rs202092407

chr2-237347829-G-Achr2-237347829-G-Cchr2-237347829-G-T

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_004369.4(COL6A3):c.7007C>T(p.Pro2336Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000485 in 1,611,398 control chromosomes in the GnomAD database, including 10 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P2336H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00089 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00044 ( 10 hom. )

Consequence

COL6A3
NM_004369.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:5

Conservation

PhyloP100: 5.95

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 -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.012838364).

BP6

Variant 2-237347829-G-A is Benign according to our data. Variant chr2-237347829-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 166938.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Benign=2, Uncertain_significance=1}.

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000893 (136/152268) while in subpopulation AMR AF= 0.00876 (134/15300). AF 95% confidence interval is 0.00755. There are 0 homozygotes in gnomad4. There are 76 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome at 6 SD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
COL6A3	NM_004369.4 linkuse as main transcript	c.7007C>T	p.Pro2336Leu	missense_variant	31/44	ENST00000295550.9
COL6A3	NM_057167.4 linkuse as main transcript	c.6389C>T	p.Pro2130Leu	missense_variant	30/43
COL6A3	NM_057166.5 linkuse as main transcript	c.5186C>T	p.Pro1729Leu	missense_variant	28/41

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL6A3	ENST00000295550.9 linkuse as main transcript	c.7007C>T	p.Pro2336Leu	missense_variant	31/44	1	NM_004369.4	P1	P12111-1
COL6A3	ENST00000472056.5 linkuse as main transcript	c.5186C>T	p.Pro1729Leu	missense_variant	28/41	1			P12111-4
COL6A3	ENST00000353578.9 linkuse as main transcript	c.6389C>T	p.Pro2130Leu	missense_variant	30/43	5			P12111-2
COL6A3	ENST00000491769.1 linkuse as main transcript	n.1261C>T		non_coding_transcript_exon_variant	8/20	5

Frequencies

GnomAD3 genomes

AF:

0.000894

AC:

136

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00877

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00217

AC:

534

AN:

246620

Hom.:

AF XY:

0.00177

AC XY:

235

AN XY:

133066

show subpopulations

Gnomad AFR exome

AF:

0.0000636

Gnomad AMR exome

AF:

0.0154

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:

0.00

Gnomad OTH exome

AF:

0.00115

GnomAD4 exome

AF:

0.000443

AC:

646

AN:

1459130

Hom.:

Cov.:

AF XY:

0.000390

AC XY:

283

AN XY:

725424

show subpopulations

Gnomad4 AFR exome

AF:

0.0000897

Gnomad4 AMR exome

AF:

0.0141

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:

0.00000720

Gnomad4 OTH exome

AF:

0.000182

GnomAD4 genome

AF:

0.000893

AC:

136

AN:

152268

Hom.:

Cov.:

AF XY:

0.00102

AC XY:

AN XY:

74462

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00876

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000692

Hom.:

Bravo

AF:

0.00158

ExAC

AF:

0.00162

AC:

197

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 08, 2013

There is insufficient or conflicting evidence for classification of this alteration. -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Eurofins Ntd Llc (ga)

Jul 28, 2015

- -

Collagen 6-related myopathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Bethlem myopathy 1A

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 19, 2024

- -

COL6A3-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Jun 06, 2019

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

not provided

Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

May 18, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.077

BayesDel_noAF

Uncertain

0.13

Cadd

Pathogenic

Dann

Uncertain

1.0

Eigen

Benign

0.15

Eigen_PC

Benign

0.22

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.92

D;D;D;D;.

MetaRNN

Benign

0.013

T;T;T;T;T

MetaSVM

Pathogenic

1.0

MutationTaster

Benign

1.0

D;D;D;D;D;D

PrimateAI

Uncertain

0.53

PROVEAN

Pathogenic

-6.1

D;D;D;.;D

REVEL

Pathogenic

0.69

Sift

Uncertain

0.0030

D;D;D;.;D

Sift4G

Uncertain

0.0020

D;D;D;D;D

Polyphen

0.20

B;D;.;.;B

Vest4

0.71

MutPred

0.37

.;Gain of MoRF binding (P = 0.059);.;.;.;

MVP

0.92

MPC

0.15

ClinPred

0.13

GERP RS

3.7

Varity_R

0.43

gMVP

0.41

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