Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2PP2PP3_Moderate
The ENST00000338700.10(TRIM2):c.1876G>A(p.Val626Met) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000821 in 1,461,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
TRIM2 (HGNC:15974): (tripartite motif containing 2) The protein encoded by this gene is a member of the tripartite motif (TRIM) family. The TRIM motif includes three zinc-binding domains, a RING, a B-box type 1 and a B-box type 2, and a coiled-coil region. The protein localizes to cytoplasmic filaments. It plays a neuroprotective role and functions as an E3-ubiquitin ligase in proteasome-mediated degradation of target proteins. Mutations in this gene can cause early-onset axonal neuropathy. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2014]
Verdict is Uncertain_significance. Variant got 5 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
PP2
Missense variant in gene, where missense usually causes diseases (based on misZ statistic), TRIM2. . Gene score misZ 3.5715 (greater than the threshold 3.09). Trascript score misZ 3.9409 (greater than threshold 3.09). GenCC has associacion of gene with Charcot-Marie-Tooth disease type 2R.
PP3
MetaRNN computational evidence supports a deleterious effect, 0.885
Uncertain significance, criteria provided, single submitter
clinical testing
Labcorp Genetics (formerly Invitae), Labcorp
Mar 07, 2023
This variant has not been reported in the literature in individuals affected with TRIM2-related conditions. This variant is present in population databases (rs759524701, gnomAD 0.0009%). This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 599 of the TRIM2 protein (p.Val599Met). ClinVar contains an entry for this variant (Variation ID: 541512). 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. 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. -