chr21-46003792-G-A
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Variant summary
Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2
The NM_001848.3(COL6A1):c.2866G>A(p.Glu956Lys) variant causes a missense change. The variant allele was found at a frequency of 0.00156 in 1,611,122 control chromosomes in the GnomAD database, including 41 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).
Frequency
Genomes: 𝑓 0.0014 ( 2 hom., cov: 34)
Exomes 𝑓: 0.0016 ( 39 hom. )
Consequence
COL6A1
NM_001848.3 missense
NM_001848.3 missense
Scores
5
13
Clinical Significance
Conservation
PhyloP100: 5.30
Genes affected
COL6A1 (HGNC:2211): (collagen type VI alpha 1 chain) The collagens are a superfamily of proteins that play a role in maintaining the integrity of various tissues. Collagens are extracellular matrix proteins and have a triple-helical domain as their common structural element. Collagen VI is a major structural component of microfibrils. The basic structural unit of collagen VI is a heterotrimer of the alpha1(VI), alpha2(VI), and alpha3(VI) chains. The alpha2(VI) and alpha3(VI) chains are encoded by the COL6A2 and COL6A3 genes, respectively. The protein encoded by this gene is the alpha 1 subunit of type VI collagen (alpha1(VI) chain). Mutations in the genes that code for the collagen VI subunits result in the autosomal dominant disorder, Bethlem myopathy. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -20 ACMG points.
BP4
Computational evidence support a benign effect (MetaRNN=0.008347839).
BP6
Variant 21-46003792-G-A is Benign according to our data. Variant chr21-46003792-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 196953.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
BS1
Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.00143 (218/152376) while in subpopulation SAS AF= 0.00683 (33/4834). AF 95% confidence interval is 0.005. There are 2 homozygotes in gnomad4. There are 111 alleles in male gnomad4 subpopulation. Median coverage is 34. This position pass quality control queck.
BS2
High Homozygotes in GnomAd4 at 2 AD,AR gene
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
COL6A1 | NM_001848.3 | c.2866G>A | p.Glu956Lys | missense_variant | 35/35 | ENST00000361866.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
COL6A1 | ENST00000361866.8 | c.2866G>A | p.Glu956Lys | missense_variant | 35/35 | 1 | NM_001848.3 | P1 |
Frequencies
GnomAD3 genomes AF: 0.00143 AC: 218AN: 152258Hom.: 2 Cov.: 34
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GnomAD3 exomes AF: 0.00291 AC: 720AN: 247078Hom.: 12 AF XY: 0.00323 AC XY: 434AN XY: 134502
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GnomAD4 exome AF: 0.00158 AC: 2300AN: 1458746Hom.: 39 Cov.: 34 AF XY: 0.00184 AC XY: 1337AN XY: 725318
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GnomAD4 genome AF: 0.00143 AC: 218AN: 152376Hom.: 2 Cov.: 34 AF XY: 0.00149 AC XY: 111AN XY: 74522
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ClinVar
Significance: Benign/Likely benign
Submissions summary: Benign:6
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not specified Benign:3
Likely benign, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | - | - - |
Benign, criteria provided, single submitter | clinical testing | GeneDx | Nov 17, 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, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Aug 19, 2015 | - - |
Bethlem myopathy 1A Benign:1
Benign, criteria provided, single submitter | clinical testing | Invitae | Jan 26, 2024 | - - |
Collagen 6-related myopathy 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. - |
not provided Benign:1
Likely benign, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Jun 01, 2024 | COL6A1: BS2 - |
Computational scores
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Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Benign
DANN
Uncertain
DEOGEN2
Benign
T;T
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Uncertain
D
LIST_S2
Benign
T;T
MetaRNN
Benign
T;T
MetaSVM
Benign
T
MutationAssessor
Benign
L;.
MutationTaster
Benign
D
PrimateAI
Uncertain
T
PROVEAN
Uncertain
D;.
REVEL
Uncertain
Sift
Benign
T;.
Sift4G
Benign
T;T
Polyphen
B;.
Vest4
MVP
MPC
ClinPred
T
GERP RS
Varity_R
gMVP
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