rs140517685

Positions:

chr21-45999159-G-A

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_001848.3(COL6A1):c.1681G>A(p.Asp561Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000662 in 1,600,250 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 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 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000070 ( 0 hom. )

Consequence

COL6A1
NM_001848.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 0.965

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 Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.03316769).

BP6

Variant 21-45999159-G-A is Benign according to our data. Variant chr21-45999159-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 542984.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Benign=1}.

BS1

Variant frequency is greater than expected in population sas. gnomad4_exome allele frequency = 0.0000698 (101/1447868) while in subpopulation SAS AF= 0.000311 (26/83696). AF 95% confidence interval is 0.000217. There are 0 homozygotes in gnomad4_exome. There are 58 alleles in male gnomad4_exome subpopulation. Median coverage is 33. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL6A1	NM_001848.3 link	c.1681G>A	p.Asp561Asn	missense_variant	26/35	ENST00000361866.8	NP_001839.2	P12109A0A384P5H7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL6A1	ENST00000361866.8 link	c.1681G>A	p.Asp561Asn	missense_variant	26/35	1	NM_001848.3	ENSP00000355180.3		P12109

Frequencies

GnomAD3 genomes

AF:

0.0000328

AC:

AN:

152264

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000659

AC:

AN:

227762

Hom.:

AF XY:

0.0000814

AC XY:

AN XY:

122794

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000324

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000587

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000698

AC:

101

AN:

1447868

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

718740

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:

0.000311

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000669

Gnomad4 OTH exome

AF:

0.0000167

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152382

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74508

show subpopulations

Gnomad4 AFR

AF:

0.0000240

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000764

Hom.:

Bravo

AF:

0.0000529

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000662

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

Apr 01, 2019

- -

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 12, 2024

The COL6A1 c.1681G>A variant is predicted to result in the amino acid substitution p.Asp561Asn. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.032% of alleles in individuals of South Asian descent in gnomAD, which is likely too common for an autosomal dominant variant. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Bethlem myopathy 1A

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 06, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.070

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.20

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.15

T;T

Eigen

Benign

-0.94

Eigen_PC

Benign

-0.91

FATHMM_MKL

Benign

0.062

LIST_S2

Benign

0.39

T;T

M_CAP

Uncertain

0.095

MetaRNN

Benign

0.033

T;T

MetaSVM

Benign

-0.48

MutationAssessor

Benign

1.3

L;.

PrimateAI

Uncertain

0.66

PROVEAN

Benign

-0.69

N;.

REVEL

Benign

0.13

Sift

Benign

0.33

T;.

Sift4G

Benign

0.40

T;T

Polyphen

0.031

B;.

Vest4

0.27

MVP

0.69

MPC

0.25

ClinPred

0.022

GERP RS

2.6

Varity_R

0.043

gMVP

0.39

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