rs1330549395
Variant summary
Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1PM2PP3_Strong
The NM_000083.3(CLCN1):c.922G>C(p.Ala308Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,878 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. A308V) has been classified as Uncertain significance.
Frequency
Consequence
NM_000083.3 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/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CLCN1 | NM_000083.3 | c.922G>C | p.Ala308Pro | missense_variant | 8/23 | ENST00000343257.7 | |
CLCN1 | NR_046453.2 | n.1027G>C | non_coding_transcript_exon_variant | 8/22 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CLCN1 | ENST00000343257.7 | c.922G>C | p.Ala308Pro | missense_variant | 8/23 | 1 | NM_000083.3 | P4 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 exomes AF: 0.00000795 AC: 2AN: 251422Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135880
GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461878Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 727242
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
Congenital myotonia, autosomal recessive form;C2936781:Congenital myotonia, autosomal dominant form Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jun 04, 2022 | 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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt CLCN1 protein function. ClinVar contains an entry for this variant (Variation ID: 531746). This variant has not been reported in the literature in individuals affected with CLCN1-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.006%). This sequence change replaces alanine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 308 of the CLCN1 protein (p.Ala308Pro). - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at