rs35911211

Variant names:

• chr2-237340570-C-T
• rs35911211
• NM_004369.4:c.8346G>A

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_004369.4(COL6A3):​c.8346G>A​(p.Glu2782Glu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000688 in 1,614,194 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0031 (1 hom., cov: 33)
  • Exomes 𝑓: 0.00043 (5 hom.)
• Consequence: COL6A3 NM_004369.4 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7
• Conservation: PhyloP100: -0.240
• Publications: 2 publications found

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 Gene-Disease associations (from GenCC):

• Bethlem myopathy 1A

  Inheritance: AR, AD, SD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Ambry Genetics
• collagen 6-related myopathy

  Inheritance: AR, SD, AD Classification: DEFINITIVE Submitted by: ClinGen
• Ullrich congenital muscular dystrophy 1C

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• dystonia 27

  Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED, NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, ClinGen, Ambry Genetics, Illumina
• Ullrich congenital muscular dystrophy 1A

  Inheritance: AR, AD, SD Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics
• Bethlem myopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Ullrich congenital muscular dystrophy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.69).
• BP6: Variant 2-237340570-C-T is Benign according to our data. Variant chr2-237340570-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 197032.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-0.24 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00312 (475/152302) while in subpopulation AFR AF = 0.00977 (406/41564). AF 95% confidence interval is 0.00898. There are 1 homozygotes in GnomAd4. There are 228 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.
• BS2: High Homozygotes in GnomAdExome4 at 5 AD,AR,SD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004369.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL6A3	NM_004369.4	MANE Select	c.8346G>A	p.Glu2782Glu	synonymous	Exon 38 of 44	NP_004360.2	D9ZGF2
	COL6A3	NM_057167.4		c.7728G>A	p.Glu2576Glu	synonymous	Exon 37 of 43	NP_476508.2	P12111-2
	COL6A3	NM_057166.5		c.6525G>A	p.Glu2175Glu	synonymous	Exon 35 of 41	NP_476507.3	P12111-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COL6A3	ENST00000295550.9	TSL:1 MANE Select	c.8346G>A	p.Glu2782Glu	synonymous	Exon 38 of 44	ENSP00000295550.4	P12111-1
	COL6A3	ENST00000472056.5	TSL:1	c.6525G>A	p.Glu2175Glu	synonymous	Exon 35 of 41	ENSP00000418285.1	P12111-4
	COL6A3	ENST00000353578.9	TSL:5	c.7728G>A	p.Glu2576Glu	synonymous	Exon 37 of 43	ENSP00000315873.4	P12111-2

Frequencies

GnomAD3 genomes AF: 0.00311 AC: 474 AN: 152184 Hom.: 1 Cov.: 33

Gnomad AFR AF: 0.00977

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00275

Gnomad ASJ AF: 0.00288

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000118

Gnomad OTH AF: 0.00430

GnomAD2 exomes AF: 0.00101 AC: 255 AN: 251490 AF XY: 0.000861

Gnomad AFR exome AF: 0.0103

Gnomad AMR exome AF: 0.00104

Gnomad ASJ exome AF: 0.00278

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000141

Gnomad OTH exome AF: 0.000978

GnomAD4 exome AF: 0.000434 AC: 635 AN: 1461892 Hom.: 5 Cov.: 33 AF XY: 0.000400 AC XY: 291 AN XY: 727248

African (AFR) AF: 0.0104 AC: 347 AN: 33480

American (AMR) AF: 0.00119 AC: 53 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00321 AC: 84 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000927 AC: 8 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.000520 AC: 3 AN: 5768

European-Non Finnish (NFE) AF: 0.0000576 AC: 64 AN: 1112012

Other (OTH) AF: 0.00126 AC: 76 AN: 60396

GnomAD4 genome AF: 0.00312 AC: 475 AN: 152302 Hom.: 1 Cov.: 33 AF XY: 0.00306 AC XY: 228 AN XY: 74478

African (AFR) AF: 0.00977 AC: 406 AN: 41564

American (AMR) AF: 0.00274 AC: 42 AN: 15306

Ashkenazi Jewish (ASJ) AF: 0.00288 AC: 10 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5176

South Asian (SAS) AF: 0.00 AC: 0 AN: 4818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000118 AC: 8 AN: 68022

Other (OTH) AF: 0.00426 AC: 9 AN: 2114

Alfa AF: 0.00151 Hom.: 0

Bravo AF: 0.00388

Asia WGS AF: 0.000577 AC: 2 AN: 3478

EpiCase AF: 0.0000545

EpiControl AF: 0.000237

ClinVar

ClinVar submissions

Significance: Benign/Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	3	not provided (3)
-	-	1	Bethlem myopathy 1A (1)
-	-	1	COL6A3-related disorder (1)
-	-	1	Collagen 6-related myopathy (1)
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.69
CADD	Benign	2.8
DANN	Benign	0.38
PhyloP100		-0.24
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs35911211; hg19: chr2-238249213;