chr21-46132203-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP6

The NM_001849.4(COL6A2):c.2711C>T(p.Ala904Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000183 in 1,583,162 control chromosomes in the GnomAD database, including 1 homozygotes. 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. A904T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 34)

Exomes 𝑓: 0.00019 ( 1 hom. )

Consequence

COL6A2
NM_001849.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:1

Conservation

PhyloP100: 1.30

Publications

1 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: Likely_benign. The variant received -1 ACMG points.

BP6

Variant 21-46132203-C-T is Benign according to our data. Variant chr21-46132203-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 289567.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL6A2	NM_001849.4 link	c.2711C>T	p.Ala904Val	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.2711C>T	p.Ala904Val	missense_variant	Exon 28 of 28	1	NM_001849.4	ENSP00000300527.4		P12110-1

Frequencies

GnomAD3 genomes

AF:

0.000125

AC:

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000471

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.000956

GnomAD2 exomes

AF:

0.000336

AC:

AN:

196642

AF XY:

0.000242

show subpopulations

Gnomad AFR exome

AF:

0.000175

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000142

Gnomad FIN exome

AF:

0.000495

Gnomad NFE exome

AF:

0.000614

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000189

AC:

271

AN:

1430970

Hom.:

Cov.:

AF XY:

0.000166

AC XY:

118

AN XY:

709750

show subpopulations

African (AFR)

AF:

0.0000307

AC:

AN:

32624

American (AMR)

AF:

0.0000496

AC:

AN:

40334

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25558

East Asian (EAS)

AF:

0.0000532

AC:

AN:

37604

South Asian (SAS)

AF:

0.0000482

AC:

AN:

82974

European-Finnish (FIN)

AF:

0.000674

AC:

AN:

48930

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5736

European-Non Finnish (NFE)

AF:

0.000189

AC:

207

AN:

1097956

Other (OTH)

AF:

0.000354

AC:

AN:

59254

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

116

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.000125

AC:

AN:

152192

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74342

show subpopulations

African (AFR)

AF:

0.000121

AC:

AN:

41448

American (AMR)

AF:

0.00

AC:

AN:

15276

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.000192

AC:

AN:

5196

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.000471

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

68028

Other (OTH)

AF:

0.000956

AC:

AN:

2092

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:

0.000112

Hom.:

Bravo

AF:

0.000147

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000350

AC:

ExAC

AF:

0.000640

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Aug 16, 2022

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 29, 2016

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 14, 2020

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Bethlem myopathy 1A

Benign:1

Dec 05, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.12

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.32

Eigen

Uncertain

0.25

Eigen_PC

Benign

0.15

FATHMM_MKL

Uncertain

0.77

LIST_S2

Benign

0.64

M_CAP

Pathogenic

0.29

MetaRNN

Uncertain

0.44

MetaSVM

Uncertain

0.33

MutationAssessor

Uncertain

2.1

PhyloP100

1.3

PrimateAI

Benign

0.46

PROVEAN

Benign

-1.6

REVEL

Uncertain

0.63

Sift

Uncertain

0.026

Sift4G

Benign

0.086

Polyphen

1.0

Vest4

0.63

MVP

0.93

MPC

0.59

ClinPred

0.078

GERP RS

4.2

Varity_R

0.18

gMVP

0.69

Mutation Taster

=90/10

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