22-29665030-A-T

Position:

• chr22-29665030-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The ENST00000338641.10(NF2):​c.851A>T​(p.Lys284Met) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. K284R) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: NF2 ENST00000338641.10 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.04

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NF2	NM_000268.4	c.851A>T	p.Lys284Met	missense_variant	9/16	ENST00000338641.10	NP_000259.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NF2	ENST00000338641.10	c.851A>T	p.Lys284Met	missense_variant	9/16	1	NM_000268.4	ENSP00000344666	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251186 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135780

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.86
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Pathogenic	0.15
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.50	T;.;.;.;.;.;.;.;.
Eigen	Uncertain	0.44
Eigen_PC	Uncertain	0.54
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.93	D;D;D;.;.;D;.;D;D
M_CAP	Uncertain	0.29	D
MetaRNN	Uncertain	0.72	D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.51	D
MutationAssessor	Benign	1.8	L;L;.;L;.;.;L;.;L
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D;D;D;D
PrimateAI	Uncertain	0.73	T
PROVEAN	Benign	0.70	N;N;N;N;N;N;N;N;N
REVEL	Uncertain	0.54
Sift	Benign	0.054	T;T;T;D;T;T;D;T;D
Sift4G	Benign	0.085	T;T;T;T;T;T;T;T;T
Polyphen		0.059	B;.;B;P;D;D;P;D;P
Vest4		0.78
MutPred		0.48		Loss of catalytic residue at K284 (P = 0.009);Loss of catalytic residue at K284 (P = 0.009);.;Loss of catalytic residue at K284 (P = 0.009);.;.;Loss of catalytic residue at K284 (P = 0.009);.;Loss of catalytic residue at K284 (P = 0.009);
MVP		0.88
MPC		1.9
ClinPred		0.74	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.64
gMVP		0.63

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: rs764034925; hg19: chr22-30061019;