NM_000268.4:c.255T>A

Variant names:

• chr22-29639104-T-A
• rs375802248
• NM_000268.4:c.255T>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000268.4(NF2):​c.255T>A​(p.Asp85Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D85G) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: NF2 NM_000268.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.707
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• NF2-related schwannomatosis

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, ClinGen, Orphanet, Labcorp Genetics (formerly Invitae), G2P
• familial meningioma

  Inheritance: Unknown Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07126719).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NF2	NM_000268.4	c.255T>A	p.Asp85Glu	missense_variant	Exon 3 of 16	ENST00000338641.10	NP_000259.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NF2	ENST00000338641.10	c.255T>A	p.Asp85Glu	missense_variant	Exon 3 of 16	1	NM_000268.4	ENSP00000344666.5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.40
CADD	Benign	8.1
DANN	Benign	0.97
DEOGEN2	Uncertain	0.55	.;D;.;.;.;.;.
Eigen	Benign	-0.91
Eigen_PC	Benign	-0.79
FATHMM_MKL	Benign	0.39	N
LIST_S2	Benign	0.78	T;T;T;.;.;D;T
M_CAP	Benign	0.039	D
MetaRNN	Benign	0.071	T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.40	N;N;N;N;N;.;N
PhyloP100		-0.71
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-1.7	N;N;N;N;N;N;N
REVEL	Benign	0.21
Sift	Benign	0.25	T;T;T;T;T;T;T
Sift4G	Benign	0.25	T;T;T;T;T;T;T
Polyphen		0.0	B;B;.;B;B;B;B
Vest4		0.27
MutPred		0.45		Gain of ubiquitination at K88 (P = 0.0882);Gain of ubiquitination at K88 (P = 0.0882);Gain of ubiquitination at K88 (P = 0.0882);Gain of ubiquitination at K88 (P = 0.0882);Gain of ubiquitination at K88 (P = 0.0882);.;Gain of ubiquitination at K88 (P = 0.0882);
MVP		0.60
MPC		0.60
ClinPred		0.29	T
GERP RS		-1.5
Varity_R		0.40
gMVP		0.094
Mutation Taster		=64/36	polymorphism

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

Other links and lift over

dbSNP: rs375802248; hg19: chr22-30035093;