rs148833270

Positions:

chr3-48467524-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_033629.6(TREX1):c.869C>T(p.Pro290Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000409 in 1,613,578 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000042 ( 0 hom. )

Consequence

TREX1
NM_033629.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.10

Variant links:

Genes affected

TREX1 (HGNC:12269): (three prime repair exonuclease 1) This gene encodes a nuclear protein with 3' exonuclease activity. The encoded protein may play a role in DNA repair and serve as a proofreading function for DNA polymerase. Mutations in this gene result in Aicardi-Goutieres syndrome, chilblain lupus, Cree encephalitis, and other diseases of the immune system. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2012]

TREX1 links:

ATRIP (HGNC:33499): (ATR interacting protein) This gene encodes an essential component of the DNA damage checkpoint. The encoded protein binds to single-stranded DNA coated with replication protein A. The protein also interacts with the ataxia telangiectasia and Rad3 related protein kinase, resulting in its accumulation at intranuclear foci induced by DNA damage. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2012]

ATRIP links:

ATRIP-TREX1 (HGNC:):

ATRIP-TREX1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.12725055).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TREX1	NM_033629.6 linkuse as main transcript	c.869C>T	p.Pro290Leu	missense_variant	2/2	ENST00000625293.3	NP_338599.1	Q9NSU2-3
ATRIP	NM_130384.3 linkuse as main transcript	c.*1970C>T		3_prime_UTR_variant	13/13	ENST00000320211.10	NP_569055.1	Q8WXE1-1A0A024R2U4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TREX1	ENST00000625293.3 linkuse as main transcript	c.869C>T	p.Pro290Leu	missense_variant	2/2	6	NM_033629.6	ENSP00000486676.2		Q9NSU2-3
ATRIP	ENST00000320211.10 linkuse as main transcript	c.*1970C>T		3_prime_UTR_variant	13/13	1	NM_130384.3	ENSP00000323099.3		Q8WXE1-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000638

AC:

AN:

250958

Hom.:

AF XY:

0.0000810

AC XY:

AN XY:

135738

show subpopulations

Gnomad AFR exome

AF:

0.0000617

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000196

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000794

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000424

AC:

AN:

1461384

Hom.:

Cov.:

AF XY:

0.0000481

AC XY:

AN XY:

727014

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000186

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000405

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152194

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74360

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000302

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000494

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Apr 04, 2024

Variant summary: TREX1 c.869C>T (p.Pro290Leu) results in a non-conservative amino acid change in the encoded protein sequence. Two of four in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 6.4e-05 in 250958 control chromosomes (gnomAD). This frequency is not significantly higher than estimated for a pathogenic variant in TREX1 causing Aicardi-Goutieres Syndrome 1-AR (6.4e-05 vs 0.011), allowing no conclusion about variant significance. c.869C>T has been reported in the literature in an individuals affected with Systemic lupus erythematosus (Lee-Kirsch_2007). This report does not provide unequivocal conclusions about association of the variant with Aicardi-Goutieres Syndrome 1-AR. Publications report experimental evidence evaluating an impact on protein function, finding no effect of the variant on exonuclease activity or localization (Orebaugh_2013, Mohr_2021). The following publications have been ascertained in the context of this evaluation (PMID: 17660818, 23979357, 33476576). ClinVar contains an entry for this variant (Variation ID: 576299). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Chilblain lupus 1;C0796126:Aicardi-Goutieres syndrome 1;C1860518:Retinal vasculopathy with cerebral leukoencephalopathy and systemic manifestations

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 11, 2023

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 290 of the TREX1 protein (p.Pro290Leu). This variant is present in population databases (rs148833270, gnomAD 0.02%). This missense change has been observed in individual(s) with systemic lupus erythermatosus (PMID: 17660818). ClinVar contains an entry for this variant (Variation ID: 576299). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Not Available". The leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.069

BayesDel_noAF

Uncertain

-0.060

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.033

T;.;.;T;T;T

Eigen

Benign

-0.23

Eigen_PC

Benign

-0.16

FATHMM_MKL

Benign

0.21

LIST_S2

Benign

0.74

.;T;T;.;.;T

M_CAP

Benign

0.034

MetaRNN

Benign

0.13

T;T;T;T;T;T

MetaSVM

Benign

-0.82

PrimateAI

Benign

0.42

PROVEAN

Benign

-0.52

N;.;N;.;.;N

REVEL

Benign

0.23

Sift

Pathogenic

0.0

D;.;D;.;.;D

Sift4G

Pathogenic

0.0

D;.;D;.;.;D

Vest4

0.66

MVP

0.78

ClinPred

0.22

GERP RS

3.9

Varity_R

0.14

gMVP

0.56

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over