chr2-162073469-A-C

Variant names:

• chr2-162073469-A-C
• rs17574
• NM_001935.4:c.24T>G

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_001935.4(DPP4):​c.24T>G​(p.Leu8Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DPP4 NM_001935.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.179
• Publications: 0 publications found

Genes affected

DPP4 (HGNC:3009): (dipeptidyl peptidase 4) The DPP4 gene encodes dipeptidyl peptidase 4, which is identical to adenosine deaminase complexing protein-2, and to the T-cell activation antigen CD26. It is an intrinsic type II transmembrane glycoprotein and a serine exopeptidase that cleaves X-proline dipeptides from the N-terminus of polypeptides. Dipeptidyl peptidase 4 is highly involved in glucose and insulin metabolism, as well as in immune regulation. This protein was shown to be a functional receptor for Middle East respiratory syndrome coronavirus (MERS-CoV), and protein modeling suggests that it may play a similar role with SARS-CoV-2, the virus responsible for COVID-19. [provided by RefSeq, Apr 2020]

DPP4-DT (HGNC:40191): (DPP4 divergent transcript)

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.33).
• BP7: Synonymous conserved (PhyloP=0.179 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001935.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DPP4	NM_001935.4	MANE Select	c.24T>G	p.Leu8Leu	synonymous	Exon 2 of 26	NP_001926.2
	DPP4	NM_001379604.1		c.24T>G	p.Leu8Leu	synonymous	Exon 2 of 26	NP_001366533.1
	DPP4	NM_001379605.1		c.24T>G	p.Leu8Leu	synonymous	Exon 2 of 26	NP_001366534.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DPP4	ENST00000360534.8	TSL:1 MANE Select	c.24T>G	p.Leu8Leu	synonymous	Exon 2 of 26	ENSP00000353731.3
	DPP4	ENST00000434918.6	TSL:1	n.24T>G		non_coding_transcript_exon	Exon 2 of 27	ENSP00000402259.2
	DPP4	ENST00000461836.6	TSL:1	n.505T>G		non_coding_transcript_exon	Exon 1 of 10

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 39

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.33
CADD	Benign	17
DANN	Benign	0.83
PhyloP100		0.18
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.8
Mutation Taster		=100/0	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: rs17574; hg19: chr2-162929979;