chr6-56459141-T-G

Variant names:

• chr6-56459141-T-G
• rs771266784
• NM_001374736.1:c.23321A>C

Variant summary

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

The NM_001374736.1(DST):​c.23321A>C​(p.Asp7774Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000171 in 1,461,704 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000017 (0 hom.)
• Consequence: DST NM_001374736.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.02
• Publications: 0 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: Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics, Orphanet, G2P
• epidermolysis bullosa simplex 3, localized or generalized intermediate, with BP230 deficiency

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

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=0.4123208).

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.23321A>C	p.Asp7774Ala	missense	Exon 104 of 104	NP_001361665.1	A0A7P0T890
	DST	NM_001374734.1		c.23276A>C	p.Asp7759Ala	missense	Exon 103 of 103	NP_001361663.1
	DST	NM_001374722.1		c.23249A>C	p.Asp7750Ala	missense	Exon 103 of 103	NP_001361651.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DST	ENST00000680361.1	MANE Select	c.23321A>C	p.Asp7774Ala	missense	Exon 104 of 104	ENSP00000505098.1	A0A7P0T890
	DST	ENST00000244364.10	TSL:1	c.15380A>C	p.Asp5127Ala	missense	Exon 84 of 84	ENSP00000244364.6	Q03001-8
	DST	ENST00000523292.5	TSL:1	c.641A>C	p.Asp214Ala	missense	Exon 5 of 5	ENSP00000431020.1	H0YC65

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000401 AC: 1 AN: 249276 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: 0.00000885

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000171 AC: 25 AN: 1461704 Hom.: 0 Cov.: 31 AF XY: 0.0000179 AC XY: 13 AN XY: 727134

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: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53400

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

European-Non Finnish (NFE) AF: 0.0000225 AC: 25 AN: 1111868

Other (OTH) AF: 0.00 AC: 0 AN: 60374

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000827 AC: 1

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Hereditary sensory and autonomic neuropathy type 6;C3809470:Epidermolysis bullosa simplex 3, localized or generalized intermediate, with BP230 deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.68
BayesDel_addAF	Uncertain	0.094	D
BayesDel_noAF	Benign	-0.10
CADD	Benign	22
DANN	Uncertain	0.98
DEOGEN2	Benign	0.19	T
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.047	D
MetaRNN	Benign	0.41	T
MetaSVM	Benign	-0.43	T
PhyloP100		8.0
PrimateAI	Uncertain	0.73	T
PROVEAN	Pathogenic	-7.1	D
REVEL	Uncertain	0.32
Sift	Uncertain	0.0030	D
Polyphen		0.49	P
Vest4		0.42
MVP		0.59
MPC		1.5
ClinPred		0.98	D
GERP RS		6.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.64
Mutation Taster		=51/49	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: rs771266784; hg19: chr6-56323939;