18-34858355-G-A

Variant names:

• chr18-34858355-G-A
• rs746736894
• NM_001386795.1:c.1603G>A

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4 BS2

The NM_001386788.1(DTNA):​c.1603G>A​(p.Ala535Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000752 in 1,461,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. A535S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000075 (0 hom.)
• Consequence: DTNA NM_001386788.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 8.11
• Publications: 0 publications found

Genes affected

DTNA (HGNC:3057): (dystrobrevin alpha) The protein encoded by this gene belongs to the dystrobrevin subfamily of the dystrophin family. This protein is a component of the dystrophin-associated protein complex (DPC), which consists of dystrophin and several integral and peripheral membrane proteins, including dystroglycans, sarcoglycans, syntrophins and alpha- and beta-dystrobrevin. The DPC localizes to the sarcolemma and its disruption is associated with various forms of muscular dystrophy. Mutations in this gene are associated with left ventricular noncompaction with congenital heart defects. Multiple alternatively spliced transcript variants encoding different isoforms have been identified for this gene. [provided by RefSeq, Jul 2008]

DTNA Gene-Disease associations (from GenCC):

• dilated cardiomyopathy

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• left ventricular noncompaction 1

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• Meniere disease

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• congenital heart disease

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.2971955).
• BS2: High AC in GnomAdExome4 at 11 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001386788.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DTNA	NM_001386795.1	MANE Select	c.1603G>A	p.Ala535Thr	missense	Exon 16 of 23	NP_001373724.1
	DTNA	NM_001386788.1		c.1603G>A	p.Ala535Thr	missense	Exon 16 of 23	NP_001373717.1
	DTNA	NM_001390.5		c.1522G>A	p.Ala508Thr	missense	Exon 15 of 22	NP_001381.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DTNA	ENST00000444659.6	TSL:5 MANE Select	c.1603G>A	p.Ala535Thr	missense	Exon 16 of 23	ENSP00000405819.2
	DTNA	ENST00000598334.5	TSL:1	c.1342G>A	p.Ala448Thr	missense	Exon 14 of 20	ENSP00000470152.1
	DTNA	ENST00000399121.9	TSL:1	c.1342G>A	p.Ala448Thr	missense	Exon 14 of 22	ENSP00000382072.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000799 AC: 2 AN: 250204 AF XY: 0.0000148

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000178

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000752 AC: 11 AN: 1461880 Hom.: 0 Cov.: 32 AF XY: 0.0000110 AC XY: 8 AN XY: 727244

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000989 AC: 11 AN: 1112004

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.073	T
BayesDel_noAF	Benign	-0.33
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.32	T
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.96	D
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.30	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.5	L
PhyloP100		8.1
PrimateAI	Uncertain	0.76	T
PROVEAN	Benign	-2.1	N
REVEL	Benign	0.16
Sift	Uncertain	0.0080	D
Sift4G	Uncertain	0.021	D
Polyphen		0.70	P
Vest4		0.44
MutPred		0.051		Gain of phosphorylation at A508 (P = 0.0235)
MVP		0.42
MPC		0.42
ClinPred		0.83	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.18
gMVP		0.52
Mutation Taster		=59/41	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: rs746736894; hg19: chr18-32438319;