X-31119880-G-T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_004006.3(DMD):c.*2039C>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00649 in 111,776 control chromosomes in the GnomAD database, including 21 homozygotes. There are 306 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.0065 (21 hom., 306 hem., cov: 23)
  • Exomes 𝑓: 0.0034 (0 hom. 0 hem.)
• Consequence: DMD NM_004006.3 3_prime_UTR
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -1.76

Genes affected

DMD (HGNC:2928): (dystrophin) This gene spans a genomic range of greater than 2 Mb and encodes a large protein containing an N-terminal actin-binding domain and multiple spectrin repeats. The encoded protein forms a component of the dystrophin-glycoprotein complex (DGC), which bridges the inner cytoskeleton and the extracellular matrix. Deletions, duplications, and point mutations at this gene locus may cause Duchenne muscular dystrophy (DMD), Becker muscular dystrophy (BMD), or cardiomyopathy. Alternative promoter usage and alternative splicing result in numerous distinct transcript variants and protein isoforms for this gene. [provided by RefSeq, Dec 2016]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.72).
• BP6: Variant X-31119880-G-T is Benign according to our data. Variant chrX-31119880-G-T is described in ClinVar as [Likely_benign]. Clinvar id is 368203.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chrX-31119880-G-T is described in Lovd as [Benign].
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.0947 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DMD	NM_004006.3	c.*2039C>A		3_prime_UTR_variant	79/79	ENST00000357033.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DMD	ENST00000357033.9	c.*2039C>A		3_prime_UTR_variant	79/79	1	NM_004006.3	P4

Frequencies

GnomAD3 genomes AF: 0.00641 AC: 714 AN: 111429 Hom.: 16 Cov.: 23 AF XY: 0.00903 AC XY: 304 AN XY: 33681

Gnomad AFR AF: 0.000848

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000863

Gnomad ASJ AF: 0.000379

Gnomad EAS AF: 0.0938

Gnomad SAS AF: 0.106

Gnomad FIN AF: 0.00685

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000226

Gnomad OTH AF: 0.00465

GnomAD4 exome AF: 0.00340 AC: 1 AN: 294 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 122

Gnomad4 FIN exome AF: 0.00345

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00649 AC: 724 AN: 111482 Hom.: 21 Cov.: 23 AF XY: 0.00907 AC XY: 306 AN XY: 33744

Gnomad4 AFR AF: 0.000846

Gnomad4 AMR AF: 0.000862

Gnomad4 ASJ AF: 0.000379

Gnomad4 EAS AF: 0.0936

Gnomad4 SAS AF: 0.105

Gnomad4 FIN AF: 0.00685

Gnomad4 NFE AF: 0.000226

Gnomad4 OTH AF: 0.0144

Alfa AF: 0.000356 Hom.: 3

Bravo AF: 0.00546

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Dilated cardiomyopathy 3B Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 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 determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.72
Cadd	Benign	1.4
Dann	Benign	0.94

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

Other links and lift over

dbSNP: rs72466523; hg19: chrX-31137997;