Paralogue Annotation for KCNQ1 residue 258

Residue details

Gene: KCNQ1
Reference Sequences: LRG: LRG_287, Ensembl variant: ENST00000155840 / ENSP00000155840
Amino Acid Position: 258
Reference Amino Acid: H - Histidine
Protein Domain: Transmembrane/Linker/Pore


Paralogue Variants mapped to KCNQ1 residue 258

ParalogueVariantAssociated DiseaseMapping QualityConsensusPubmed
KCNQ2H228QEpilepsy, benign neonatalHigh9 14534157
KCNQ4H234LHearing loss, non-syndromicHigh9 27081546

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 KCNQ1.



KCNQ1RGIRFLQILRMLHVDRQGGTWRLLGSVVFI>H<RQELITTLYIGFLGLIFSSYFVYLAEKDAV288
KCNQ2RSLRFLQILRMIRMDRRGGTWKLLGSVVYA>H<SKELVTAWYIGFLCLILASFLVYLAEKGE-257
KCNQ3RSLRFLQILRMLRMDRRGGTWKLLGSAICA>H<SKELITAWYIGFLTLILSSFLVYLVEKDVP287
KCNQ4RSMRFLQILRMVRMDRRGGTWKLLGSVVYA>H<SKELITAWYIGFLVLIFASFLVYLAEKDA-263
KCNQ5RSLRFLQILRMVRMDRRGGTWKLLGSVVYA>H<SKELITAWYIGFLVLIFSSFLVYLVEKDA-291
KCNA1RVIRLVRVFRIFKLSRHSKGLQILGQTLKA>S<MRELGLLIFFLFIGVILFSSAVYFAEAEE-351
KCNA10RIIRLVRVFRIFKLSRHSKGLQILGQTLKA>S<MRELGLLIFFLFIGVILFSSAVYFAEVDE-400
KCNA2RVIRLVRVFRIFKLSRHSKGLQILGQTLKA>S<MRELGLLIFFLFIGVILFSSAVYFAEADE-353
KCNA3RVIRLVRVFRIFKLSRHSKGLQILGQTLKA>S<MRELGLLIFFLFIGVILFSSAVYFAEADD-423
KCNA4RIIRLVRVFRIFKLSRHSKGLQILGHTLRA>S<MRELGLLIFFLFIGVILFSSAVYFAEADE-503
KCNA5RVIRLVRVFRIFKLSRHSKGLQILGKTLQA>S<MRELGLLIFFLFIGVILFSSAVYFAEADN-459
KCNA6RVIRLVRVFRIFKLSRHSKGLQILGKTLQA>S<MRELGLLIFFLFIGVILFSSAVYFAEADD-401
KCNA7RVIRLVRVFRIFKLSRHSKGLQILGQTLRA>S<MRELGLLIFFLFIGVVLFSSAVYFAEVDR-337
KCNB1QIFRIMRILRILKLARHSTGLQSLGFTLRR>S<YNELGLLILFLAMGIMIFSSLVFFAEKDE-356
KCNB2QIFRIMRILRILKLARHSTGLQSLGFTLRR>S<YNELGLLILFLAMGIMIFSSLVFFAEKDE-360
KCNC1RVVRFVRILRIFKLTRHFVGLRVLGHTLRA>S<TNEFLLLIIFLALGVLIFATMIYYAERIGA371
KCNC2RVVRFVRILRIFKLTRHFVGLRVLGHTLRA>S<TNEFLLLIIFLALGVLIFATMIYYAERVGA408
KCNC3RVVRFVRILRIFKLTRHFVGLRVLGHTLRA>S<TNEFLLLIIFLALGVLIFATMIYYAERIGA474
KCNC4RVVRFVRILRIFKLTRHFVGLRVLGHTLRA>S<TNEFLLLIIFLALGVLIFATMIYYAERIGA407
KCND1VTLRVFRVFRIFKFSRHSQGLRILGYTLKS>C<ASELGFLLFSLTMAIIIFATVMFYAEKGT-351
KCND2VTLRVFRVFRIFKFSRHSQGLRILGYTLKS>C<ASELGFLLFSLTMAIIIFATVMFYAEKGS-349
KCND3VTLRVFRVFRIFKFSRHSQGLRILGYTLKS>C<ASELGFLLFSLTMAIIIFATVMFYAEKGS-346
KCNF1QALRIMRIARIFKLARHSSGLQTLTYALKR>S<FKELGLLLMYLAVGIFVFSALGYTMEQSH-349
KCNG1RVLRALRILYVMRLARHSLGLQTLGLTARR>C<TREFGLLLLFLCVAIALFAPLLYVIENEM-402
KCNG2RLLRALRVLYVMRLARHSLGLRSLGLTMRR>C<AREFGLLLLFLCVAMALFAPLVHLAEREL-347
KCNG3RVLRMMRIFWVIKLARHFIGLQTLGLTLKR>C<YREMVMLLVFICVAMAIFSALSQLLEHGL-348
KCNG4RVLRALRILYVMRLARHSLGLQTLGLTVRR>C<TREFGLLLLFLAVAITLFSPLVYVAEKES-396
KCNS1QVFRLMRIFRVLKLARHSTGLRSLGATLKH>S<YREVGILLLYLAVGVSVFSGVAYTAEKEE-401
KCNS2QVLRLMRIFRILKLARHSTGLRSLGATLKY>S<YKEVGLLLLYLSVGISIFSVVAYTIEKEE-354
KCNS3QILRLMRIFRILKLARHSVGLRSLGATLRH>S<YHEVGLLLLFLSVGISIFSVLIYSVEKDD-349
KCNV1QVLRLLRALRMLKLGRHSTGLRSLGMTITQ>C<YEEVGLLLLFLSVGISIFSTVEYFAEQSI-371
KCNV2RVMRLMRIFRILKLARHSTGLRAFGFTLRQ>C<YQQVGCLLLFIAMGIFTFSAAVYSVEHDV-436
cons                              > <                              

See full Alignment of Paralogues


Known Variants in KCNQ1

ProteinCDSDisease ClassificationDiseasedbSNP linksEffect Prediction
p.H258Nc.772C>A Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS Genetic testing in the long QT syndrome: development and validation of an efficient approach to genotyping in clinical practice. JAMA. 2005 294(23):2975-80. 16414944
p.H258Pc.773A>C Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS Long QT syndrome with compound mutations is associated with a more severe phenotype: a Japanese multicenter study. Heart Rhythm. 2010 7(10):1411-8. 20541041
Inherited ArrhythmiaLQTS Identification of a novel KCNQ1 mutation in a large Saudi family with long QT syndrome: clinical consequences and preventive implications. Clin Genet. 2013 83(4):370-4. doi: 10.1111/j.1399-0004.2012.01914.x 22708720
p.H258Rc.773A>G Inherited ArrhythmiaLQTSSIFT: deleterious
Polyphen: probably damaging
ReportsInherited ArrhythmiaLQTS Genetic testing in the long QT syndrome: development and validation of an efficient approach to genotyping in clinical practice. JAMA. 2005 294(23):2975-80. 16414944
Inherited ArrhythmiaLQTS The rate-dependent biophysical properties of the LQT1 H258R mutant are counteracted by a dominant negative effect on channel trafficking. J Mol Cell Cardiol. 2010 48(6):1096-104. 19913547
p.H258Yc.772C>T Putative BenignSIFT:
Polyphen: