NM_139159.5:c.2178G>A

Variant names:

• chr19-4684663-C-T
• NM_139159.5:c.2178G>A

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM2 PP3_Strong PP5_Moderate

The NM_139159.5(DPP9):​c.2178G>A​(p.Met726Ile) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: DPP9 NM_139159.5 missense, splice_region
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.76

Genes affected

DPP9 (HGNC:18648): (dipeptidyl peptidase 9) This gene encodes a protein that is a member of the S9B family in clan SC of the serine proteases. The protein has been shown to have post-proline dipeptidyl aminopeptidase activity, cleaving Xaa-Pro dipeptides from the N-termini of proteins. Although the activity of this protein is similar to that of dipeptidyl peptidase 4 (DPP4), it does not appear to be membrane bound. In general, dipeptidyl peptidases appear to be involved in the regulation of the activity of their substrates and have been linked to a variety of diseases including type 2 diabetes, obesity and cancer. Several transcript variants of this gene have been described but not fully characterized. [provided by RefSeq, Jul 2008]

DPP9-AS1 (HGNC:50706): (DPP9 antisense RNA 1)

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. Scorers claiming Uncertain: max_spliceai. No scorers claiming Benign.
• PP5: Variant 19-4684663-C-T is Pathogenic according to our data. Variant chr19-4684663-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 3256926.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DPP9	NM_139159.5	c.2178G>A	p.Met726Ile	missense_variant, splice_region_variant	Exon 18 of 22	ENST00000262960.14	NP_631898.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DPP9	ENST00000262960.14	c.2178G>A	p.Met726Ile	missense_variant, splice_region_variant	Exon 18 of 22	1	NM_139159.5	ENSP00000262960.8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Susceptibility to severe COVID-19 Pathogenic:1

Jul 22, 2024

Molecular Medicine Center, Medical University of Sofia

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

Novel (unreported in gnomAD or dbSNP until April 2024) variant found in severely infected COVID-19 Bulgarian patients in a research study. Variant is classified as likely pathogenic according to the ACMG criteria: PM1,PM2,PP3,PP4. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Uncertain	0.092	D
BayesDel_noAF	Benign	-0.11
CADD	Pathogenic	35
DANN	Uncertain	1.0
DEOGEN2	Benign	0.27	.;.;T
Eigen	Uncertain	0.34
Eigen_PC	Uncertain	0.38
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.94	D;D;D
M_CAP	Benign	0.012	T
MetaRNN	Uncertain	0.74	D;D;D
MetaSVM	Benign	-0.81	T
MutationAssessor	Benign	1.7	L;.;L
PrimateAI	Uncertain	0.73	T
PROVEAN	Uncertain	-3.5	.;D;.
REVEL	Uncertain	0.29
Sift	Uncertain	0.0040	.;D;.
Sift4G	Uncertain	0.029	D;D;D
Vest4		0.85
MutPred		0.71		.;Loss of ubiquitination at K723 (P = 0.0573);.;
MVP		0.41
MPC		0.79
ClinPred		0.95	D
GERP RS		4.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.73
gMVP		0.89

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.99
SpliceAI score (max)		0.44		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.44		Position offset: 28

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-4684675;