rs1182896077

Variant names:

• chr22-29678199-A-G
• rs1182896077
• NM_000268.4:c.1450A>G

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 2P and 9B. PM2 BP4_Strong BP6 BS1

The NM_000268.4(NF2):​c.1450A>G​(p.Met484Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,744 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M484T) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: NF2 NM_000268.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:1
• Conservation: PhyloP100: 0.217
• Publications: 2 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: Benign. The variant received -7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.06623897).
• BP6: Variant 22-29678199-A-G is Benign according to our data. Variant chr22-29678199-A-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 527699.
• BS1: Variant frequency is greater than expected in population afr. GnomAdExome4 allele frequency = 0.00000205 (3/1461744) while in subpopulation AFR AF = 0.0000896 (3/33470). AF 95% confidence interval is 0.0000238. There are 0 homozygotes in GnomAdExome4. There are 2 alleles in the male GnomAdExome4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000268.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NF2	NM_000268.4	MANE Select	c.1450A>G	p.Met484Val	missense	Exon 14 of 16	NP_000259.1
	NF2	NM_001407066.1		c.1450A>G	p.Met484Val	missense	Exon 14 of 17	NP_001393995.1
	NF2	NM_016418.5		c.1450A>G	p.Met484Val	missense	Exon 14 of 17	NP_057502.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NF2	ENST00000338641.10	TSL:1 MANE Select	c.1450A>G	p.Met484Val	missense	Exon 14 of 16	ENSP00000344666.5
	NF2	ENST00000397789.3	TSL:1	c.1450A>G	p.Met484Val	missense	Exon 14 of 17	ENSP00000380891.3
	NF2	ENST00000403999.7	TSL:1	c.1450A>G	p.Met484Val	missense	Exon 14 of 16	ENSP00000384797.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000795 AC: 2 AN: 251496 AF XY: 0.0000147

Gnomad AFR exome AF: 0.000123

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461744 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 727162

African (AFR) AF: 0.0000896 AC: 3 AN: 33470

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39692

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53404

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111908

Other (OTH) AF: 0.00 AC: 0 AN: 60392

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	3	-	Neurofibromatosis, type 2 (3)
-	-	1	Hereditary cancer-predisposing syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.050
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.32
CADD	Benign	13
DANN	Benign	0.95
DEOGEN2	Benign	0.31	T
Eigen	Benign	-0.46
Eigen_PC	Benign	-0.35
FATHMM_MKL	Benign	0.17	N
LIST_S2	Benign	0.73	T
M_CAP	Benign	0.046	D
MetaRNN	Benign	0.066	T
MetaSVM	Benign	-0.77	T
MutationAssessor	Benign	1.1	L
PhyloP100		0.22
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-0.020	N
REVEL	Benign	0.17
Sift	Benign	0.63	T
Sift4G	Benign	0.65	T
Polyphen		0.0	B
Vest4		0.12
MutPred		0.54		Loss of glycosylation at P482 (P = 0.0991)
MVP		0.72
MPC		0.65
ClinPred		0.044	T
GERP RS		3.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.048
gMVP		0.24
Mutation Taster		=82/18	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: rs1182896077; hg19: chr22-30074188;