About NF2
No gene-level summary was recorded for this case.
No variant summary was recorded for this case.
Five-step scale from benign to pathogenic. This variant is pathogenic. Select a step to read what it means.
Pathogenic.A pathogenic classification under the recorded framework.
Gene-level background from the recorded interpretation.
Words with a dotted underline have a short definition. Hover or tap them.No gene-level summary was recorded for this case.
The recorded framework is Not recorded. The criteria and strengths shown below come from the saved assessment; this page does not recalculate the classification.
The applied criteria and their strengths are shown as assessed under the stated framework.
Nonsense variant NM_000268.3:c.316G>T (p.Glu106Ter) in exon 3 of 16 coding exons. Nonsense-mediated decay is expected as the premature termination codon at position 106 is >50-55 nucleotides upstream of the last exon-exon junction. NF2 loss of function is an established disease mechanism for NF2-related schwannomatosis, an autosomal dominant tumor predisposition syndrome, as demonstrated by multiple germline studies showing truncating variants as causative. No gnomAD population LoF enrichment concerns. Under ClinGen SVI PVS1 recommendations (PMC6185798), a nonsense variant in a gene with established LoF mechanism qualifies for PVS1 at very strong strength.
Variant truncates merlin at codon 106 within the FERM domain (N-terminal, approximately residues 20-300), a well-established critical functional domain required for merlin tumor suppressor activity. The FERM domain mediates merlin's localization to the plasma membrane and cytoskeleton, and its interaction with multiple signaling partners including the Hippo pathway, mTOR, and CRL4-DCAF1. Truncation at this position removes the entire FERM domain and all downstream functional domains (coiled-coil, C-terminal), resulting in complete loss of merlin's tumor suppressor function. The FERM domain is recognized as critical in the NF2 literature and has no reported benign population variation.
Absent from gnomAD v2.1 (exomes) and gnomAD v4.1 (exomes/genomes) with allele frequency of 0. This is well below the 0.1% threshold for PM2 application in a gene where absent/reduced population frequency supports pathogenicity. Also absent from gnomAD-Canada v1.0.
No benign criterion marked as applied in the recorded assessment.
gene-specific framework lacked a usable explicit final combination framework, so generic ACMG/AMP 2015 final-combination rules were applied as fallback; applied criteria: PVS1 very strong, PM1 moderate, PM2 moderate; combination = 1 very strong + 2 moderate, which maps to Pathogenic.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1 allele counts were not recorded for this variant.
Absent from gnomAD v2.1.
Absent from gnomAD-Canada v1.0.
Recorded SpliceAI maximum delta score: 0.180. Refer to the recorded PP3/BP4 rationale for interpretation.
A ClinVar laboratory submission summary was not recorded. ClinVar API review status: criteria provided, single submitter.
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Loss-of-function; curated oncogenicity label: Likely Oncogenic.
This variant has previously been reported in somatic cancers (COSMIC; COSV58532625, n = 2 times).
This variant does not lie in a statistically significant hotspot.
ACMG/AMP criteria under Not recorded, with the data and sources behind each one.
26 criteria with recorded statuses: 3 met · 8 not met · 7 not assessed · 8 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_000268.3:c.316G>T (p.Glu106Ter) is a nonsense variant in exon 3 of the NF2 gene, predicted to undergo nonsense-mediated decay and result in complete loss of merlin protein expression.
NF2 loss of function is an established disease mechanism for NF2-related schwannomatosis, an autosomal dominant tumor predisposition syndrome characterized by bilateral vestibular schwannomas, meningiomas, and spinal tumors.
This variant is absent from gnomAD v2.1 and v4.1 population databases, supporting its rarity and consistent with a pathogenic role in a rare disease.
The variant truncates merlin within the FERM domain (codon 106), a well-established critical functional domain required for membrane localization, cytoskeletal organization, and tumor suppressor signaling through the Hippo, mTOR, and CRL4-DCAF1 pathways.
Under ACMG/AMP 2015 combination rules (PMID:25741868), one very strong criterion (PVS1) plus two moderate criteria (PM1, PM2) meets the threshold for a pathogenic classification.
No criteria match.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
No further detail was recorded.
Every interpreted variant in NF2, mapped onto the exon structure of NM_000268.3. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
Absent from gnomAD v4.1.
Absent from gnomAD v2.1.
Absent from gnomAD-Canada v1.0.
No further detail was recorded.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.18). BayesDel score = 0.66.
9 paper records listed. No publication is explicitly linked to an applied criterion in the recorded metadata. None of the listed paper records explicitly indicates that the variant is named.
C > T transitions leading to a nonsense mutation are the most common mutations in the NF2 gene
Full-text review — variant not found
NF2 ... encodes for the FERM domain protein Merlin
Full-text review — variant not found
Screenshots represent source records captured during evidence collection. Select one to view the recorded source content.
The evidence statements recorded by the interpretation pipeline. They have not been reinterpreted by the page.
Absent from gnomAD v4.1.
Absent from gnomAD v2.1.
Absent from gnomAD-Canada v1.0.
This variant has been reported in ClinVar but submission details could not be extracted. (ClinVarID = 3257850)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.18). BayesDel score = 0.66.
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Loss-of-function; curated oncogenicity label: Likely Oncogenic.
This variant does not lie in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV58532625, n = 2 times).
This variant does not lie in a statistically significant hotspot.