Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP2
The ENST00000338700.10(TRIM2):c.1073C>T(p.Thr358Met) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000204 in 1,613,758 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T358K) has been classified 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 3 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.
Uncertain significance, criteria provided, single submitter
clinical testing
Labcorp Genetics (formerly Invitae), Labcorp
Jan 18, 2023
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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 576190). This variant has not been reported in the literature in individuals affected with TRIM2-related conditions. This variant is present in population databases (rs756377335, gnomAD 0.01%). This sequence change replaces threonine, which is neutral and polar, with methionine, which is neutral and non-polar, at codon 331 of the TRIM2 protein (p.Thr331Met). -