6-56552484-C-A

Variant names:

• chr6-56552484-C-A
• rs4715630
• NM_001374736.1:c.16308G>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001374736.1(DST):​c.16308G>T​(p.Met5436Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,608 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 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 nucleotide change resulting in the same amino acid substitution has been previously reported as Benign in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M5436L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: DST NM_001374736.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.386
• Publications: 41 publications found

Genes affected

DST (HGNC:1090): (dystonin) This gene encodes a member of the plakin protein family of adhesion junction plaque proteins. Multiple alternatively spliced transcript variants encoding distinct isoforms have been found for this gene, but the full-length nature of some variants has not been defined. It has been reported that some isoforms are expressed in neural and muscle tissue, anchoring neural intermediate filaments to the actin cytoskeleton, and some isoforms are expressed in epithelial tissue, anchoring keratin-containing intermediate filaments to hemidesmosomes. Consistent with the expression, mice defective for this gene show skin blistering and neurodegeneration. [provided by RefSeq, Mar 2010]

DST Gene-Disease associations (from GenCC):

• hereditary sensory and autonomic neuropathy type 6

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE, LIMITED Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Orphanet, G2P, Ambry Genetics
• epidermolysis bullosa simplex 3, localized or generalized intermediate, with BP230 deficiency

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Ambry Genetics, Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.035747975).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001374736.1. 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
	DST	NM_001374736.1	MANE Select	c.16308G>T	p.Met5436Ile	missense	Exon 61 of 104	NP_001361665.1	A0A7P0T890
	DST	NM_001374734.1		c.16335G>T	p.Met5445Ile	missense	Exon 61 of 103	NP_001361663.1
	DST	NM_001374722.1		c.16308G>T	p.Met5436Ile	missense	Exon 61 of 103	NP_001361651.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DST	ENST00000680361.1	MANE Select	c.16308G>T	p.Met5436Ile	missense	Exon 61 of 104	ENSP00000505098.1	A0A7P0T890
	DST	ENST00000244364.10	TSL:1	c.8439G>T	p.Met2813Ile	missense	Exon 42 of 84	ENSP00000244364.6	Q03001-8
	DST	ENST00000361203.7	TSL:5	c.15675G>T	p.Met5225Ile	missense	Exon 57 of 98	ENSP00000354508.3	F8W9J4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000402 AC: 1 AN: 248588 AF XY: 0.00

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: 0.00000889

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461608 Hom.: 0 Cov.: 65 AF XY: 0.00000138 AC XY: 1 AN XY: 727084

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44712

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53376

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

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111822

Other (OTH) AF: 0.00 AC: 0 AN: 60368

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.68
CADD	Benign	0.45
DANN	Benign	0.85
DEOGEN2	Benign	0.0091	T
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.089	N
LIST_S2	Benign	0.25	T
M_CAP	Benign	0.0033	T
MetaRNN	Benign	0.036	T
MetaSVM	Benign	-1.0	T
PhyloP100		-0.39
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-0.040	N
REVEL	Benign	0.041
Sift	Benign	0.50	T
Polyphen		0.0	B
Vest4		0.13
MVP		0.17
MPC		0.13
ClinPred		0.036	T
GERP RS		-8.7
gMVP		0.12
Mutation Taster		=99/1	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: rs4715630; hg19: chr6-56417282;