rs121912939
Variant summary
Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM1PM2PM5PP3_StrongPP5_Moderate
The NM_001848.3(COL6A1):c.868G>T(p.Gly290Trp) 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. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G290E) has been classified as Pathogenic.
Frequency
Consequence
NM_001848.3 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 12 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
COL6A1 | NM_001848.3 | c.868G>T | p.Gly290Trp | missense_variant | 10/35 | ENST00000361866.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
COL6A1 | ENST00000361866.8 | c.868G>T | p.Gly290Trp | missense_variant | 10/35 | 1 | NM_001848.3 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 34
GnomAD4 exome Cov.: 44
GnomAD4 genome ? Cov.: 34
ClinVar
Submissions by phenotype
Bethlem myopathy 1A Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Jun 05, 2017 | For these reasons, this variant has been classified as Pathogenic. Different missense substitutions at this codon (p.Gly290Glu, p.Gly290Arg) have been determined to be pathogenic (PMID: 20976770, 16130093, 15689448, 24038877). This suggests that the glycine residue is critical for COL6A1 protein function and that other missense substitutions at this position may also be pathogenic. The glycine residue affected by this missense change (p.Gly290) lies within the triple helix region. Glycine residues within the triple helix region are crucial to maintain fibrillar collagens' structure and stability (PMID: 7695699, 19344236). In the case of COL6A1, missense substitutions that affect glycine residues within the triplex helix domain have been reported in many individuals affected with collagen VI myopathy (PMID: 24038877). This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a COL6A1-related disease. This sequence change replaces glycine with tryptophan at codon 290 of the COL6A1 protein (p.Gly290Trp). The glycine residue is highly conserved and there is a large physicochemical difference between glycine and tryptophan. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at