2-237340458-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_004369.4(COL6A3):c.8458G>A(p.Val2820Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000472 in 1,612,446 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0025 ( 2 hom., cov: 33)

Exomes 𝑓: 0.00026 ( 2 hom. )

Consequence

COL6A3
NM_004369.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 1.11

Variant links:

Genes affected

COL6A3 (HGNC:2213): (collagen type VI alpha 3 chain) This gene encodes the alpha-3 chain, one of the three alpha chains of type VI collagen, a beaded filament collagen found in most connective tissues. The alpha-3 chain of type VI collagen is much larger than the alpha-1 and -2 chains. This difference in size is largely due to an increase in the number of subdomains, similar to von Willebrand Factor type A domains, that are found in the amino terminal globular domain of all the alpha chains. 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 the type VI collagen genes are associated with Bethlem myopathy, a rare autosomal dominant proximal myopathy with early childhood onset. Mutations in this gene are also a cause of Ullrich congenital muscular dystrophy, also referred to as Ullrich scleroatonic muscular dystrophy, an autosomal recessive congenital myopathy that is more severe than Bethlem myopathy. Multiple transcript variants have been identified, but the full-length nature of only some of these variants has been described. [provided by RefSeq, Jun 2009]

COL6A3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0075490475).

BP6

Variant 2-237340458-C-T is Benign according to our data. Variant chr2-237340458-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 283682.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00251 (382/152314) while in subpopulation AFR AF= 0.0084 (349/41572). AF 95% confidence interval is 0.00767. There are 2 homozygotes in gnomad4. There are 181 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 2 SD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL6A3	NM_004369.4 link	c.8458G>A	p.Val2820Ile	missense_variant	Exon 38 of 44	ENST00000295550.9	NP_004360.2	P12111-1D9ZGF2Q8N4Z1Q63HQ4
COL6A3	NM_057167.4 link	c.7840G>A	p.Val2614Ile	missense_variant	Exon 37 of 43		NP_476508.2	P12111-2Q8N4Z1Q63HQ4
COL6A3	NM_057166.5 link	c.6637G>A	p.Val2213Ile	missense_variant	Exon 35 of 41		NP_476507.3	P12111-4B7ZW00

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL6A3	ENST00000295550.9 link	c.8458G>A	p.Val2820Ile	missense_variant	Exon 38 of 44	1	NM_004369.4	ENSP00000295550.4		P12111-1

Frequencies

GnomAD3 genomes

AF:

0.00249

AC:

379

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00835

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00105

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00478

GnomAD3 exomes

AF:

0.000689

AC:

172

AN:

249604

Hom.:

AF XY:

0.000577

AC XY:

AN XY:

135156

show subpopulations

Gnomad AFR exome

AF:

0.00914

Gnomad AMR exome

AF:

0.000492

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.000131

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000260

AC:

379

AN:

1460132

Hom.:

Cov.:

AF XY:

0.000248

AC XY:

180

AN XY:

726498

show subpopulations

Gnomad4 AFR exome

AF:

0.00747

Gnomad4 AMR exome

AF:

0.000581

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000378

Gnomad4 OTH exome

AF:

0.000762

GnomAD4 genome

AF:

0.00251

AC:

382

AN:

152314

Hom.:

Cov.:

AF XY:

0.00243

AC XY:

181

AN XY:

74472

show subpopulations

Gnomad4 AFR

AF:

0.00840

Gnomad4 AMR

AF:

0.00105

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.000415

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00473

Alfa

AF:

0.000501

Hom.:

Bravo

AF:

0.00289

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00749

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000865

AC:

105

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Jul 27, 2017

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. -

Oct 22, 2015

Eurofins Ntd Llc (ga)

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Bethlem myopathy 1A

Benign:1

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:1

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.082

BayesDel_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.38

CADD

Benign

6.0

DANN

Benign

0.91

DEOGEN2

Benign

0.11

.;T;.;T;.

Eigen

Benign

-0.63

Eigen_PC

Benign

-0.60

FATHMM_MKL

Benign

0.29

LIST_S2

Benign

0.73

T;T;T;T;.

MetaRNN

Benign

0.0075

T;T;T;T;T

MetaSVM

Benign

-0.71

MutationAssessor

Benign

1.6

.;L;.;.;.

PrimateAI

Benign

0.39

PROVEAN

Benign

0.22

N;N;N;N;N

REVEL

Benign

0.095

Sift

Benign

0.54

T;T;T;D;T

Sift4G

Benign

0.72

T;T;T;T;T

Polyphen

0.0010

B;P;.;.;B

Vest4

0.11

MVP

0.73

MPC

0.12

ClinPred

0.0025

GERP RS

1.5

Varity_R

0.022

gMVP

0.25

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.

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