rs368064647

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP3_Moderate

The NM_001849.4(COL6A2):c.638G>A(p.Arg213His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000354 in 1,611,566 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R213C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

COL6A2
NM_001849.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 9.71

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.912

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
COL6A2	NM_001849.4 linkuse as main transcript	c.638G>A	p.Arg213His	missense_variant	3/28	ENST00000300527.9
COL6A2	NM_058174.3 linkuse as main transcript	c.638G>A	p.Arg213His	missense_variant	3/28	ENST00000397763.6
COL6A2	NM_058175.3 linkuse as main transcript	c.638G>A	p.Arg213His	missense_variant	3/28

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL6A2	ENST00000300527.9 linkuse as main transcript	c.638G>A	p.Arg213His	missense_variant	3/28	1	NM_001849.4	P1	P12110-1
COL6A2	ENST00000397763.6 linkuse as main transcript	c.638G>A	p.Arg213His	missense_variant	3/28	5	NM_058174.3		P12110-2
COL6A2	ENST00000409416.6 linkuse as main transcript	c.638G>A	p.Arg213His	missense_variant	2/27	5			P12110-3
COL6A2	ENST00000460886.1 linkuse as main transcript	n.84G>A		non_coding_transcript_exon_variant	1/2	2

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152068

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000725

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000492

AC:

AN:

243762

Hom.:

AF XY:

0.0000375

AC XY:

AN XY:

133336

show subpopulations

Gnomad AFR exome

AF:

0.000130

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000642

Gnomad OTH exome

AF:

0.000333

GnomAD4 exome

AF:

0.0000343

AC:

AN:

1459498

Hom.:

Cov.:

AF XY:

0.0000427

AC XY:

AN XY:

726134

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000405

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152068

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74262

show subpopulations

Gnomad4 AFR

AF:

0.0000725

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000136

Hom.:

Bravo

AF:

0.0000869

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Nov 01, 2016	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Nov 17, 2017	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Apr 30, 2022	In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 30564623) -

Bethlem myopathy 1A

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Nov 14, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on COL6A2 protein function. ClinVar contains an entry for this variant (Variation ID: 282526). This variant has not been reported in the literature in individuals affected with COL6A2-related conditions. This variant is present in population databases (rs368064647, gnomAD 0.008%). This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 213 of the COL6A2 protein (p.Arg213His). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.55

BayesDel_addAF

Uncertain

0.15

BayesDel_noAF

Pathogenic

0.22

Cadd

Pathogenic

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.62

D;.;.;.

Eigen

Pathogenic

0.70

Eigen_PC

Uncertain

0.64

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.95

D;D;.;D

M_CAP

Pathogenic

0.66

MetaRNN

Pathogenic

0.91

D;D;D;D

MetaSVM

Uncertain

0.40

MutationAssessor

Uncertain

2.4

M;M;M;M

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Benign

0.48

PROVEAN

Uncertain

-4.0

D;D;D;D

REVEL

Pathogenic

0.77

Sift

Pathogenic

0.0

D;D;D;D

Sift4G

Uncertain

0.0080

D;D;D;D

Polyphen

1.0

D;D;D;D

Vest4

0.71

MVP

0.97

MPC

0.48

ClinPred

0.82

GERP RS

4.2

Varity_R

0.72

gMVP

0.74

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over