rs148962954

Positions:

chr21-46002049-G-A

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_001848.3(COL6A1):c.2045G>A(p.Arg682Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000358 in 1,611,764 control chromosomes in the GnomAD database, including 1 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 34)

Exomes 𝑓: 0.00037 ( 1 hom. )

Consequence

COL6A1
NM_001848.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:4

Conservation

PhyloP100: 0.312

Variant links:

Genes affected

COL6A1 (HGNC:2211): (collagen type VI alpha 1 chain) The collagens are a superfamily of proteins that play a role in maintaining the integrity of various tissues. Collagens are extracellular matrix proteins and have a triple-helical domain as their common structural element. Collagen VI is a major structural component of microfibrils. The basic structural unit of collagen VI is a heterotrimer of the alpha1(VI), alpha2(VI), and alpha3(VI) chains. The alpha2(VI) and alpha3(VI) chains are encoded by the COL6A2 and COL6A3 genes, respectively. The protein encoded by this gene is the alpha 1 subunit of type VI collagen (alpha1(VI) chain). Mutations in the genes that code for the collagen VI subunits result in the autosomal dominant disorder, Bethlem myopathy. [provided by RefSeq, Jul 2008]

COL6A1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.06502798).

BP6

Variant 21-46002049-G-A is Benign according to our data. Variant chr21-46002049-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 196680.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Benign=1, Uncertain_significance=3}. Variant chr21-46002049-G-A is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL6A1	NM_001848.3 linkuse as main transcript	c.2045G>A	p.Arg682Gln	missense_variant	31/35	ENST00000361866.8	NP_001839.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL6A1	ENST00000361866.8 linkuse as main transcript	c.2045G>A	p.Arg682Gln	missense_variant	31/35	1	NM_001848.3	ENSP00000355180	P1

Frequencies

GnomAD3 genomes

AF:

0.000237

AC:

AN:

152148

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.000377

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000397

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000235

AC:

AN:

242066

Hom.:

AF XY:

0.000251

AC XY:

AN XY:

131716

show subpopulations

Gnomad AFR exome

AF:

0.0000641

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000662

Gnomad FIN exome

AF:

0.000382

Gnomad NFE exome

AF:

0.000410

Gnomad OTH exome

AF:

0.000337

GnomAD4 exome

AF:

0.000371

AC:

541

AN:

1459616

Hom.:

Cov.:

AF XY:

0.000388

AC XY:

282

AN XY:

726056

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000349

Gnomad4 FIN exome

AF:

0.000249

Gnomad4 NFE exome

AF:

0.000457

Gnomad4 OTH exome

AF:

0.000232

GnomAD4 genome

AF:

0.000237

AC:

AN:

152148

Hom.:

Cov.:

AF XY:

0.000202

AC XY:

AN XY:

74328

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.000377

Gnomad4 NFE

AF:

0.000397

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000277

Hom.:

Bravo

AF:

0.000227

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000239

AC:

EpiCase

AF:

0.000872

EpiControl

AF:

0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Nov 16, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Aug 17, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	May 01, 2024	COL6A1: PM2, BP4 -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

- -

Bethlem myopathy 1A

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 12, 2024

- -

Collagen 6-related myopathy

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.068

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.45

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.17

T;T

Eigen

Benign

-0.93

Eigen_PC

Benign

-0.86

FATHMM_MKL

Benign

0.037

LIST_S2

Benign

0.78

T;T

M_CAP

Benign

0.020

MetaRNN

Benign

0.065

T;T

MetaSVM

Benign

-0.92

MutationAssessor

Benign

0.20

N;.

MutationTaster

Benign

1.0

PrimateAI

Benign

0.38

PROVEAN

Benign

0.17

N;.

REVEL

Benign

0.066

Sift

Benign

0.26

T;.

Sift4G

Benign

0.25

T;T

Polyphen

0.030

B;.

Vest4

0.15

MVP

0.58

MPC

0.36

ClinPred

0.038

GERP RS

2.4

Varity_R

0.060

gMVP

0.22

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