NM_130797.4:c.-89_-88delTT

Variant names:

• chr7-154052720-CTT-C
• rs571183490
• NM_130797.4:c.-89_-88delTT

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2

The NM_130797.4(DPP6):​c.-89_-88delTT variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.00025 (0 hom., cov: 6)
  • Exomes 𝑓: 0.014 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: DPP6 NM_130797.4 5_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0410
• Publications: 2 publications found

Genes affected

DPP6 (HGNC:3010): (dipeptidyl peptidase like 6) This gene encodes a single-pass type II membrane protein that is a member of the peptidase S9B family of serine proteases. This protein has no detectable protease activity, most likely due to the absence of the conserved serine residue normally present in the catalytic domain of serine proteases. However, it does bind specific voltage-gated potassium channels and alters their expression and biophysical properties. Variations in this gene may be associated with susceptibility to amyotrophic lateral sclerosis and with idiopathic ventricular fibrillation. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2014]

DPP6 Gene-Disease associations (from GenCC):

• autosomal dominant primary microcephaly

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• paroxysmal familial ventricular fibrillation

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• ventricular fibrillation, paroxysmal familial, 2

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• intellectual disability, autosomal dominant 33

  Inheritance: Unknown, AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• complex neurodevelopmental disorder

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ENSG00000203335 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BS2: High AC in GnomAd4 at 36 AD,Unknown gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_130797.4. 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
	DPP6	NM_130797.4	MANE Select	c.-89_-88delTT		5_prime_UTR	Exon 1 of 26	NP_570629.2	P42658-1
	DPP6	NM_001290253.2		c.-89_-88delTT		5_prime_UTR	Exon 1 of 6	NP_001277182.1	Q8IYG9
	DPP6	NM_001364497.2		c.60+303724_60+303725delTT		intron	N/A	NP_001351426.1	A0A994J7K0

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DPP6	ENST00000377770.8	TSL:1 MANE Select	c.-89_-88delTT		5_prime_UTR	Exon 1 of 26	ENSP00000367001.3	P42658-1
	DPP6	ENST00000406326.5	TSL:1	c.-89_-88delTT		5_prime_UTR	Exon 1 of 6	ENSP00000384393.1	Q8IYG9
	DPP6	ENST00000404039.5	TSL:1	c.51+164998_51+164999delTT		intron	N/A	ENSP00000385578.1	E9PF59

Frequencies

GnomAD3 genomes AF: 0.000262 AC: 37 AN: 141458 Hom.: 0 Cov.: 6

Gnomad AFR AF: 0.0000775

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000279

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00214

Gnomad SAS AF: 0.000225

Gnomad FIN AF: 0.000128

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000277

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.0140 AC: 13476 AN: 959726 Hom.: 0 AF XY: 0.0157 AC XY: 7324 AN XY: 465692

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

African (AFR) AF: 0.0135 AC: 231 AN: 17170

American (AMR) AF: 0.0570 AC: 779 AN: 13674

Ashkenazi Jewish (ASJ) AF: 0.0232 AC: 255 AN: 10992

East Asian (EAS) AF: 0.0605 AC: 606 AN: 10014

South Asian (SAS) AF: 0.0419 AC: 2222 AN: 53038

European-Finnish (FIN) AF: 0.0404 AC: 432 AN: 10688

Middle Eastern (MID) AF: 0.0133 AC: 34 AN: 2564

European-Non Finnish (NFE) AF: 0.0103 AC: 8342 AN: 807950

Other (OTH) AF: 0.0171 AC: 575 AN: 33636

⚠️ 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.

GnomAD4 genome AF: 0.000255 AC: 36 AN: 141446 Hom.: 0 Cov.: 6 AF XY: 0.000366 AC XY: 25 AN XY: 68380

African (AFR) AF: 0.0000774 AC: 3 AN: 38740

American (AMR) AF: 0.000279 AC: 4 AN: 14358

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3370

East Asian (EAS) AF: 0.00215 AC: 10 AN: 4650

South Asian (SAS) AF: 0.00 AC: 0 AN: 4424

European-Finnish (FIN) AF: 0.000128 AC: 1 AN: 7822

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 264

European-Non Finnish (NFE) AF: 0.000277 AC: 18 AN: 64972

Other (OTH) AF: 0.00 AC: 0 AN: 1958

Alfa AF: 0.00 Hom.: 121

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.041
Mutation Taster		=296/4	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: rs571183490; hg19: chr7-153749805;