X-31478191-C-A

Position:

• chrX-31478191-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004006.3(DMD):​c.8852G>T​(p.Arg2951Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000273 in 1,097,643 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. 12/18 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R2951C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0000027 (0 hom. 0 hem.)
• Consequence: DMD NM_004006.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.386

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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22913793).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DMD	NM_004006.3	c.8852G>T	p.Arg2951Leu	missense_variant	59/79	ENST00000357033.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DMD	ENST00000357033.9	c.8852G>T	p.Arg2951Leu	missense_variant	59/79	1	NM_004006.3	P4

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 0.00000273 AC: 3 AN: 1097643 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 363039

Gnomad4 AFR exome AF: 0.0000379

Gnomad4 AMR exome AF: 0.00

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: 0.00000238

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 23

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Benign	-0.059	T
BayesDel_noAF	Benign	-0.32
CADD	Benign	19
DANN	Uncertain	1.0
DEOGEN2	Benign	0.32	.;T;T;T;.;.;T;.;.;T
FATHMM_MKL	Benign	0.69	D
LIST_S2	Uncertain	0.95	D;.;.;.;.;D;.;D;D;.
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.23	T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.89	T
MutationTaster	Benign	1.0	D;D;D;D;D;D;D
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-2.1	N;.;N;D;N;.;N;.;N;N
REVEL	Benign	0.18
Sift	Benign	0.20	T;.;T;T;T;.;D;.;T;T
Sift4G	Benign	0.30	T;T;T;T;T;T;T;T;T;T
Polyphen		0.22, 0.99, 0.060, 0.95	.;.;B;D;B;.;P;.;.;B
Vest4		0.63, 0.62, 0.60, 0.62, 0.62, 0.64, 0.59
MutPred		0.48		.;.;.;.;.;.;.;.;Gain of ubiquitination at K2949 (P = 0.0635);.;
MVP		0.59
MPC		0.040
ClinPred		0.69	D
GERP RS		5.4
gMVP		0.40

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: rs72466567; hg19: chrX-31496308;