rs35139588

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.2983G>A(p.Ala995Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00197 in 1,606,758 control chromosomes in the GnomAD database, including 38 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. A995A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0094 ( 17 hom., cov: 34)

Exomes 𝑓: 0.0012 ( 21 hom. )

Consequence

COL6A2
NM_001849.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: 6.43

Publications

5 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 (MetaRNN=0.009098977).

BP6

Variant 21-46132475-G-A is Benign according to our data. Variant chr21-46132475-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 93951.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 = 0.00945 (1439/152354) while in subpopulation AFR AF = 0.0309 (1285/41578). AF 95% confidence interval is 0.0295. There are 17 homozygotes in GnomAd4. There are 699 alleles in the male GnomAd4 subpopulation. Median coverage is 34. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 17 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL6A2	NM_001849.4 link	c.2983G>A	p.Ala995Thr	missense_variant	Exon 28 of 28	ENST00000300527.9	NP_001840.3	P12110-1A0A384MDP3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL6A2	ENST00000300527.9 link	c.2983G>A	p.Ala995Thr	missense_variant	Exon 28 of 28	1	NM_001849.4	ENSP00000300527.4		P12110-1

Frequencies

GnomAD3 genomes

AF:

0.00942

AC:

1434

AN:

152236

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0309

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00739

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:

0.000323

Gnomad OTH

AF:

0.00907

GnomAD2 exomes

AF:

0.00259

AC:

623

AN:

240084

AF XY:

0.00194

show subpopulations

Gnomad AFR exome

AF:

0.0323

Gnomad AMR exome

AF:

0.00207

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000545

Gnomad NFE exome

AF:

0.000308

Gnomad OTH exome

AF:

0.00117

GnomAD4 exome

AF:

0.00118

AC:

1720

AN:

1454404

Hom.:

Cov.:

AF XY:

0.00105

AC XY:

762

AN XY:

723268

show subpopulations

African (AFR)

AF:

0.0337

AC:

1126

AN:

33416

American (AMR)

AF:

0.00218

AC:

AN:

44588

Ashkenazi Jewish (ASJ)

AF:

0.0000384

AC:

AN:

26062

East Asian (EAS)

AF:

0.000227

AC:

AN:

39592

South Asian (SAS)

AF:

0.0000929

AC:

AN:

86124

European-Finnish (FIN)

AF:

0.0000205

AC:

AN:

48762

Middle Eastern (MID)

AF:

0.000868

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.000301

AC:

334

AN:

1109896

Other (OTH)

AF:

0.00231

AC:

139

AN:

60202

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

107

215

322

430

537

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:

0.00945

AC:

1439

AN:

152354

Hom.:

Cov.:

AF XY:

0.00938

AC XY:

699

AN XY:

74500

show subpopulations

African (AFR)

AF:

0.0309

AC:

1285

AN:

41578

American (AMR)

AF:

0.00738

AC:

113

AN:

15312

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000323

AC:

AN:

68028

Other (OTH)

AF:

0.00898

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

145

217

290

362

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:

0.00322

Hom.:

Bravo

AF:

0.0108

ESP6500AA

AF:

0.0257

AC:

113

ESP6500EA

AF:

0.000582

AC:

ExAC

AF:

0.00272

AC:

329

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.000491

EpiControl

AF:

0.000534

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:3

May 18, 2016

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. -

Nov 16, 2012

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Genetic Services Laboratory, University of Chicago

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -

not provided

Benign:2

May 03, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Myosclerosis

Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Bethlem myopathy 1A

Benign:1

Jan 29, 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 12, 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

AlphaMissense

Uncertain

0.35

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.21

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.24

Eigen

Uncertain

0.35

Eigen_PC

Uncertain

0.29

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.86

MetaRNN

Benign

0.0091

MetaSVM

Benign

-0.34

MutationAssessor

Uncertain

2.4

PhyloP100

6.4

PrimateAI

Uncertain

0.50

PROVEAN

Benign

-1.2

REVEL

Uncertain

0.47

Sift

Benign

0.17

Sift4G

Benign

0.11

Polyphen

0.99

Vest4

0.64

MVP

0.87

MPC

0.50

ClinPred

0.035

GERP RS

3.4

Varity_R

0.052

gMVP

0.81

Mutation Taster

=86/14

polymorphism

(source)

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

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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