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NM_005188.3:c.1238G>A
p.Gly413Asp · CBL
ACMG/AMP
0%
complete
Final classification
VUS
PM2
CBL
c.1238G>A
p.Gly413Asp
missense · exon 9

CBL encodes a protein that helps attach ubiquitin to activated signaling proteins, marking them for breakdown and helping limit signals from receptors such as EGFR, PDGFR, MET, and FLT3. Germline changes in CBL are associated with Noonan syndrome and an increased predisposition to juvenile myelomonocytic leukemia. CBL is involved in cancer development, with alterations reported in blood cancers, lung adenocarcinoma, and melanoma.

This variant

This CBL missense variant affects a protein that helps regulate signaling through receptor pathways involved in Noonan syndrome and juvenile myelomonocytic leukemia predisposition.

Transcript
NM_005188.3
HGVS · transcript:coding
NM_005188.3:c.1238G>A
GRCh38
chr11:119278520 G>A
GRCh37
chr11:119149230 G>A
VUS: PM2 at supporting strength alone does not satisfy any generic ACMG/AMP combination threshold.
Classification rationale
PM2 VUS
CBL c.1238G>A missense · exon 9

PM2 supporting: gnomAD v4.1 frequencies are below the 0.0001 threshold.

PM2 → 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_005188.3 · variants mapped to exon structure
CBL NM_005188.3
Fetching transcript structure from UCSC…
Applied criteria · 1 applied · 23 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 · 1
Strength Supporting Moderate Strong Very strong
PM2 supporting Pathogenic
Met at supporting strength: gnomAD v4.1 total AF 6.19554e-07 and maximum subpopulation AF 1.5998e-05 are below 0.0001.
No governing CBL VCEP or gene-specific non-cancer/exome-only population-source requirement was available; the default all-comers gnomAD entries therefore apply.The supplied ClinGen SVI calibration specifies PM2 at supporting strength for AF <=0.0001 (PMID:25741868).gnomAD v2.1 reports the variant as absent.
Assessed · not applied · 4 not met · 19 not assessed
Pathogenic
PS1 Not assessed: no validated pathogenic same-amino-acid comparator for p.Gly413Asp was identified.
PS2 Not assessed: no confirmed de novo result or verified parental genotypes are documented for the proband's CBL p.Gly413Asp variant.
PS3 Not assessed: no variant-specific validated functional assay, controls, or biological readout were available for p.Gly413Asp.
PS4 Not assessed: no case-control counts or enrichment statistic for NM_005188.3:c.1238G>A were available.
PM1 Not assessed: no authoritative CBL domain boundary was available for residue 413, and no significant CBL G413 hotspot was found.
PM3 Not assessed: no affected-proband observation or phased pathogenic CBL variant in trans is documented for NM_005188.3:c.1238G>A.
PM5 Not assessed: zero eligible pathogenic or likely pathogenic same-residue comparator variants were identified at CBL residue 413.
PM6 Not assessed: no published or case-level evidence describes this CBL variant as de novo without parental confirmation.
PP1 Not assessed: zero affected relatives or informative meioses are documented for segregation of CBL c.1238G>A.
PP2 Not assessed: CBL loss-of-function evidence does not establish the missense-predominant disease mechanism and low benign missense variation required for PP2.
PP3 Not met: REVEL 0.628 is below the >=0.644 supporting PP3 threshold from the ClinGen SVI calibration.
PP4 Not assessed: no patient phenotype, family history, or disease-specific clinical description was available.
PP5 Not assessed: ClinVar has one exact-match laboratory Uncertain significance submission and zero expert-panel Pathogenic or Likely pathogenic assertions.
Benign
BA1 Not met: gnomAD v4.1 maximum observed population AF is 1.5998e-05, far below the generic BA1 threshold of 0.05.
BS1 Not met: gnomAD v4.1 maximum observed population AF is 1.5998e-05, far below the generic BS1 threshold of 0.01.
BS2 Not assessed: gnomAD reports zero homozygotes, but no healthy adult homozygous or hemizygous observation is documented for BS2.
BS3 Not assessed: no validated assay demonstrated preserved CBL function for p.Gly413Asp with appropriate controls and a benign calibration.
BS4 Not assessed: no tested unaffected relatives carrying CBL c.1238G>A are documented to demonstrate non-segregation.
BP1 Not assessed: CBL loss-of-function evidence does not establish that pathogenic missense variants are rare enough to satisfy BP1.
BP2 Not assessed: no phased cis or trans co-occurrence with a pathogenic variant is documented for NM_005188.3:c.1238G>A.
BP4 Not met: REVEL 0.628 exceeds the <=0.29 supporting BP4 threshold from the ClinGen SVI calibration.
BP5 Not assessed: no affected individual with an alternative molecular explanation or qualifying alternative diagnosis was documented.
BP6 Not assessed: ClinVar has one exact-match laboratory Uncertain significance submission and zero expert-panel Benign or Likely benign assertions.
N/A · 4 PVS1 · PM4 · BP3 · BP7
Research & evidence
Population frequency
gnomAD v4.1 screenshot
gnomAD v4.1
gnomAD v2.1 screenshot
gnomAD v2.1
v4.1
This variant is present in gnomAD v4.1 (AF= 6.19554e-07; MAF= 0.00006%, 1/1614064 alleles, homozygotes = 0) and has highest observed frequency in the Remaining individuals population (AF= 1.5998e-05; MAF= 0.00160%, 1/62508 alleles, homozygotes = 0).
v2.1
Absent from gnomAD v2.1.
🇨🇦 CA
Not available in gnomAD-Canada v1.0.
Allele frequency by ancestry
three datasets · side by side
gnomAD v4.1
6.2e-05% · 1 / 1,614,064
0 hom
Remaining individuals
1 / 62,508
0.0016%
+ 9 not observed (Admixed American, European (Finnish), Amish, East Asian, Middle Eastern, South Asian, Ashkenazi Jewish, African/African American, European (non-Finnish))
gnomAD v2.1
Absent · 0 / ?
0 hom
Not observed in any ancestry group.
gnomAD Canada 🇨🇦
Absent · 0 / ?
0 hom
Not observed in any ancestry group.
ClinVar screenshot
ClinVar
This variant has been reported in ClinVar as Uncertain significance (1 clinical laboratory). (ClinVarID = 1412642)
SpliceAI screenshot
In silico
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.16). REVEL score = 0.628. BayesDel score = 0.171278.
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. CBL, a tumor suppressor and ubiquitin ligase, is inactivated by mutation or deletion in various cancer types including myeloid malignancies.
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
ClinVar
gnomAD v2.1
gnomAD v4.1
gnomAD-Canada
SpliceAI
OncoKB
COSMIC
Cancer hotspots