRVIKWFDYLWTNKKTVDEKEVL454
CNGA2GNVGSMISNMNATRAEFQAKIDAVKHYMQF>R<KVSKGMEAKVIRWFDYLWTNKKTVDEREIL429
CNGA3GNVGSMISNMNASRAEFQAKIDSIKQYMQF>R<KVTKDLETRVIRWFDYLWANKKTVDEKEVL457
CNGA4GSMSSVIYNMNTADAAFYPDHALVKKYMKL>Q<HVNRKLERRVIDWYQHLQINKKMTNEVAIL323
CNGB1GQMRDVVGAATAGQTYYRSCMDSTVKYMNF>Y<KIPKSVQNRVKTWYEYTWHSQGMLDESELM937
CNGB3GQMRDVIGAATANQNYFRACMDDTIAYMNN>Y<SIPKLVQKRVRTWYEYTWDSQRMLDESDLL499
HCN1GHATALIQSLDSSRRQYQEKYKQVEQYMSF>H<KLPADMRQKIHDYYEHRYQG-KIFDEENIL450
HCN2GHATALIQSLDSSRRQYQEKYKQVEQYMSF>H<KLPADFRQKIHDYYEHRYQG-KMFDEDSIL519
HCN3GHATALIQSLDSSRRQYQEKYKQVEQYMSF>H<KLPADTRQRIHEYYEHRYQG-KMFDEESIL403
HCN4GHATALIQSLDSSRRQYQEKYKQVEQYMSF>H<KLPPDTRQRIHDYYEHRYQG-KMFDEESIL570
cons                              > <                              

See full Alignment of Paralogues


Known Variants in KCNH2

ProteinCDSDisease ClassificationDiseasedbSNP linksEffect Prediction
p.H687Yc.2059C>T Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: benign
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
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