rs72645356
Variant summary
Our verdict is Pathogenic. Variant got 13 ACMG points: 13P and 0B. PM1PM2PM5PP2PP3_StrongPP5_Moderate
The NM_000088.4(COL1A1):c.977G>A(p.Gly326Asp) 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. 11/19 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. G326R) has been classified as Likely pathogenic.
Frequency
Consequence
NM_000088.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 13 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
COL1A1 | NM_000088.4 | c.977G>A | p.Gly326Asp | missense_variant | 15/51 | ENST00000225964.10 | |
COL1A1 | XM_005257058.5 | c.977G>A | p.Gly326Asp | missense_variant | 15/49 | ||
COL1A1 | XM_005257059.5 | c.957+134G>A | intron_variant | ||||
COL1A1 | XM_011524341.2 | c.957+134G>A | intron_variant |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
COL1A1 | ENST00000225964.10 | c.977G>A | p.Gly326Asp | missense_variant | 15/51 | 1 | NM_000088.4 | P1 | |
COL1A1 | ENST00000485870.1 | n.302G>A | non_coding_transcript_exon_variant | 2/2 | 3 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD4 exome Cov.: 37
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
Osteogenesis imperfecta type I Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Sep 17, 2023 | This sequence change replaces glycine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 326 of the COL1A1 protein (p.Gly326Asp). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with osteogenesis imperfecta (PMID: 17078022, 27509835). ClinVar contains an entry for this variant (Variation ID: 425642). 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 COL1A1 protein function. For these reasons, this variant has been classified as Pathogenic. This variant disrupts the triple helix domain of COL1A1. Glycine residues within the Gly-Xaa-Yaa repeats of the triple helix domain are required for the structure and stability of fibrillar collagens (PMID: 7695699, 8218237, 19344236). In COL1A1, variants affecting these glycine residues are significantly enriched in individuals with disease (PMID: 9016532, 17078022) compared to the general population (ExAC). - |
Pathogenic, no assertion criteria provided | clinical testing | Department of Medical Sciences, Uppsala University | - | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at