rs202092407

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Benign. The variant received -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

Publications

2 publications found

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 Gene-Disease associations (from GenCC):

Bethlem myopathy 1A
Inheritance: AD, AR, SD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Ambry Genetics
collagen 6-related myopathy
Inheritance: AD, AR Classification: DEFINITIVE Submitted by: ClinGen
Ullrich congenital muscular dystrophy 1C
Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
dystonia 27
Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED, NO_KNOWN Submitted by: Illumina, Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics, Orphanet
Ullrich congenital muscular dystrophy 1A
Inheritance: AR, AD, SD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Genomics England PanelApp
Bethlem myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Ullrich congenital muscular dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

COL6A3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -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 VariationId is 166938.

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 the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 10 AD,AR,SD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
COL6A3	NM_004369.4 link	c.7007C>T	p.Pro2336Leu	missense_variant	Exon 31 of 44	ENST00000295550.9	NP_004360.2
COL6A3	NM_057167.4 link	c.6389C>T	p.Pro2130Leu	missense_variant	Exon 30 of 43		NP_476508.2
COL6A3	NM_057166.5 link	c.5186C>T	p.Pro1729Leu	missense_variant	Exon 28 of 41		NP_476507.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
COL6A3	ENST00000295550.9 link	c.7007C>T	p.Pro2336Leu	missense_variant	Exon 31 of 44	1	NM_004369.4	ENSP00000295550.4
COL6A3	ENST00000472056.5 link	c.5186C>T	p.Pro1729Leu	missense_variant	Exon 28 of 41	1		ENSP00000418285.1
COL6A3	ENST00000353578.9 link	c.6389C>T	p.Pro2130Leu	missense_variant	Exon 30 of 43	5		ENSP00000315873.4
COL6A3	ENST00000491769.1 link	n.1261C>T		non_coding_transcript_exon_variant	Exon 8 of 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

GnomAD2 exomes

AF:

0.00217

AC:

534

AN:

246620

AF XY:

0.00177

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 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

African (AFR)

AF:

0.0000897

AC:

AN:

33460

American (AMR)

AF:

0.0141

AC:

624

AN:

44370

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26040

East Asian (EAS)

AF:

0.00

AC:

AN:

39680

South Asian (SAS)

AF:

0.00

AC:

AN:

85322

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53318

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00000720

AC:

AN:

1110858

Other (OTH)

AF:

0.000182

AC:

AN:

60320

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

124

165

206

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000893

AC:

136

AN:

152268

Hom.:

Cov.:

AF XY:

0.00102

AC XY:

AN XY:

74462

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41548

American (AMR)

AF:

0.00876

AC:

134

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5170

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68016

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.504

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000228

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

Oct 08, 2013

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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

not specified

Benign:1

Jul 28, 2015

Eurofins Ntd Llc (ga)

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Bethlem myopathy 1A

Benign:1

Dec 30, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Collagen 6-related myopathy

Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:1

May 18, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

COL6A3-related disorder

Benign:1

Jun 06, 2019

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

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). -

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

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.58

.;D;.;D;.

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

MutationAssessor

Benign

1.3

.;L;.;.;.

PhyloP100

6.0

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

Mutation Taster

=90/10

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

Splicevardb

2.0

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over