rs17122498
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Variant summary
Our verdict is Benign. Variant got -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BA1
The NM_001844.5(COL2A1):c.4068C>T(p.Gly1356Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.012 in 1,614,106 control chromosomes in the GnomAD database, including 1,065 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).
Frequency
Genomes: 𝑓 0.043 ( 422 hom., cov: 32)
Exomes 𝑓: 0.0088 ( 643 hom. )
Consequence
COL2A1
NM_001844.5 synonymous
NM_001844.5 synonymous
Scores
2
Clinical Significance
Conservation
PhyloP100: 0.278
Genes affected
COL2A1 (HGNC:2200): (collagen type II alpha 1 chain) This gene encodes the alpha-1 chain of type II collagen, a fibrillar collagen found in cartilage and the vitreous humor of the eye. Mutations in this gene are associated with achondrogenesis, chondrodysplasia, early onset familial osteoarthritis, SED congenita, Langer-Saldino achondrogenesis, Kniest dysplasia, Stickler syndrome type I, and spondyloepimetaphyseal dysplasia Strudwick type. In addition, defects in processing chondrocalcin, a calcium binding protein that is the C-propeptide of this collagen molecule, are also associated with chondrodysplasia. There are two transcripts identified for this gene. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -19 ACMG points.
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.38).
BP6
Variant 12-47974681-G-A is Benign according to our data. Variant chr12-47974681-G-A is described in ClinVar as [Benign]. Clinvar id is 258235.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-47974681-G-A is described in Lovd as [Benign].
BP7
Synonymous conserved (PhyloP=0.278 with no splicing effect.
BA1
GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.134 is higher than 0.05.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| COL2A1 | NM_001844.5 | c.4068C>T | p.Gly1356Gly | synonymous_variant | 52/54 | ENST00000380518.8 | NP_001835.3 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| COL2A1 | ENST00000380518.8 | c.4068C>T | p.Gly1356Gly | synonymous_variant | 52/54 | 1 | NM_001844.5 | ENSP00000369889.3 | ||
| COL2A1 | ENST00000337299.7 | c.3861C>T | p.Gly1287Gly | synonymous_variant | 51/53 | 1 | ENSP00000338213.6 | |||
| COL2A1 | ENST00000493991.5 | n.3154C>T | non_coding_transcript_exon_variant | 35/37 | 2 |
Frequencies
GnomAD3 genomes 0.0428 AC: 6516AN: 152146Hom.: 421 Cov.: 32
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GnomAD3 exomes AF: 0.0202 AC: 5087AN: 251476Hom.: 270 AF XY: 0.0198 AC XY: 2686AN XY: 135916
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GnomAD4 exome AF: 0.00879 AC: 12854AN: 1461842Hom.: 643 Cov.: 32 AF XY: 0.00998 AC XY: 7257AN XY: 727222
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GnomAD4 genome 0.0430 AC: 6542AN: 152264Hom.: 422 Cov.: 32 AF XY: 0.0428 AC XY: 3185AN XY: 74448
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ClinVar
Significance: Benign
Submissions summary: Benign:9
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not specified Benign:4
| Benign, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | - | - - |
| Benign, criteria provided, single submitter | clinical testing | GeneDx | May 27, 2016 | This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. - |
| Benign, no assertion criteria provided | clinical testing | Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+ | - | - - |
| Benign, no assertion criteria provided | clinical testing | Genome Diagnostics Laboratory, Amsterdam University Medical Center | - | - - |
not provided Benign:3
| Benign, criteria provided, single submitter | clinical testing | ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories | May 02, 2023 | - - |
| Benign, criteria provided, single submitter | not provided | Breakthrough Genomics, Breakthrough Genomics | - | - - |
| Benign, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jan 31, 2024 | - - |
Stickler syndrome type 1 Benign:1
| Benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 13, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. - |
Type II Collagenopathies Benign:1
| Benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 13, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. - |
Computational scores
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BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at