22-29668350-C-T

Variant names:

• chr22-29668350-C-T
• rs199957176
• NM_000268.4:c.903C>T

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_Strong BP6 BP7 BS1 BS2

The NM_000268.4(NF2):​c.903C>T​(p.Ile301Ile) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000205 in 1,613,498 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. I301I) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000021 (0 hom.)
• Consequence: NF2 NM_000268.4 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:4
• Conservation: PhyloP100: -1.63
• Publications: 3 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: Orphanet, ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• familial meningioma

  Inheritance: Unknown Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.6).
• BP6: Variant 22-29668350-C-T is Benign according to our data. Variant chr22-29668350-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 341071.
• BP7: Synonymous conserved (PhyloP=-1.63 with no splicing effect.
• BS1: Variant frequency is greater than expected in population nfe. GnomAdExome4 allele frequency = 0.0000212 (31/1461236) while in subpopulation NFE AF = 0.0000261 (29/1111572). AF 95% confidence interval is 0.0000183. There are 0 homozygotes in GnomAdExome4. There are 10 alleles in the male GnomAdExome4 subpopulation. Median coverage is 31. This position passed quality control check.
• BS2: High AC in GnomAdExome4 at 31 AD,Unknown gene.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NF2	NM_000268.4	MANE Select	c.903C>T	p.Ile301Ile	synonymous	Exon 10 of 16	NP_000259.1	P35240-1
	NF2	NM_001407066.1		c.903C>T	p.Ile301Ile	synonymous	Exon 10 of 17	NP_001393995.1	P35240-3
	NF2	NM_016418.5		c.903C>T	p.Ile301Ile	synonymous	Exon 10 of 17	NP_057502.2	P35240-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NF2	ENST00000338641.10	TSL:1 MANE Select	c.903C>T	p.Ile301Ile	synonymous	Exon 10 of 16	ENSP00000344666.5	P35240-1
	NF2	ENST00000397789.3	TSL:1	c.903C>T	p.Ile301Ile	synonymous	Exon 10 of 17	ENSP00000380891.3	P35240-3
	NF2	ENST00000403999.7	TSL:1	c.903C>T	p.Ile301Ile	synonymous	Exon 10 of 16	ENSP00000384797.3	P35240-3

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152144 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000119 AC: 3 AN: 251442 AF XY: 0.0000147

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000212 AC: 31 AN: 1461236 Hom.: 0 Cov.: 31 AF XY: 0.0000138 AC XY: 10 AN XY: 726942

African (AFR) AF: 0.00 AC: 0 AN: 33466

American (AMR) AF: 0.0000224 AC: 1 AN: 44706

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26118

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39680

South Asian (SAS) AF: 0.00 AC: 0 AN: 86204

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53368

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.0000261 AC: 29 AN: 1111572

Other (OTH) AF: 0.00 AC: 0 AN: 60356

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152262 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74446

African (AFR) AF: 0.00 AC: 0 AN: 41550

American (AMR) AF: 0.00 AC: 0 AN: 15292

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5174

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10610

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68028

Other (OTH) AF: 0.00 AC: 0 AN: 2112

Alfa AF: 0.0000329 Hom.: 0

Bravo AF: 0.0000189

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	2	Neurofibromatosis, type 2 (3)
-	-	1	Hereditary cancer-predisposing syndrome (1)
-	-	1	NF2-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.60
CADD	Benign	4.8
DANN	Benign	0.73
PhyloP100		-1.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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: rs199957176; hg19: chr22-30064339; COSMIC: COSV100098085;