Genetic Variant DACH1:p.Gly78_Gly81dup (chr13-71866526-T-TGCCGCCGCCGCC) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP3BS2

The NM_080759.6(DACH1):c.232_243dupGGCGGCGGCGGC(p.Gly78_Gly81dup) variant causes a conservative inframe insertion change involving the alteration of a non-conserved nucleotide. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 6)

Exomes 𝑓: 0.000062 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

DACH1
NM_080759.6 conservative_inframe_insertion

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.32

Publications

2 publications found

Variant links:

Genes affected

DACH1 (HGNC:2663): (dachshund family transcription factor 1) This gene encodes a chromatin-associated protein that associates with other DNA-binding transcription factors to regulate gene expression and cell fate determination during development. The protein contains a Ski domain that is highly conserved from Drosophila to human. Expression of this gene is lost in some forms of metastatic cancer, and is correlated with poor prognosis. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2009]

DACH1 links:

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ACMG classification

Classification was made for transcript

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

BP3

Nonframeshift variant in repetitive region in NM_080759.6

BS2

High AC in GnomAd4 at 18 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DACH1	NM_080759.6 link	c.232_243dupGGCGGCGGCGGC	p.Gly78_Gly81dup	conservative_inframe_insertion	Exon 1 of 11	ENST00000613252.5	NP_542937.3	Q9UI36-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
DACH1	ENST00000613252.5 link	c.232_243dupGGCGGCGGCGGC	p.Gly78_Gly81dup	conservative_inframe_insertion	Exon 1 of 11	1	NM_080759.6	ENSP00000482245.1	Q9UI36-2
DACH1	ENST00000619232.2 link	c.232_243dupGGCGGCGGCGGC	p.Gly78_Gly81dup	conservative_inframe_insertion	Exon 1 of 12	5		ENSP00000482797.1	Q9UI36-1
DACH1	ENST00000706274.1 link	c.-228_-217dupGGCGGCGGCGGC		upstream_gene_variant				ENSP00000516320.1	A0A994J7Q8

Frequencies

GnomAD3 genomes

AF:

0.000125

AC:

AN:

143526

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000180

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000206

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000211

Gnomad SAS

AF:

0.000221

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000918

Gnomad OTH

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.0000624

AC:

AN:

1090322

Hom.:

Cov.:

AF XY:

0.0000556

AC XY:

AN XY:

521362

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.0000470

AC:

AN:

21286

American (AMR)

AF:

0.00

AC:

AN:

8096

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

13908

East Asian (EAS)

AF:

0.000121

AC:

AN:

24716

South Asian (SAS)

AF:

0.000246

AC:

AN:

20340

European-Finnish (FIN)

AF:

0.00

AC:

AN:

28690

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2960

European-Non Finnish (NFE)

AF:

0.0000593

AC:

AN:

927196

Other (OTH)

AF:

0.0000927

AC:

AN:

43130

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.395

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000125

AC:

AN:

143618

Hom.:

Cov.:

AF XY:

0.000172

AC XY:

AN XY:

69848

show subpopulations

African (AFR)

AF:

0.000179

AC:

AN:

39080

American (AMR)

AF:

0.000206

AC:

AN:

14566

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3388

East Asian (EAS)

AF:

0.000212

AC:

AN:

4718

South Asian (SAS)

AF:

0.000221

AC:

AN:

4528

European-Finnish (FIN)

AF:

0.00

AC:

AN:

8882

Middle Eastern (MID)

AF:

0.00

AC:

AN:

280

European-Non Finnish (NFE)

AF:

0.0000918

AC:

AN:

65334

Other (OTH)

AF:

0.00

AC:

AN:

1962

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.522

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

1.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over