chr21-46111498-G-A

Position:

chr21-46111498-G-A

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BP4_Strong

The NM_001849.4(COL6A2):c.22G>A(p.Val8Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000135 in 1,612,646 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

COL6A2
NM_001849.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: -0.0490

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:

LOC124905043 (HGNC:):

LOC124905043 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.017417401).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
COL6A2	NM_001849.4 linkuse as main transcript	c.22G>A	p.Val8Met	missense_variant	2/28	ENST00000300527.9
COL6A2	NM_058174.3 linkuse as main transcript	c.22G>A	p.Val8Met	missense_variant	2/28	ENST00000397763.6
LOC124905043	XR_007067910.1 linkuse as main transcript	n.534C>T		non_coding_transcript_exon_variant	1/2
COL6A2	NM_058175.3 linkuse as main transcript	c.22G>A	p.Val8Met	missense_variant	2/28

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL6A2	ENST00000300527.9 linkuse as main transcript	c.22G>A	p.Val8Met	missense_variant	2/28	1	NM_001849.4	P1	P12110-1
COL6A2	ENST00000397763.6 linkuse as main transcript	c.22G>A	p.Val8Met	missense_variant	2/28	5	NM_058174.3		P12110-2
COL6A2	ENST00000409416.6 linkuse as main transcript	c.22G>A	p.Val8Met	missense_variant	1/27	5			P12110-3
COL6A2	ENST00000436769.5 linkuse as main transcript	c.22G>A	p.Val8Met	missense_variant	2/3	2

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000720

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000473

AC:

118

AN:

249296

Hom.:

AF XY:

0.000325

AC XY:

AN XY:

135430

show subpopulations

Gnomad AFR exome

AF:

0.000125

Gnomad AMR exome

AF:

0.00226

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00101

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000268

Gnomad OTH exome

AF:

0.000656

GnomAD4 exome

AF:

0.000138

AC:

201

AN:

1460360

Hom.:

Cov.:

AF XY:

0.000131

AC XY:

AN XY:

726404

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.00204

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000101

Gnomad4 SAS exome

AF:

0.000684

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000288

Gnomad4 OTH exome

AF:

0.000199

GnomAD4 genome

AF:

0.000105

AC:

AN:

152286

Hom.:

Cov.:

AF XY:

0.000107

AC XY:

AN XY:

74456

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.000719

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000415

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000102

Hom.:

Bravo

AF:

0.000238

ExAC

AF:

0.000528

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

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

Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Feb 21, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Oct 10, 2016	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Nov 02, 2021	In silico analysis supports that this missense variant does not alter 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

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 22, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.097

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.26

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Benign

0.20

T;.;T;.;.

Eigen

Benign

-0.83

Eigen_PC

Benign

-0.93

FATHMM_MKL

Benign

0.058

LIST_S2

Benign

0.64

T;T;T;.;T

M_CAP

Pathogenic

0.38

MetaRNN

Benign

0.017

T;T;T;T;T

MetaSVM

Benign

-0.30

MutationAssessor

Benign

1.8

L;L;.;L;L

MutationTaster

Benign

1.0

N;N;N;N;N

PrimateAI

Uncertain

0.53

PROVEAN

Benign

-0.51

N;N;N;N;N

REVEL

Benign

0.28

Sift

Benign

0.043

D;D;D;D;D

Sift4G

Benign

0.094

T;T;T;T;T

Polyphen

0.0080

B;P;.;P;D

Vest4

0.12

MVP

0.81

MPC

0.14

ClinPred

0.0098

GERP RS

1.2

Varity_R

0.036

gMVP

0.23

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