Genetic Variant NF2:p.Leu472Leu (chr22-29674911-C-T) – ACMG Classification: Benign (-18 pts)

Variant summary

Our verdict is Benign. The variant received -18 ACMG points: 0P and 18B. BP4BP6_Very_StrongBP7BS1BS2

The NM_000268.4(NF2):c.1416C>T(p.Leu472Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000142 in 1,573,120 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 Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. L472L) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00077 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000075 ( 0 hom. )

Consequence

NF2
NM_000268.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:9

Conservation

PhyloP100: -0.429

Publications

2 publications found

Variant links:

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

NF2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -18 ACMG points.

BP4

Computational evidence support a benign effect (REVEL=0.208).

BP6

Variant 22-29674911-C-T is Benign according to our data. Variant chr22-29674911-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 417150.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.429 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000775 (118/152330) while in subpopulation AFR AF = 0.00277 (115/41582). AF 95% confidence interval is 0.00236. There are 0 homozygotes in GnomAd4. There are 52 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 118 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

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
NF2	NM_000268.4	MANE Select	c.1416C>T	p.Leu472Leu	synonymous	Exon 13 of 16	NP_000259.1
NF2	NM_001407066.1		c.1416C>T	p.Leu472Leu	synonymous	Exon 13 of 17	NP_001393995.1
NF2	NM_016418.5		c.1416C>T	p.Leu472Leu	synonymous	Exon 13 of 17	NP_057502.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
NF2	ENST00000338641.10	TSL:1 MANE Select	c.1416C>T	p.Leu472Leu	synonymous	Exon 13 of 16	ENSP00000344666.5
NF2	ENST00000397789.3	TSL:1	c.1416C>T	p.Leu472Leu	synonymous	Exon 13 of 17	ENSP00000380891.3
NF2	ENST00000403999.7	TSL:1	c.1416C>T	p.Leu472Leu	synonymous	Exon 13 of 16	ENSP00000384797.3

Frequencies

GnomAD3 genomes

AF:

0.000775

AC:

118

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00277

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000163

AC:

AN:

183894

AF XY:

0.000133

show subpopulations

Gnomad AFR exome

AF:

0.00266

Gnomad AMR exome

AF:

0.0000356

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:

0.0000746

AC:

106

AN:

1420790

Hom.:

Cov.:

AF XY:

0.0000598

AC XY:

AN XY:

702638

show subpopulations

African (AFR)

AF:

0.00261

AC:

AN:

32548

American (AMR)

AF:

0.0000765

AC:

AN:

39206

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25362

East Asian (EAS)

AF:

0.00

AC:

AN:

37602

South Asian (SAS)

AF:

0.00

AC:

AN:

80702

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50450

Middle Eastern (MID)

AF:

0.000524

AC:

AN:

5722

European-Non Finnish (NFE)

AF:

9.17e-7

AC:

AN:

1090398

Other (OTH)

AF:

0.000238

AC:

AN:

58800

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000775

AC:

118

AN:

152330

Hom.:

Cov.:

AF XY:

0.000698

AC XY:

AN XY:

74500

show subpopulations

African (AFR)

AF:

0.00277

AC:

115

AN:

41582

American (AMR)

AF:

0.000131

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68024

Other (OTH)

AF:

0.000473

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000776

Hom.:

Bravo

AF:

0.000759

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

ClinVar submissions as Germline

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Neurofibromatosis, type 2 (3)

Hereditary cancer-predisposing syndrome (2)

not specified (2)

NF2-related disorder (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.068

BayesDel_noAF

Benign

-0.32

CADD

Benign

5.4

(source)

DANN

Uncertain

0.99

PhyloP100

-0.43

Mutation Taster

=93/7

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over