7-150951471-G-C
Variant summary
Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1PM2PM5PP3_Moderate
The NM_000238.4(KCNH2):c.1922C>G(p.Ser641Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S641F) has been classified as Pathogenic.
Frequency
Consequence
NM_000238.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_pathogenic. Variant got 8 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
KCNH2 | NM_000238.4 | c.1922C>G | p.Ser641Cys | missense_variant | Exon 7 of 15 | ENST00000262186.10 | NP_000229.1 |
Ensembl
Frequencies
GnomAD3 genomes Cov.: 34
GnomAD4 exome Cov.: 34
GnomAD4 genome Cov.: 34
ClinVar
Submissions by phenotype
Long QT syndrome Uncertain:1
This variant disrupts the p.Ser641 amino acid residue in KCNH2. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 18441445, 22949429, 25417810; Invitae). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Experimental studies have shown that this missense change affects KCNH2 function (PMID: 15371638, 20876384). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. This variant has not been reported in the literature in individuals affected with KCNH2-related conditions. This variant is not present in population databases (gnomAD no frequency). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. This sequence change replaces serine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 641 of the KCNH2 protein (p.Ser641Cys). -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
No publications associated with this variant yet.