22-29671881-C-G

Position:

• chr22-29671881-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000268.4(NF2):​c.1055C>G​(p.Thr352Arg) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: NF2 NM_000268.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.04

Genes affected

NF2 (HGNC:7773): (NF2, moesin-ezrin-radixin like (MERLIN) tumor suppressor) This gene encodes a protein that is similar to some members of the ERM (ezrin, radixin, moesin) family of proteins that link cytoskeletal components with proteins in the cell membrane. The encoded protein is involved in regulation of contact-dependent inhibition of cell proliferation and functions in cell-cell adhesion and transmembrane signaling. The encoded protein has been shown to interact with cell-surface proteins, proteins involved in cytoskeletal dynamics, and proteins involved in regulating ion transport. Disruption of this protein's function has been implicated in tumorigenesis and metastasis. Mutations in this gene are associated with neurofibromatosis type II which is characterized by nervous system and skin tumors and ocular abnormalities. [provided by RefSeq, May 2022]

NF2 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.31219822).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NF2	NM_000268.4	c.1055C>G	p.Thr352Arg	missense_variant	11/16	ENST00000338641.10	NP_000259.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NF2	ENST00000338641.10	c.1055C>G	p.Thr352Arg	missense_variant	11/16	1	NM_000268.4	ENSP00000344666.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Neurofibromatosis, type 2 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 08, 2023

This sequence change replaces threonine, which is neutral and polar, with arginine, which is basic and polar, at codon 352 of the NF2 protein (p.Thr352Arg). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with NF2-related conditions. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt NF2 protein function with a negative predictive value of 80%. 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	Benign	0.30
BayesDel_addAF	Uncertain	0.069	T
BayesDel_noAF	Benign	-0.14
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.31	T;.;.;.;.;.;.;.
Eigen	Benign	0.097
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.96	D;D;.;.;D;.;D;D
M_CAP	Benign	0.065	D
MetaRNN	Benign	0.31	T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.34	T
MutationAssessor	Benign	1.5	L;.;L;.;.;L;.;L
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	0.52	N;N;N;N;N;N;N;N
REVEL	Uncertain	0.38
Sift	Benign	0.066	T;T;T;T;T;T;D;T
Sift4G	Benign	0.19	T;T;T;T;T;T;T;T
Polyphen		0.10	B;B;B;B;B;B;B;B
Vest4		0.38
MutPred		0.52		Loss of phosphorylation at T352 (P = 0.0018);.;Loss of phosphorylation at T352 (P = 0.0018);.;.;Loss of phosphorylation at T352 (P = 0.0018);.;Loss of phosphorylation at T352 (P = 0.0018);
MVP		0.68
MPC		0.96
ClinPred		0.89	D
GERP RS		5.6
Varity_R		0.20
gMVP		0.62

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr22-30067870;