Genetic Variant COL6A2:p.Glu182Gln (chr21-46112407-G-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_001849.4(COL6A2):c.544G>C(p.Glu182Gln) variant causes a missense change. The variant allele was found at a frequency of 0.000000687 in 1,456,316 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E182K) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

COL6A2
NM_001849.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 4.81

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:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.2906357).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL6A2	NM_001849.4 link	c.544G>C	p.Glu182Gln	missense_variant	Exon 3 of 28	ENST00000300527.9	NP_001840.3	P12110-1A0A384MDP3
COL6A2	NM_058174.3 link	c.544G>C	p.Glu182Gln	missense_variant	Exon 3 of 28		NP_478054.2	P12110-2
COL6A2	NM_058175.3 link	c.544G>C	p.Glu182Gln	missense_variant	Exon 3 of 28		NP_478055.2	P12110-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL6A2	ENST00000300527.9 link	c.544G>C	p.Glu182Gln	missense_variant	Exon 3 of 28	1	NM_001849.4	ENSP00000300527.4		P12110-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.87e-7

AC:

AN:

1456316

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

724604

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33448

American (AMR)

AF:

0.0000224

AC:

AN:

44596

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26060

East Asian (EAS)

AF:

0.00

AC:

AN:

39656

South Asian (SAS)

AF:

0.00

AC:

AN:

86128

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49234

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5760

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111180

Other (OTH)

AF:

0.00

AC:

AN:

60254

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.053

BayesDel_noAF

Benign

-0.31

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.18

T;.;.;.

Eigen

Benign

-0.040

Eigen_PC

Benign

0.082

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.94

D;D;.;D

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.29

T;T;T;T

MetaSVM

Benign

-0.70

MutationAssessor

Benign

0.93

L;L;L;L

PhyloP100

4.8

PrimateAI

Benign

0.39

PROVEAN

Benign

-0.45

N;N;N;N

REVEL

Benign

0.28

Sift

Benign

0.23

T;T;T;T

Sift4G

Benign

0.48

T;T;T;T

Polyphen

0.55

P;B;B;D

Vest4

0.36

MutPred

0.32

Gain of MoRF binding (P = 0.0362);Gain of MoRF binding (P = 0.0362);Gain of MoRF binding (P = 0.0362);Gain of MoRF binding (P = 0.0362);

MVP

0.89

MPC

0.19

ClinPred

0.96

GERP RS

4.3

Varity_R

0.15

gMVP

0.62

Mutation Taster

=91/9

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over