2-237365703-C-G

Position:

chr2-237365703-C-G

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBP6

The NM_004369.4(COL6A3):c.5833G>C(p.Val1945Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000339 in 1,614,172 control chromosomes in the GnomAD database, including 1 homozygotes. 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 0.00030 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00034 ( 0 hom. )

Consequence

COL6A3
NM_004369.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:2

Conservation

PhyloP100: 1.63

Variant links:

Genes affected

COL6A3 (HGNC:2213): (collagen type VI alpha 3 chain) This gene encodes the alpha-3 chain, one of the three alpha chains of type VI collagen, a beaded filament collagen found in most connective tissues. The alpha-3 chain of type VI collagen is much larger than the alpha-1 and -2 chains. This difference in size is largely due to an increase in the number of subdomains, similar to von Willebrand Factor type A domains, that are found in the amino terminal globular domain of all the alpha chains. 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 the type VI collagen genes are associated with Bethlem myopathy, a rare autosomal dominant proximal myopathy with early childhood onset. Mutations in this gene are also a cause of Ullrich congenital muscular dystrophy, also referred to as Ullrich scleroatonic muscular dystrophy, an autosomal recessive congenital myopathy that is more severe than Bethlem myopathy. Multiple transcript variants have been identified, but the full-length nature of only some of these variants has been described. [provided by RefSeq, Jun 2009]

COL6A3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.25190145).

BP6

Variant 2-237365703-C-G is Benign according to our data. Variant chr2-237365703-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 281820.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Benign=1, Uncertain_significance=4}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
COL6A3	NM_004369.4 linkuse as main transcript	c.5833G>C	p.Val1945Leu	missense_variant	12/44	ENST00000295550.9	NP_004360.2
COL6A3	NM_057167.4 linkuse as main transcript	c.5215G>C	p.Val1739Leu	missense_variant	11/43		NP_476508.2
COL6A3	NM_057166.5 linkuse as main transcript	c.4012G>C	p.Val1338Leu	missense_variant	9/41		NP_476507.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL6A3	ENST00000295550.9 linkuse as main transcript	c.5833G>C	p.Val1945Leu	missense_variant	12/44	1	NM_004369.4	ENSP00000295550	P1	P12111-1
COL6A3	ENST00000472056.5 linkuse as main transcript	c.4012G>C	p.Val1338Leu	missense_variant	9/41	1		ENSP00000418285		P12111-4
COL6A3	ENST00000353578.9 linkuse as main transcript	c.5215G>C	p.Val1739Leu	missense_variant	11/43	5		ENSP00000315873		P12111-2

Frequencies

GnomAD3 genomes

AF:

0.000302

AC:

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000514

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.000256

AC:

AN:

250188

Hom.:

AF XY:

0.000273

AC XY:

AN XY:

135342

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.0000867

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000498

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000343

AC:

501

AN:

1461840

Hom.:

Cov.:

AF XY:

0.000331

AC XY:

241

AN XY:

727220

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000423

Gnomad4 OTH exome

AF:

0.000232

GnomAD4 genome

AF:

0.000302

AC:

AN:

152332

Hom.:

Cov.:

AF XY:

0.000269

AC XY:

AN XY:

74486

show subpopulations

Gnomad4 AFR

AF:

0.000168

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000514

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.000399

Hom.:

Bravo

AF:

0.000280

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000288

AC:

EpiCase

AF:

0.000273

EpiControl

AF:

0.000711

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:6

Uncertain significance, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jul 01, 2017	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Dec 19, 2016	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Dec 30, 2020	- -
Uncertain significance, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Dec 16, 2023	Reported in an individual with developmental delay and hypotonia and in another individual with suspected limb-girdle muscular dystrophy; however, detailed clinical and segregation information was not provided (PMID: 26284228, 30564623); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 30564623, 26284228) -

Collagen 6-related myopathy

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jul 25, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to rule this variant out of causing disease. Therefore, this variant is classified as benign. -

Bethlem myopathy 1A

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 08, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.32

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.29

CADD

Benign

DANN

Benign

0.79

DEOGEN2

Benign

0.26

.;T;.;T;.

Eigen

Uncertain

0.26

Eigen_PC

Uncertain

0.23

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.93

D;D;D;D;.

M_CAP

Benign

0.026

MetaRNN

Benign

0.25

T;T;T;T;T

MetaSVM

Benign

-0.80

MutationAssessor

Uncertain

2.8

.;M;.;.;.

MutationTaster

Benign

0.51

D;D;D;D;D;D

PrimateAI

Benign

0.46

PROVEAN

Benign

-2.0

N;N;N;.;N

REVEL

Benign

0.11

Sift

Uncertain

0.0080

D;D;D;.;D

Sift4G

Uncertain

0.0090

D;D;D;D;D

Polyphen

0.96

D;D;.;.;D

Vest4

0.48

MutPred

0.37

.;Loss of methylation at K1946 (P = 0.0388);.;.;.;

MVP

0.67

MPC

0.33

ClinPred

0.12

GERP RS

5.1

Varity_R

0.16

gMVP

0.58

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