rs3870340

Variant names:

• chr3-49499216-G-C
• rs3870340
• NM_004393.6:c.-116-11203G>C

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_004393.6(DAG1):​c.-116-11203G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.976 in 152,268 control chromosomes in the GnomAD database, including 72,642 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.98 (72642 hom., cov: 31)
• Consequence: DAG1 NM_004393.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0100
• Publications: 0 publications found

Genes affected

DAG1 (HGNC:2666): (dystroglycan 1) This gene encodes dystroglycan, a central component of dystrophin-glycoprotein complex that links the extracellular matrix and the cytoskeleton in the skeletal muscle. The encoded preproprotein undergoes O- and N-glycosylation, and proteolytic processing to generate alpha and beta subunits. Certain mutations in this gene are known to cause distinct forms of muscular dystrophy. Alternative splicing results in multiple transcript variants, all encoding the same protein. [provided by RefSeq, Nov 2015]

DAG1 Gene-Disease associations (from GenCC):

• autosomal recessive limb-girdle muscular dystrophy type 2P

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Genomics England PanelApp, Orphanet
• muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A9

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• muscular dystrophy-dystroglycanopathy, type A

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• isolated asymptomatic elevation of creatine phosphokinase

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.98).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.993 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DAG1	NM_004393.6	c.-116-11203G>C		intron_variant	Intron 1 of 2	ENST00000308775.7	NP_004384.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DAG1	ENST00000308775.7	c.-116-11203G>C		intron_variant	Intron 1 of 2	1	NM_004393.6	ENSP00000312435.2

Frequencies

GnomAD3 genomes AF: 0.976 AC: 148504 AN: 152150 Hom.: 72587 Cov.: 31

Gnomad AFR AF: 0.916

Gnomad AMI AF: 1.00

Gnomad AMR AF: 0.992

Gnomad ASJ AF: 1.00

Gnomad EAS AF: 1.00

Gnomad SAS AF: 1.00

Gnomad FIN AF: 1.00

Gnomad MID AF: 1.00

Gnomad NFE AF: 1.00

Gnomad OTH AF: 0.987

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.976 AC: 148618 AN: 152268 Hom.: 72642 Cov.: 31 AF XY: 0.976 AC XY: 72680 AN XY: 74450

African (AFR) AF: 0.916 AC: 38023 AN: 41508

American (AMR) AF: 0.992 AC: 15167 AN: 15286

Ashkenazi Jewish (ASJ) AF: 1.00 AC: 3472 AN: 3472

East Asian (EAS) AF: 1.00 AC: 5188 AN: 5188

South Asian (SAS) AF: 1.00 AC: 4824 AN: 4826

European-Finnish (FIN) AF: 1.00 AC: 10622 AN: 10622

Middle Eastern (MID) AF: 1.00 AC: 294 AN: 294

European-Non Finnish (NFE) AF: 1.00 AC: 68029 AN: 68046

Other (OTH) AF: 0.987 AC: 2087 AN: 2114

Alfa AF: 0.986 Hom.: 9197

Bravo AF: 0.973

Asia WGS AF: 0.995 AC: 3462 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.98
CADD	Benign	2.9
DANN	Benign	0.53
PhyloP100		0.010
Mutation Taster		=100/0	polymorphism (auto)

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: rs3870340; hg19: chr3-49536649;