rs128626236

chrX-32816495-G-T

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PS1_Moderate PM1 PM2 PP3_Strong PP5

The NM_004006.3(DMD):c.503C>A(p.Ala168Asp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another nucleotide change resulting in same amino acid change has been previously reported as Likely pathogenicin UniProt.

• Frequency: Genomes: not found (cov: 22)
• Consequence: DMD NM_004006.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 10.0

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 Pathogenic. Variant got 11 ACMG points.

• PS1: Transcript NM_004006.3 (DMD) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in UniProt
• PM1: In a helix (size 9) in uniprot entity DMD_HUMAN there are 4 pathogenic changes around while only 1 benign (80%) in NM_004006.3
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.992
• PP5: Variant X-32816495-G-T is Pathogenic according to our data. Variant chrX-32816495-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 11230.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chrX-32816495-G-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DMD	NM_004006.3	c.503C>A	p.Ala168Asp	missense_variant	6/79	ENST00000357033.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DMD	ENST00000357033.9	c.503C>A	p.Ala168Asp	missense_variant	6/79	1	NM_004006.3	P4

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 22

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Becker muscular dystrophy Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 1994

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.72	D
BayesDel_noAF	Pathogenic	0.80
Cadd	Pathogenic	30
Dann	Uncertain	1.0
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.97	D;.;D;D;D
M_CAP	Pathogenic	0.79	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationTaster	Benign	1.0	A;A;A
PrimateAI	Uncertain	0.73	T
Sift4G	Uncertain	0.030	D;D;D;D;D
Polyphen		1.0	.;D;.;.;D
Vest4		0.98
MutPred		0.93		.;.;Gain of disorder (P = 0.187);Gain of disorder (P = 0.187);.;
MVP		1.0
MPC		0.13
ClinPred		1.0	D
GERP RS		5.5
gMVP		0.98

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs128626236; hg19: chrX-32834612;