rs755919767

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PP3_Strong

The NM_033629.6(TREX1):c.218C>T(p.Pro73Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000155 in 1,613,282 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. P73P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

TREX1
NM_033629.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:6

Conservation

PhyloP100: 4.97

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 Uncertain_significance. Variant got 4 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.971

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
TREX1	NM_033629.6 linkuse as main transcript	c.218C>T	p.Pro73Leu	missense_variant	2/2	ENST00000625293.3
ATRIP	NM_130384.3 linkuse as main transcript	c.*1319C>T		3_prime_UTR_variant	13/13	ENST00000320211.10
ATRIP-TREX1	NR_153405.1 linkuse as main transcript	n.3527C>T		non_coding_transcript_exon_variant	15/15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TREX1	ENST00000625293.3 linkuse as main transcript	c.218C>T	p.Pro73Leu	missense_variant	2/2		NM_033629.6	P1	Q9NSU2-3
ATRIP	ENST00000320211.10 linkuse as main transcript	c.*1319C>T		3_prime_UTR_variant	13/13	1	NM_130384.3	P1	Q8WXE1-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

250524

Hom.:

AF XY:

0.0000295

AC XY:

AN XY:

135524

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000131

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000157

AC:

AN:

1461098

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

726896

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000812

Gnomad4 FIN exome

AF:

0.0000190

Gnomad4 NFE exome

AF:

0.0000108

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152184

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74356

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000660

Hom.:

Bravo

AF:

0.0000189

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2Uncertain:6

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Pathogenic:1Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Apr 09, 2021	In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Feb 01, 2019	- -
Pathogenic, no assertion criteria provided	clinical testing	Laboratory of Molecular Genetics (Pr. Bezieau's lab), CHU de Nantes	Sep 26, 2016	- -

Aicardi-Goutieres syndrome 1

Pathogenic:1Uncertain:2

Uncertain significance, no assertion criteria provided	clinical testing	Myelin Disorders Clinic-Children's Medical Center/Medical Genetics Lab-Tarbiat Modares University, Children's Medical Center, Pediatrics Center of Excellence,	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Genomic Research Center, Shahid Beheshti University of Medical Sciences	Dec 18, 2017	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Johns Hopkins Genomics, Johns Hopkins University	Jun 18, 2019	This TREX1 variant (rs755919767) is rare (<0.1%) in large population datasets (gnomAD: 6/250524 total alleles; 0.0024%; no homozygotes) and has not been reported in the literature, to our knowledge. There are conflicting interpretations of the pathogenicity of this variant in ClinVar. Two submitters classified it as a variant of uncertain clinical significance and one as pathogenic. Two bioinformatic tools queried predict that this substitution would be probably damaging/deleterious, and the proline residue at this position is evolutionarily conserved in mammals. This variant is considered to be likely pathogenic. -

Systemic lupus erythematosus;C0024145: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

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

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

Invitae

Jan 14, 2024

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 73 of the TREX1 protein (p.Pro73Leu). This variant is present in population databases (rs755919767, gnomAD 0.01%). This missense change has been observed in individual(s) with increased CSF interferon alpha (PMID: 34440436). ClinVar contains an entry for this variant (Variation ID: 522920). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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

Pathogenic

0.65

BayesDel_addAF

Pathogenic

0.37

BayesDel_noAF

Pathogenic

0.53

Cadd

Pathogenic

Dann

Uncertain

1.0

Eigen

Uncertain

0.59

Eigen_PC

Uncertain

0.48

FATHMM_MKL

Benign

0.60

LIST_S2

Benign

0.74

T;T

M_CAP

Pathogenic

0.67

MetaRNN

Pathogenic

0.97

D;D

MetaSVM

Pathogenic

1.1

MutationTaster

Benign

1.0

D;D;D;D;D;D

PrimateAI

Uncertain

0.61

Vest4

0.80

MVP

0.96

ClinPred

1.0

GERP RS

5.0

Varity_R

0.72

gMVP

0.69

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