rs113857622

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001849.4(COL6A2):c.1672-12G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00179 in 1,612,802 control chromosomes in the GnomAD database, including 37 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0089 ( 15 hom., cov: 33)

Exomes 𝑓: 0.0010 ( 22 hom. )

Consequence

COL6A2
NM_001849.4 intron

Scores

Splicing: ADA: 0.0001694

Clinical Significance

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

Conservation

PhyloP100: 0.531

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

collagen 6-related myopathy
Inheritance: AD, AR Classification: DEFINITIVE Submitted by: ClinGen
Ullrich congenital muscular dystrophy 1B
Inheritance: AR, AD Classification: DEFINITIVE Submitted by: G2P
Bethlem myopathy 1A
Inheritance: AD, AR Classification: STRONG Submitted by: Genomics England PanelApp
Ullrich congenital muscular dystrophy 1A
Inheritance: AD, AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
Bethlem myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Ullrich congenital muscular dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
myosclerosis
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

COL6A2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.75).

BP6

Variant 21-46124639-G-A is Benign according to our data. Variant chr21-46124639-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 258318.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 = 0.00891 (1355/152136) while in subpopulation AFR AF = 0.0304 (1259/41464). AF 95% confidence interval is 0.029. There are 15 homozygotes in GnomAd4. There are 636 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 15 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
COL6A2	NM_001849.4 link	c.1672-12G>A	intron_variant	Intron 21 of 27	ENST00000300527.9	NP_001840.3	P12110-1A0A384MDP3
COL6A2	NM_058174.3 link	c.1672-12G>A	intron_variant	Intron 21 of 27		NP_478054.2	P12110-2
COL6A2	NM_058175.3 link	c.1672-12G>A	intron_variant	Intron 21 of 27		NP_478055.2	P12110-3

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
COL6A2	ENST00000300527.9 link	c.1672-12G>A	intron_variant	Intron 21 of 27	1	NM_001849.4	ENSP00000300527.4	P12110-1
COL6A2	ENST00000397763.6 link	c.1672-12G>A	intron_variant	Intron 21 of 27	5		ENSP00000380870.1	P12110-2
COL6A2	ENST00000409416.6 link	c.1672-12G>A	intron_variant	Intron 20 of 26	5		ENSP00000387115.1	P12110-3
COL6A2	ENST00000413758.1 link	c.295-12G>A	intron_variant	Intron 6 of 10	3		ENSP00000395751.1	H7C0M5

Frequencies

GnomAD3 genomes

AF:

0.00889

AC:

1352

AN:

152018

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0304

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00386

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000177

Gnomad OTH

AF:

0.00956

GnomAD2 exomes

AF:

0.00260

AC:

649

AN:

249892

AF XY:

0.00196

show subpopulations

Gnomad AFR exome

AF:

0.0339

Gnomad AMR exome

AF:

0.00229

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000160

Gnomad OTH exome

AF:

0.00148

GnomAD4 exome

AF:

0.00105

AC:

1531

AN:

1460666

Hom.:

Cov.:

AF XY:

0.000889

AC XY:

646

AN XY:

726646

show subpopulations

African (AFR)

AF:

0.0322

AC:

1077

AN:

33456

American (AMR)

AF:

0.00224

AC:

100

AN:

44704

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000348

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52394

Middle Eastern (MID)

AF:

0.00104

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.000177

AC:

197

AN:

1111900

Other (OTH)

AF:

0.00245

AC:

148

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.446

Heterozygous variant carriers

153

230

306

383

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

126

168

210

<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:

0.00891

AC:

1355

AN:

152136

Hom.:

Cov.:

AF XY:

0.00855

AC XY:

636

AN XY:

74364

show subpopulations

African (AFR)

AF:

0.0304

AC:

1259

AN:

41464

American (AMR)

AF:

0.00386

AC:

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.000207

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.0136

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000177

AC:

AN:

67966

Other (OTH)

AF:

0.00946

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.494

Heterozygous variant carriers

136

204

272

340

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome 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

Alfa

AF:

0.00241

Hom.:

Bravo

AF:

0.0102

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

Jan 06, 2017

GeneDx

Significance: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. -

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Bethlem myopathy 1A

Benign:1

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Collagen 6-related myopathy

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.75

CADD

Benign

5.7

(source)

DANN

Benign

0.69

PhyloP100

0.53

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00017

dbscSNV1_RF

Benign

0.010

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