ClinVar Miner

Submissions for variant NM_033629.6(TREX1):c.391T>G (p.Phe131Val)

dbSNP: rs1064796645
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000484763 SCV000573575 uncertain significance not provided 2017-02-23 criteria provided, single submitter clinical testing The F131V variant in the TREX1 gene has not been reported previously as a pathogenic variant, nor as a benign variant, to our knowledge. This variant is not observed in large population cohorts (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). The F131V variant is a semi-conservative amino acid substitution, which may impact secondary protein structure as these residues differ in some properties. This substitution occurs at a position that is conserved across species. In silico analysis predicts this variant is probably damaging to the protein structure/function. Missense variants in nearby residues (R128H, D130N, P132A) have been reported in the Human Gene Mutation Database in association with lupus (Stenson et al., 2014), supporting the functional importance of this region of the protein. We interpret F131V as a variant of uncertain significance.
Invitae RCV001368721 SCV001565129 uncertain significance Aicardi-Goutieres syndrome 1; Chilblain lupus 1; Retinal vasculopathy with cerebral leukoencephalopathy and systemic manifestations 2022-09-13 criteria provided, single submitter clinical testing This sequence change replaces phenylalanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 131 of the TREX1 protein (p.Phe131Val). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with TREX1-related conditions. ClinVar contains an entry for this variant (Variation ID: 423827). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest 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.

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