chrX-32809553-C-G

Variant names:

• chrX-32809553-C-G
• rs1340365803
• NM_004006.3:c.589G>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_004006.3(DMD):​c.589G>C​(p.Glu197Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000911 in 1,097,969 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. 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. E197K) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 22)
  • Exomes 𝑓: 9.1e-7 (0 hom. 0 hem.)
• Consequence: DMD NM_004006.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.71
• 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: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics, G2P
• 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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004006.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DMD	NM_004006.3	MANE Select	c.589G>C	p.Glu197Gln	missense	Exon 7 of 79	NP_003997.2	P11532-1
	DMD	NM_004009.3		c.577G>C	p.Glu193Gln	missense	Exon 7 of 79	NP_004000.1	P11532
	DMD	NM_000109.4		c.565G>C	p.Glu189Gln	missense	Exon 7 of 79	NP_000100.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DMD	ENST00000357033.9	TSL:1 MANE Select	c.589G>C	p.Glu197Gln	missense	Exon 7 of 79	ENSP00000354923.3	P11532-1
	DMD	ENST00000288447.9	TSL:1	c.565G>C	p.Glu189Gln	missense	Exon 7 of 18	ENSP00000288447.4	Q4G0X0
	DMD	ENST00000447523.1	TSL:1	c.246+13742G>C		intron	N/A	ENSP00000395904.1	Q14174

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome AF: 9.11e-7 AC: 1 AN: 1097969 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 363351

African (AFR) AF: 0.00 AC: 0 AN: 26402

American (AMR) AF: 0.00 AC: 0 AN: 35195

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19378

East Asian (EAS) AF: 0.00 AC: 0 AN: 30191

South Asian (SAS) AF: 0.00 AC: 0 AN: 54138

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40494

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4134

European-Non Finnish (NFE) AF: 0.00000119 AC: 1 AN: 841954

Other (OTH) AF: 0.00 AC: 0 AN: 46083

GnomAD4 genome Cov.: 22

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.040
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.59	D
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.88	D
M_CAP	Uncertain	0.087	D
MetaRNN	Uncertain	0.45	T
MetaSVM	Uncertain	0.36	D
PhyloP100		7.7
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-1.5	N
REVEL	Uncertain	0.38
Sift	Uncertain	0.010	D
Sift4G	Uncertain	0.023	D
Polyphen		0.0020	B
Vest4		0.44
MutPred		0.49		Loss of catalytic residue at N201 (P = 0.2245)
MVP		0.90
MPC		0.025
ClinPred		0.83	D
GERP RS		4.3
gMVP		0.45
Mutation Taster		=77/23	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: rs1340365803; hg19: chrX-32827670;