rs761805565

Positions:

chr21-46111973-C-T

Variant summary

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

The NM_001849.4(COL6A2):c.116-6C>T variant causes a splice region, splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000745 in 1,610,630 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000074 ( 0 hom. )

Consequence

COL6A2
NM_001849.4 splice_region, splice_polypyrimidine_tract, intron

Scores

Splicing: ADA: 0.00002019

Clinical Significance

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

Conservation

PhyloP100: 2.26

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 -5 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.64).

BP6

Variant 21-46111973-C-T is Benign according to our data. Variant chr21-46111973-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 543008.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	#exon/exons	MANE
COL6A2	NM_001849.4 linkuse as main transcript	c.116-6C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000300527.9
COL6A2	NM_058174.3 linkuse as main transcript	c.116-6C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000397763.6
LOC124905043	XR_007067910.1 linkuse as main transcript	n.59G>A	non_coding_transcript_exon_variant	1/2
COL6A2	NM_058175.3 linkuse as main transcript	c.116-6C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant

Ensembl

Gene	Transcript	HGVSc	Effect	TSL	MANE	Appris	UniProt
COL6A2	ENST00000300527.9 linkuse as main transcript	c.116-6C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant	1	NM_001849.4	P1	P12110-1
COL6A2	ENST00000397763.6 linkuse as main transcript	c.116-6C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant	5	NM_058174.3		P12110-2
COL6A2	ENST00000409416.6 linkuse as main transcript	c.116-6C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant	5			P12110-3
COL6A2	ENST00000436769.5 linkuse as main transcript	c.116-6C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant	2

Frequencies

GnomAD3 genomes

AF:

0.0000789

AC:

AN:

152130

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000607

AC:

AN:

246968

Hom.:

AF XY:

0.0000745

AC XY:

AN XY:

134266

show subpopulations

Gnomad AFR exome

AF:

0.0000623

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000808

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000740

AC:

108

AN:

1458500

Hom.:

Cov.:

AF XY:

0.0000758

AC XY:

AN XY:

725650

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000201

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000872

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000789

AC:

AN:

152130

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74298

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000132

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000272

Hom.:

Bravo

AF:

0.0000718

EpiCase

AF:

0.000109

EpiControl

AF:

0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

May 10, 2023

Has not been previously published as pathogenic or benign to our knowledge; In silico analysis suggests this variant may impact gene splicing. In the absence of RNA/functional studies, the actual effect of this sequence change is unknown. -

Bethlem myopathy 1A

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Nov 24, 2023

- -

COL6A2-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 13, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.64

CADD

Benign

DANN

Benign

0.64

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000020

dbscSNV1_RF

Benign

0.0040

SpliceAI score (max)

0.22

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.22

Position offset: -10

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