rs892121336

Variant names:

• chrX-31968489-C-A
• rs892121336
• NM_004006.3:c.6464G>T

Your query was ambiguous. Multiple possible variants found:

• chrX-31968489-C-A
• chrX-31968489-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_004006.3(DMD):​c.6464G>T​(p.Arg2155Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000912 in 1,097,058 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 13/19 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. R2155Q) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 24)
  • Exomes 𝑓: 9.1e-7 (0 hom. 1 hem.)
• Consequence: DMD NM_004006.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.18
• Publications: 0 publications found

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]

DMD Gene-Disease associations (from GenCC):

• Becker muscular dystrophy

  Inheritance: XL Classification: DEFINITIVE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet
• dilated cardiomyopathy 3B

  Inheritance: XL Classification: DEFINITIVE Submitted by: Ambry Genetics
• Duchenne and Becker muscular dystrophy

  Inheritance: XL Classification: DEFINITIVE Submitted by: Myriad Women’s Health
• Duchenne muscular dystrophy

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, Orphanet
• progressive muscular dystrophy

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• familial isolated dilated cardiomyopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• non-syndromic X-linked intellectual disability

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
• symptomatic form of muscular dystrophy of Duchenne and Becker in female carriers

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.26592058).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DMD	NM_004006.3	c.6464G>T	p.Arg2155Leu	missense_variant	Exon 45 of 79	ENST00000357033.9	NP_003997.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DMD	ENST00000357033.9	c.6464G>T	p.Arg2155Leu	missense_variant	Exon 45 of 79	1	NM_004006.3	ENSP00000354923.3

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome AF: 9.12e-7 AC: 1 AN: 1097058 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 1 AN XY: 363020

African (AFR) AF: 0.00 AC: 0 AN: 26329

American (AMR) AF: 0.00 AC: 0 AN: 35078

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19331

East Asian (EAS) AF: 0.00 AC: 0 AN: 30174

South Asian (SAS) AF: 0.00 AC: 0 AN: 54118

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40485

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4133

European-Non Finnish (NFE) AF: 0.00000119 AC: 1 AN: 841394

Other (OTH) AF: 0.00 AC: 0 AN: 46016

GnomAD4 genome Cov.: 24

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.54
CADD	Benign	23
DANN	Benign	0.96
DEOGEN2	Benign	0.28	T;.
FATHMM_MKL	Uncertain	0.85	D
LIST_S2	Benign	0.0	.;D
M_CAP	Benign	0.055	D
MetaRNN	Benign	0.27	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.0	.;.
PhyloP100		4.2
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-1.2	N;N
REVEL	Benign	0.14
Sift	Benign	0.49	T;T
Sift4G	Uncertain	0.033	D;D
Vest4		0.45
ClinPred		0.41	T
GERP RS		4.4
gMVP		0.19
Mutation Taster		=94/6	polymorphism

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: rs892121336; hg19: chrX-31986606; COSMIC: COSV100626735;