NM_080701.4:c.446C>G

Variant names:

• chrX-153444985-G-C
• rs781837494
• NM_080701.4:c.446C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_080701.4(TREX2):​c.446C>G​(p.Pro149Arg) variant causes a missense 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. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P149L) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 25)
• Consequence: TREX2 NM_080701.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.250
• Publications: 0 publications found

Genes affected

TREX2 (HGNC:12270): (three prime repair exonuclease 2) This gene encodes a nuclear protein with 3' to 5' exonuclease activity. The encoded protein participates in double-stranded DNA break repair, and may interact with DNA polymerase delta. [provided by RefSeq, Nov 2012]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17459312).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_080701.4. 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
	TREX2	NM_080701.4	MANE Select	c.446C>G	p.Pro149Arg	missense	Exon 2 of 2	NP_542432.2	Q9BQ50-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TREX2	ENST00000370231.3	TSL:5 MANE Select	c.446C>G	p.Pro149Arg	missense	Exon 2 of 2	ENSP00000359251.2	Q9BQ50-2
	TREX2	ENST00000334497.7	TSL:1	c.575C>G	p.Pro192Arg	missense	Exon 11 of 11	ENSP00000334993.2	Q9BQ50-1
	TREX2	ENST00000370232.4	TSL:1	c.575C>G	p.Pro192Arg	missense	Exon 11 of 11	ENSP00000359252.1	Q9BQ50-1

Frequencies

GnomAD3 genomes Cov.: 25

GnomAD2 exomes AF: 0.00 AC: 0 AN: 115100 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 25

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.49
CADD	Benign	12
DANN	Uncertain	0.99
DEOGEN2	Benign	0.16	T
FATHMM_MKL	Benign	0.35	N
LIST_S2	Benign	0.51	T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.17	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.66	N
PhyloP100		0.25
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-1.6	N
REVEL	Benign	0.16
Sift	Benign	0.46	T
Sift4G	Benign	0.52	T
Polyphen		0.99	D
Vest4		0.43
MutPred		0.40		Gain of MoRF binding (P = 0.0023)
MVP		0.17
MPC		0.029
ClinPred		0.39	T
GERP RS		5.0
Varity_R		0.14
gMVP		0.41
Mutation Taster		=89/11	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: rs781837494; hg19: chrX-152710443;