rs66612022

Variant summary

Our verdict is Pathogenic. Variant got 15 ACMG points: 15P and 0B. PM2PP2PP3_StrongPP5_Very_Strong

The NM_000089.4(COL1A2):​c.982G>A​(p.Gly328Ser) 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 (★★).

Frequency

Genomes: not found (cov: 32)

Consequence

COL1A2
NM_000089.4 missense

Scores

15
3
1

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:6

Conservation

PhyloP100: 9.57
Variant links:
Genes affected
COL1A2 (HGNC:2198): (collagen type I alpha 2 chain) This gene encodes the pro-alpha2 chain of type I collagen whose triple helix comprises two alpha1 chains and one alpha2 chain. Type I is a fibril-forming collagen found in most connective tissues and is abundant in bone, cornea, dermis and tendon. Mutations in this gene are associated with osteogenesis imperfecta types I-IV, Ehlers-Danlos syndrome type VIIB, recessive Ehlers-Danlos syndrome Classical type, idiopathic osteoporosis, and atypical Marfan syndrome. Symptoms associated with mutations in this gene, however, tend to be less severe than mutations in the gene for the alpha1 chain of type I collagen (COL1A1) reflecting the different role of alpha2 chains in matrix integrity. Three transcripts, resulting from the use of alternate polyadenylation signals, have been identified for this gene. [provided by R. Dalgleish, Feb 2008]

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ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 15 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
PP2
Missense variant in the COL1A2 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 437 curated pathogenic missense variants (we use a threshold of 10). The gene has 17 curated benign missense variants. Gene score misZ: 2.1491 (below the threshold of 3.09). Trascript score misZ: 3.5344 (above the threshold of 3.09). GenCC associations: The gene is linked to Ehlers-Danlos/osteogenesis imperfecta syndrome, Ehlers-Danlos syndrome, cardiac valvular type, ehlers-danlos syndrome, arthrochalasia type, 2, Ehlers-Danlos syndrome, arthrochalasia type, osteogenesis imperfecta type 3, high bone mass osteogenesis imperfecta, combined osteogenesis imperfecta and Ehlers-Danlos syndrome 2, osteogenesis imperfecta type 4, osteogenesis imperfecta type 2, osteogenesis imperfecta type 1.
PP3
MetaRNN computational evidence supports a deleterious effect, 0.995
PP5
Variant 7-94409768-G-A is Pathogenic according to our data. Variant chr7-94409768-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 456848.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr7-94409768-G-A is described in Lovd as [Pathogenic]. Variant chr7-94409768-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
COL1A2NM_000089.4 linkc.982G>A p.Gly328Ser missense_variant Exon 19 of 52 ENST00000297268.11 NP_000080.2 P08123A0A0S2Z3H5

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
COL1A2ENST00000297268.11 linkc.982G>A p.Gly328Ser missense_variant Exon 19 of 52 1 NM_000089.4 ENSP00000297268.6 P08123

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
Cov.:
37
GnomAD4 genome
Cov.:
32

ClinVar

Significance: Pathogenic
Submissions summary: Pathogenic:6
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

Osteogenesis imperfecta Pathogenic:1
Jun 16, 2023
Lake Erie College Of Osteopathic Medicine, Lecom Bradenton
Significance: Pathogenic
Review Status: no assertion criteria provided
Collection Method: clinical testing

Osteogenesis Imperfecta, indeterminate type -

Ehlers-Danlos syndrome, cardiac valvular type Pathogenic:1
Feb 14, 2022
DASA
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

Well-established in vitro or in vivo functional studies supportive of a damaging effect on the gene or gene product (PMID: 32659730) - PS3_supporting. The c.982G>A;p.(Gly328Ser) missense variant has been observed in affected individual(s) and ClinVar contains an entry for this variant (Clinvar ID: 456848; PMID: 22589248; 16705691; 9272740; 27519266; 26307460) - PS4. This variant is not present in population databases (rs66612022, gnomAD; ABraOM no frequency - http://abraom.ib.usp.br/) - PM2. Pathogenic missense variant in this residue have been reported (Clinvar ID: 618025; 372735) - PM5. The variant co-segregated with disease in multiple affected family members (PMID: 26307460) - PP1. Multiple lines of computational evidence support a deleterious effect on the gene or gene product - PP3. In summary, the currently available evidence indicates that the variant is pathogenic. -

Osteogenesis imperfecta with normal sclerae, dominant form Pathogenic:1
Sep 09, 2019
Centre for Mendelian Genomics, University Medical Centre Ljubljana
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

This variant was classified as: Pathogenic. The following ACMG criteria were applied in classifying this variant: PS1,PM1,PM2,PM5,PP3. -

not provided Pathogenic:1
Jan 18, 2022
GeneDx
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

Observed frequently in unrelated patients with osteogenesis imperfecta from different ethnic backgrounds in published literature (Lee et al., 2006; Marini et al., 2007; Bardai et al., 2016; Ho Duy et al., 2016) and not observed in controls; Occurs in the triple helical domain and replaces the glycine in the canonical Gly-X-Y repeat; missense substitution of a canonical glycine residue is expected to disrupt normal protein folding and function, and this is an established mechanism of disease (HGMD); Not observed in large population cohorts (gnomAD); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 22589248, 15024745, 27509835, 9594376, 31414283, 9272740, 32123938, 31853946, 32659730, 16705691, 26307460, 21667357, 24668929, 17875077, 27519266, 29907962, 7860070, 31447884, 17078022, 29453417, 32770541) -

Osteogenesis imperfecta type I;C0268335:Ehlers-Danlos syndrome, classic type, 1 Pathogenic:1
Jan 29, 2025
Labcorp Genetics (formerly Invitae), Labcorp
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 328 of the COL1A2 protein (p.Gly328Ser). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with autosomal dominant osteogenesis imperfecta (PMID: 7860070, 9272740, 16705691, 17078022, 22589248). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 456848). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is expected to disrupt COL1A2 protein function with a positive predictive value of 95%. Experimental studies have shown that this missense change affects COL1A2 function (PMID: 7860070, 9272740, 9594376). For these reasons, this variant has been classified as Pathogenic. -

Postmenopausal osteoporosis;C0268358:Osteogenesis imperfecta, perinatal lethal;C0268362:Osteogenesis imperfecta type III;C0268363:Osteogenesis imperfecta with normal sclerae, dominant form;C4303789:Ehlers-Danlos syndrome, cardiac valvular type;CN293783:Ehlers-Danlos syndrome, arthrochalasia type, 2 Pathogenic:1
Oct 31, 2018
Fulgent Genetics, Fulgent Genetics
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
0.89
BayesDel_addAF
Pathogenic
0.58
D
BayesDel_noAF
Pathogenic
0.60
CADD
Pathogenic
26
DANN
Uncertain
1.0
DEOGEN2
Uncertain
0.77
D;.
Eigen
Pathogenic
1.1
Eigen_PC
Pathogenic
1.0
FATHMM_MKL
Pathogenic
0.97
D
LIST_S2
Pathogenic
0.99
D;D
M_CAP
Pathogenic
0.89
D
MetaRNN
Pathogenic
0.99
D;D
MetaSVM
Pathogenic
1.0
D
MutationAssessor
Pathogenic
4.1
H;.
PrimateAI
Pathogenic
0.92
D
PROVEAN
Pathogenic
-5.0
D;.
REVEL
Pathogenic
0.99
Sift
Pathogenic
0.0
D;.
Sift4G
Uncertain
0.0020
D;D
Polyphen
1.0
D;.
Vest4
0.95
MutPred
0.98
Gain of glycosylation at G328 (P = 2e-04);.;
MVP
1.0
MPC
1.1
ClinPred
1.0
D
GERP RS
5.6
Varity_R
0.84
gMVP
1.0

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs66612022; hg19: chr7-94039080; COSMIC: COSV51956747; COSMIC: COSV51956747; API