Paralogue Annotation for KCNH2 residue 522

Residue details

Gene: KCNH2
Reference Sequences: LRG: LRG_288, Ensembl variant: ENST00000262186 / ENSP00000262186
Amino Acid Position: 522
Reference Amino Acid: G - Glycine
Protein Domain: Transmembrane/Linker/Pore


Paralogue Variants mapped to KCNH2 residue 522

ParalogueVariantAssociated DiseaseMapping QualityConsensusPubmed
CNGB1R762CRetinitis pigmentosaMedium6 21987686, 24339724
CNGA3R274KCone dystrophyMedium6 24903488
CNGA3R274SAchromatopsiaMedium6

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----------------------------LI>G<LLKTARLLRLVRVARKLDRY-----SEYGA547
KCNH1DPGKIGFADQ---IPPPLEGRESQGISSLF>S<SLKVVRLLRLGRVARKLDHY-----IEYGA376
KCNH3---------V---Y-------------FGA>H<LLKTVRLLRLLRLLPRLDRY-----SQYSA357
KCNH4---------V---T-------------SLV>H<LLKTVRLLRLLRLLQKLERY-----SQCSA359
KCNH5-------------------------ISSLF>S<SLKVVRLLRLGRVARKLDHY-----LEYGA346
KCNH6---------T---T-------------TLI>G<LLKTARLLRLVRVARKLDRY-----SEYGA398
KCNH7---------T---T-------------TLI>G<LLKTARLLRLVRVARKLDRY-----SEYGA549
KCNH8---------V---V-------------SLV>H<LLKTVRLLRLLRLLQKLDRY-----SQHST353
CNGA1---------------------------PEI>R<LNRLLRFSRMFEFFQRTETR-----TNYPN296
CNGA2---------------------------PEV>R<FNRLLHFARMFEFFDRTETR-----TNYPN271
CNGA3---------------------------PEV>R<FNRLLKFSRLFEFFDRTETR-----TNYPN299
CNGA4---------------------------PTL>R<LNRFLRAPRLFEAFDRTETR-----TAYPN165
CNGB1---------------------------PLL>R<LPRCLKYMAFFEFNSRLESI-----LSKAY787
CNGB3---------------------------PMF>R<ANRMLKYTSFFEFNHHLESI-----MDKAY349
HCN1YKTARALR-IVRFT-------------KIL>S<LLRLLRLSRLIRYIHQWEEIFHMTYDLASA294
HCN2YKTARALR-IVRFT-------------KIL>S<LLRLLRLSRLIRYIHQWEEIFHMTYDLASA363
HCN3YKTARALR-IVRFT-------------KIL>S<LLRLLRLSRLIRYIHQWEEIFHMTYDLASA247
HCN4YKTARALR-IVRFT-------------KIL>S<LLRLLRLSRLIRYIHQWEEIFHMTYDLASA414
cons                              > <                              

See full Alignment of Paralogues


Known Variants in KCNH2

ProteinCDSDisease ClassificationDiseasedbSNP linksEffect Prediction
p.G522Rc.1564G>A Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: possibly damaging
ReportsInherited ArrhythmiaLQTS The genetic basis of long QT and short QT syndromes: a mutation update. Hum Mutat. 2009 30(11):1486-511. 19862833
p.G522Ec.1565G>A Putative BenignSIFT:
Polyphen: