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NM_006767.4:c.2417T>G
p.Leu806Trp · LZTR1
0%
complete
Final classification
VUS
PM2BP4
LZTR1
c.2417T>G
p.Leu806Trp
This variant

The LZTR1 c.2417T>G (p.Leu806Trp) variant has not been observed in somatic cancers in COSMIC and has been reported in ClinVar as likely pathogenic by a single clinical laboratory.

Transcript
NM_006767.4
HGVS · transcript:coding
NM_006767.4:c.2417T>G
GRCh38
chr22:20997242 T>G
GRCh37
chr22:21351531 T>G
ClinGen RASopathy Expert Panel Specifications to the ACMG/AMP Variant Interpretation Guidelines for LZTR1 Version 1.3.0 v1.3.0 criteria-combination framework was evaluated deterministically with applied criteria: PM2 supporting, BP4 supporting; no rule matched the adjudicated criteria.
Classification rationale
PM2 BP4 VUS
LZTR1 c.2417T>G

The LZTR1 c.2417T>G (p.Leu806Trp) variant has not been observed in somatic cancers in COSMIC and has been reported in ClinVar as likely pathogenic by a single clinical laboratory.1 This variant is absent from gnomAD v2.1 and gnomAD v4.1, corresponding to an observed allele frequency of 0 in both datasets.2 Computational evidence supports a benign interpretation because REVEL is 0.174, below the LZTR1 BP4 threshold of 0.3, SpliceAI predicts no splice effect with a maximum delta score of 0.00, and BayesDel is -0.202983.3

PM2 + BP4 VUS
LYFE Sciences is an AI system, and it can make mistakes. Criteria may be applied incorrectly, sources may be misread, and a confident-looking classification can still be wrong. Double-check every criterion and its underlying evidence before relying on any call.
Gene diagram · NM_006767.4 · variants mapped to exon structure
LZTR1 NM_006767.4
Fetching transcript structure from UCSC…
Applied criteria · 2 applied · 17 assessed
MetEvidence satisfies this criterion.
Not metEvaluated against available evidence; threshold not reached.
Not assessedApplies in principle, but no evidence was found to evaluate it.
N/ADoesn't apply to this variant type.
Applied · 2
Strength Supporting Moderate Strong Very strong
PM2 supporting Pathogenic
This variant is absent from gnomAD v2.1 and gnomAD v4.1, corresponding to an observed allele frequency of 0 in both datasets. This satisfies the LZTR1 specification requirement for PM2 at Supporting strength because the variant is absent from population controls and is below the AR support threshold of 0.0025%.
Absent from gnomAD v2.1Absent from gnomAD v4.1
BP4 supporting Benign
REVEL is 0.174, which is below the LZTR1 BP4 threshold of 0.3, and SpliceAI predicts no significant splice impact with a maximum delta score of 0.00. BayesDel is also negative at -0.202983. These computational findings support no meaningful effect on protein function or splicing, so BP4 is met at Supporting strength.
REVEL 0.174SpliceAI max delta 0.00BayesDel -0.202983
Assessed · not applied · 5 not met · 12 not assessed
Pathogenic
PVS1 This is a missense variant, not a null variant, and SpliceAI predicts no splice impact with a maximum delta score of 0.00.
PS1 No previously established pathogenic LZTR1 variant with the same amino acid change was identified in the available records, so PS1 cannot be applied from the current evidence.
PS2 No confirmed de novo occurrence with maternity and paternity confirmation was identified for this variant, so PS2 cannot be applied from the current evidence.
PS3 No approved variant-specific functional study was identified for this variant, so PS3 cannot be applied from the current evidence.
PS4 No published enrichment study, case series, or scored proband dataset was identified for this variant.
PM3 No evidence was identified that this variant was observed in trans with a pathogenic variant in a recessive case, so PM3 cannot be applied from the current evidence.
PM4 This is a missense substitution and does not cause a protein length change from an in-frame insertion, in-frame deletion, or stop-loss variant, so PM4 is not met.
PM5 No pathogenic or likely pathogenic missense change at codon 806 was identified in the available records, so PM5 cannot be applied from the current evidence.
PM6 No assumed de novo observation without full parental confirmation was identified for this variant, so PM6 cannot be applied from the current evidence.
PP1 No segregation data were identified for this variant, so PP1 cannot be applied from the current evidence.
PP3 REVEL is 0.174, which is below the LZTR1 PP3 threshold of 0.7, SpliceAI predicts no significant splice impact with a maximum delta score of 0.00, and BayesDel is -0.202983.
Benign
BA1 This variant is absent from gnomAD v2.1 and gnomAD v4.1, corresponding to an observed allele frequency of 0, which is below the BA1 threshold of 0.05%.
BS1 This variant is absent from gnomAD v2.1 and gnomAD v4.1, corresponding to an observed allele frequency of 0, which is below the BS1 threshold of 0.025%.
BS2 No healthy carrier or unaffected adult observation meeting the LZTR1 phenotypic specifications was identified for this variant, so BS2 cannot be applied from the current evidence.
BS4 No non-segregation data were identified for this variant, so BS4 cannot be applied from the current evidence.
BP2 No evidence was identified that this variant occurred with an alternative explained phenotype scenario or qualifying phase context under the RASopathy point-based benign framework, so BP2 cannot be applied from the current evidence.
BP5 No evidence was identified for an alternative molecular explanation meeting the RASopathy benign point-based framework, so BP5 cannot be applied from the current evidence.
N/A · 9 PM1 · PP2 · PP4 · PP5 · BS3 · BP1 · BP3 · BP6 · BP7
Research & evidence
Population frequency
gnomAD v4.1 screenshot
gnomAD v4.1
gnomAD v2.1 screenshot
gnomAD v2.1
v4.1
Absent from gnomAD v4.1.
v2.1
Absent from gnomAD v2.1.
Allele frequency by ancestry
three datasets · side by side
gnomAD v4.1
Absent · 0 / ?
0 hom
Not observed in any ancestry group.
gnomAD v2.1
Absent · 0 / ?
0 hom
Not observed in any ancestry group.
ClinVar screenshot
ClinVar
This variant has been reported in ClinVar as Likely pathogenic (1 clinical laboratory).
SpliceAI screenshot
In silico
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.174. BayesDel score = -0.202983.
Functional / OncoKB screenshot
Functional Unknown Oncogenic Effect
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. LZTR1, a ubiquitin ligase adaptor protein, is recurrently altered by mutation in glioblastoma, Noonan syndrome, and schwannomatosis.
OncoKB ↗
COSMIC screenshot
COSMIC
Cancer hotspots screenshot
Cancer hotspots
Somatic evidence Not in COSMIC / hotspots
COSMIC
This variant does not lie in a statistically significant hotspot. This variant has not previously been reported in somatic cancers (COSMIC).
Hotspots
This variant does not lie in a statistically significant hotspot.
Sources & reference links
8Sources
CSpec VCEP
ClinVar
gnomAD v2.1
gnomAD v4.1
SpliceAI
OncoKB
COSMIC
Cancer hotspots