rs1554425151
Positions:
Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2
The ENST00000262186.10(KCNH2):c.2398+3A>G variant causes a splice donor region, intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Genomes: not found (cov: 28)
Consequence
KCNH2
ENST00000262186.10 splice_donor_region, intron
ENST00000262186.10 splice_donor_region, intron
Scores
4
10
Clinical Significance
Conservation
PhyloP100: 2.69
Genes affected
KCNH2 (HGNC:6251): (potassium voltage-gated channel subfamily H member 2) This gene encodes a component of a voltage-activated potassium channel found in cardiac muscle, nerve cells, and microglia. Four copies of this protein interact with one copy of the KCNE2 protein to form a functional potassium channel. Mutations in this gene can cause long QT syndrome type 2 (LQT2). Transcript variants encoding distinct isoforms have been identified. [provided by RefSeq, May 2022]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 2 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
KCNH2 | NM_000238.4 | c.2398+3A>G | splice_donor_region_variant, intron_variant | ENST00000262186.10 | NP_000229.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
KCNH2 | ENST00000262186.10 | c.2398+3A>G | splice_donor_region_variant, intron_variant | 1 | NM_000238.4 | ENSP00000262186 | P1 |
Frequencies
GnomAD3 genomes Cov.: 28
GnomAD3 genomes
Cov.:
28
GnomAD4 exome Cov.: 23
GnomAD4 exome
Cov.:
23
GnomAD4 genome Cov.: 28
GnomAD4 genome
Cov.:
28
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Long QT syndrome Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jun 04, 2021 | 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. Nucleotide substitutions within the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site, but this prediction has not been confirmed by published transcriptional studies. This variant has been observed in individual(s) with long QT syndrome (LQTS) (PMID: 16414944). ClinVar contains an entry for this variant (Variation ID: 523701). This variant is not present in population databases (ExAC no frequency). This sequence change falls in intron 9 of the KCNH2 gene. It does not directly change the encoded amino acid sequence of the KCNH2 protein. It affects a nucleotide within the consensus splice site of the intron. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute | Jun 12, 2017 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Benign
DANN
Uncertain
DEOGEN2
Benign
T
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Benign
D
LIST_S2
Benign
T
M_CAP
Benign
D
MetaRNN
Benign
T
MetaSVM
Uncertain
D
MutationTaster
Benign
D;D;D;N
REVEL
Uncertain
Sift4G
Uncertain
T
Vest4
MVP
ClinPred
D
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_DL_spliceai
Position offset: 3
Find out detailed SpliceAI scores and Pangolin per-transcript scores at