NM_025265.4:c.917delT

Variant names:

• chr3-12516613-CT-C
• NM_025265.4:c.917delT

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_025265.4(TSEN2):​c.917delT​(p.Phe306SerfsTer9) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 31)
• Consequence: TSEN2 NM_025265.4 frameshift
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1 U:1
• Conservation: PhyloP100: 5.51
• Publications: 0 publications found

Genes affected

TSEN2 (HGNC:28422): (tRNA splicing endonuclease subunit 2) This gene encodes one of the subunits of the tRNA splicing endonuclease. This endonuclease catalyzes the first step in RNA splicing which is the removal of introns. Mutations in this gene have been associated with pontocerebellar hypoplasia type 2. A pseudogene has been identified on chromosome 4. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Feb 2009]

MKRN2OS (HGNC:40375): (MKRN2 opposite strand)

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_025265.4. 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
	TSEN2	NM_025265.4	MANE Select	c.917delT	p.Phe306SerfsTer9	frameshift	Exon 7 of 12	NP_079541.1	Q8NCE0-1
	TSEN2	NM_001321278.2		c.917delT	p.Phe306SerfsTer9	frameshift	Exon 7 of 12	NP_001308207.1	C9J7Z4
	TSEN2	NM_001145392.2		c.917delT	p.Phe306SerfsTer9	frameshift	Exon 7 of 12	NP_001138864.1	Q8NCE0-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TSEN2	ENST00000284995.11	TSL:1 MANE Select	c.917delT	p.Phe306SerfsTer9	frameshift	Exon 7 of 12	ENSP00000284995.6	Q8NCE0-1
	TSEN2	ENST00000402228.7	TSL:1	c.917delT	p.Phe306SerfsTer9	frameshift	Exon 7 of 12	ENSP00000385976.3	Q8NCE0-1
	TSEN2	ENST00000454502.6	TSL:1	c.740delT	p.Phe247SerfsTer9	frameshift	Exon 8 of 13	ENSP00000392029.2	Q8NCE0-4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)
1	-	-	Pontoneocerebellar hypoplasia (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		5.5

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

hg19: chr3-12558112;