rs373514837

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1PM2

The NM_001849.4(COL6A2):c.2043C>G(p.Ile681Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,822 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

COL6A2
NM_001849.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0510

Variant links:

Genes affected

COL6A2 (HGNC:2212): (collagen type VI alpha 2 chain) This gene encodes one of the three alpha chains of type VI collagen, a beaded filament collagen found in most connective tissues. The product of this gene contains several domains similar to von Willebrand Factor type A domains. These domains have been shown to bind extracellular matrix proteins, an interaction that explains the importance of this collagen in organizing matrix components. Mutations in this gene are associated with Bethlem myopathy and Ullrich scleroatonic muscular dystrophy. Three transcript variants have been identified for this gene. [provided by RefSeq, Jul 2008]

COL6A2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM1

In a domain VWFA 2 (size 190) in uniprot entity CO6A2_HUMAN there are 17 pathogenic changes around while only 5 benign (77%) in NM_001849.4

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL6A2	NM_001849.4 link	c.2043C>G	p.Ile681Met	missense_variant	Exon 26 of 28	ENST00000300527.9	NP_001840.3	P12110-1A0A384MDP3
COL6A2	NM_058174.3 link	c.2043C>G	p.Ile681Met	missense_variant	Exon 26 of 28		NP_478054.2	P12110-2
COL6A2	NM_058175.3 link	c.2043C>G	p.Ile681Met	missense_variant	Exon 26 of 28		NP_478055.2	P12110-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
COL6A2	ENST00000300527.9 link	c.2043C>G	p.Ile681Met	missense_variant	Exon 26 of 28	1	NM_001849.4	ENSP00000300527.4	P12110-1
COL6A2	ENST00000397763.6 link	c.2043C>G	p.Ile681Met	missense_variant	Exon 26 of 28	5		ENSP00000380870.1	P12110-2
COL6A2	ENST00000409416.6 link	c.2043C>G	p.Ile681Met	missense_variant	Exon 25 of 27	5		ENSP00000387115.1	P12110-3
COL6A2	ENST00000413758.1 link	c.714C>G	p.Ile238Met	missense_variant	Exon 11 of 11	3		ENSP00000395751.1	H7C0M5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250780

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135808

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000883

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1460822

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726724

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Bethlem myopathy 1A

Uncertain:1

Mar 21, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces isoleucine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 681 of the COL6A2 protein (p.Ile681Met). This variant is present in population databases (rs373514837, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with COL6A2-related conditions. 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 COL6A2 protein function with a positive predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.29

BayesDel_addAF

Uncertain

0.055

BayesDel_noAF

Benign

-0.16

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.41

T;.;.;.;T

Eigen

Benign

-0.099

Eigen_PC

Benign

-0.23

FATHMM_MKL

Benign

0.54

LIST_S2

Uncertain

0.92

D;D;.;D;D

M_CAP

Uncertain

0.21

MetaRNN

Uncertain

0.68

D;D;D;D;D

MetaSVM

Uncertain

-0.12

MutationAssessor

Pathogenic

2.9

M;M;M;M;.

PrimateAI

Benign

0.42

PROVEAN

Uncertain

-2.5

D;N;N;N;D

REVEL

Uncertain

0.54

Sift

Uncertain

0.0010

D;D;D;D;D

Sift4G

Uncertain

0.0080

D;D;D;D;D

Polyphen

0.96

D;P;P;P;.

Vest4

0.57

MutPred

0.51

Gain of disorder (P = 0.0561);Gain of disorder (P = 0.0561);Gain of disorder (P = 0.0561);Gain of disorder (P = 0.0561);.;

MVP

0.65

MPC

0.51

ClinPred

0.96

GERP RS

2.4

Varity_R

0.85

gMVP

0.74

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over