rs745985238

Positions:

• chr4-153275928-C-A
• chr4-153275928-C-G
• chr4-153275928-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP2

The ENST00000338700.10(TRIM2):​c.251C>A​(p.Thr84Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,890 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. T84I) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: TRIM2 ENST00000338700.10 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.53

Genes affected

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]

ACMG classification

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.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TRIM2	NM_015271.5	c.251C>A	p.Thr84Asn	missense_variant	3/12	ENST00000338700.10	NP_056086.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TRIM2	ENST00000338700.10	c.251C>A	p.Thr84Asn	missense_variant	3/12	1	NM_015271.5	ENSP00000339659

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461890 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727248

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Charcot-Marie-Tooth disease type 2R Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 14, 2023

This variant has not been reported in the literature in individuals affected with TRIM2-related conditions. 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. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces threonine, which is neutral and polar, with asparagine, which is neutral and polar, at codon 57 of the TRIM2 protein (p.Thr57Asn). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.86
BayesDel_addAF	Uncertain	0.047	T
BayesDel_noAF	Benign	-0.17
CADD	Pathogenic	28
DANN	Uncertain	0.99
DEOGEN2	Benign	0.21	.;T;T;.;.;.
Eigen	Uncertain	0.59
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.90	D;D;D;D;.;D
M_CAP	Benign	0.047	D
MetaRNN	Uncertain	0.61	D;D;D;D;D;D
MetaSVM	Benign	-0.33	T
MutationAssessor	Benign	0.44	.;N;.;.;.;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.91	D
PROVEAN	Benign	-2.0	N;N;.;N;.;.
REVEL	Uncertain	0.33
Sift	Uncertain	0.0080	D;D;.;D;.;.
Sift4G	Benign	0.30	T;D;D;D;T;T
Polyphen		1.0	D;D;.;.;.;.
Vest4		0.76, 0.77, 0.75, 0.76, 0.72
MutPred		0.56		Loss of catalytic residue at T57 (P = 0.0756);Loss of catalytic residue at T57 (P = 0.0756);Loss of catalytic residue at T57 (P = 0.0756);.;Loss of catalytic residue at T57 (P = 0.0756);Loss of catalytic residue at T57 (P = 0.0756);
MVP		0.27
MPC		2.0
ClinPred		0.90	D
GERP RS		5.6
Varity_R		0.46
gMVP		0.59

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

Other links and lift over

dbSNP: rs745985238; hg19: chr4-154197080;