dbSNP rs111859552: COL6A3:p.Val2858Ile (chr2-237336528-C-T) – ACMG Classification: Benign (-20 pts)

Variant summary

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

The NM_004369.4(COL6A3):c.8572G>A(p.Val2858Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000776 in 1,614,136 control chromosomes in the GnomAD database, including 15 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0036 ( 7 hom., cov: 33)

Exomes 𝑓: 0.00048 ( 8 hom. )

Consequence

COL6A3
NM_004369.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: -0.889

Publications

6 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 -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0036545992).

BP6

Variant 2-237336528-C-T is Benign according to our data. Variant chr2-237336528-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 128823.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 = 0.00362 (551/152332) while in subpopulation AFR AF = 0.0124 (517/41574). AF 95% confidence interval is 0.0115. There are 7 homozygotes in GnomAd4. There are 262 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 7 AD,AR,SD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004369.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
COL6A3	NM_004369.4	MANE Select	c.8572G>A	p.Val2858Ile	missense	Exon 40 of 44	NP_004360.2
COL6A3	NM_057167.4		c.7954G>A	p.Val2652Ile	missense	Exon 39 of 43	NP_476508.2
COL6A3	NM_057166.5		c.6751G>A	p.Val2251Ile	missense	Exon 37 of 41	NP_476507.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
COL6A3	ENST00000295550.9	TSL:1 MANE Select	c.8572G>A	p.Val2858Ile	missense	Exon 40 of 44	ENSP00000295550.4
COL6A3	ENST00000472056.5	TSL:1	c.6751G>A	p.Val2251Ile	missense	Exon 37 of 41	ENSP00000418285.1
COL6A3	ENST00000353578.9	TSL:5	c.7954G>A	p.Val2652Ile	missense	Exon 39 of 43	ENSP00000315873.4

Frequencies

GnomAD3 genomes

AF:

0.00357

AC:

543

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0123

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00105

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.00335

GnomAD2 exomes

AF:

0.00105

AC:

263

AN:

251434

AF XY:

0.000736

show subpopulations

Gnomad AFR exome

AF:

0.0115

Gnomad AMR exome

AF:

0.00121

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000167

Gnomad OTH exome

AF:

0.000815

GnomAD4 exome

AF:

0.000480

AC:

701

AN:

1461804

Hom.:

Cov.:

AF XY:

0.000419

AC XY:

305

AN XY:

727200

show subpopulations

African (AFR)

AF:

0.0118

AC:

396

AN:

33476

American (AMR)

AF:

0.00121

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000220

AC:

AN:

86250

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00329

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000131

AC:

146

AN:

1111944

Other (OTH)

AF:

0.00111

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.459

Heterozygous variant carriers

122

163

204

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:

0.00362

AC:

551

AN:

152332

Hom.:

Cov.:

AF XY:

0.00352

AC XY:

262

AN XY:

74490

show subpopulations

African (AFR)

AF:

0.0124

AC:

517

AN:

41574

American (AMR)

AF:

0.00105

AC:

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000147

AC:

AN:

68034

Other (OTH)

AF:

0.00331

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

114

142

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.00338

Hom.:

Bravo

AF:

0.00390

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00976

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.00114

AC:

138

Asia WGS

AF:

0.00404

AC:

AN:

3478

EpiCase

AF:

0.000273

EpiControl

AF:

0.000296

ClinVar

ClinVar submissions as Germline

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (3)

not provided (2)

Bethlem myopathy 1A (1)

Collagen 6-related myopathy (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.062

BayesDel_addAF

Benign

-0.52

BayesDel_noAF

Benign

-0.51

CADD

Benign

0.070

(source)

DANN

Benign

0.73

DEOGEN2

Benign

0.13

Eigen

Benign

-1.8

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.026

LIST_S2

Benign

0.53

MetaRNN

Benign

0.0037

MetaSVM

Benign

-0.70

MutationAssessor

Benign

0.36

PhyloP100

-0.89

PrimateAI

Benign

0.22

PROVEAN

Benign

-0.040

REVEL

Benign

0.23

Sift

Benign

0.36

Sift4G

Benign

0.41

Polyphen

0.0

Vest4

0.043

MVP

0.40

MPC

0.12

ClinPred

0.0025

GERP RS

-10

Varity_R

0.023

gMVP

0.12

Mutation Taster

=99/1

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over