chrX-32484925-G-T

Position:

• chrX-32484925-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP5 BP4

The NM_004006.3(DMD):​c.2797C>A​(p.Gln933Lys) variant causes a missense change. The variant allele was found at a frequency of 0.000000911 in 1,097,335 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in Lovd as Pathogenic (no stars).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 9.1e-7 (0 hom. 0 hem.)
• Consequence: DMD NM_004006.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.40

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 Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-32484925-G-T is Pathogenic according to our data. Variant chrX-32484925-G-T is described in Lovd as [Pathogenic].
• BP4: Computational evidence support a benign effect (MetaRNN=0.28923935). . Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DMD	NM_004006.3	c.2797C>A	p.Gln933Lys	missense_variant	21/79	ENST00000357033.9	NP_003997.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DMD	ENST00000357033.9	c.2797C>A	p.Gln933Lys	missense_variant	21/79	1	NM_004006.3	ENSP00000354923	P4

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD3 exomes AF: 0.0000110 AC: 2 AN: 181493 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 66137

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000734

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 9.11e-7 AC: 1 AN: 1097335 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 362805

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000284

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 23

ExAC AF: 0.0000165 AC: 2

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.091
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.25	.;T;.;.
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.79	T;.;T;T
M_CAP	Benign	0.068	D
MetaRNN	Benign	0.29	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	0.76	D;D
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-1.2	.;N;.;N
REVEL	Benign	0.15
Sift	Benign	0.26	.;T;.;T
Sift4G	Benign	0.30	T;T;T;T
Polyphen		0.96	.;D;.;.
Vest4		0.33
MutPred		0.45		.;.;Gain of ubiquitination at Q933 (P = 0.0289);Gain of ubiquitination at Q933 (P = 0.0289);
MVP		0.68
MPC		0.049
ClinPred		0.50	D
GERP RS		5.2
gMVP		0.26

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: rs756949497; hg19: chrX-32503042;