About NRAS
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 likely pathogenic. Select a step to read what it means.
Likely pathogenic.A likely 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 ClinGen NRAS VCEP v2.3.0. 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.
NM_002524.4:c.35G>A (p.Gly12Asp) is the same amino acid change as well-established pathogenic G12D variants in HRAS, KRAS, and other RAS genes, satisfying the RASopathy VCEP PS1 rule for analogous pathogenic residue positions. ClinVar classifies NRAS G12D as Pathogenic (11 clinical laboratories) and Likely pathogenic (3 laboratories).
NRAS G12D has been observed in multiple probands with RASopathy-spectrum phenotypes. ClinVar reports 14 usable submissions including clinical laboratories classifying as Pathogenic. G12D is reported in juvenile myelomonocytic leukemia (JMML), a RASopathy-associated condition (PMID:17332249). Meeting VCEP PS4 threshold of at least 1 point (Supporting).
Gly12 is located in the P-loop domain (amino acids 10-17), one of four critical and well-established functional domains specified by the RASopathy VCEP (P-loop, SW1, SW2, SAK). The P-loop is a mutational hotspot without benign variation, satisfying PM1 at Moderate strength.
REVEL score is 0.783, which meets the RASopathy VCEP PP3 threshold of ≥0.7 for missense variants. SpliceAI predicts no splice impact (max delta=0.00), consistent with a missense mechanism rather than splicing effect. BayesDel score (0.329) is below typical pathogenic thresholds but REVEL is the specified VCEP metric.
No benign criterion marked as applied in the recorded assessment.
ClinGen RASopathy Expert Panel Specifications to the ACMG/AMP Variant Interpretation Guidelines for NRAS Version 2.3.0 v2.3.0 criteria-combination framework: matched Rule11 (1 Pathogenic.Strong + 1 Pathogenic.Moderate) with applied criteria: PS1 strong, PS4 supporting, PM1 moderate, PP3 supporting; maps to Likely Pathogenic.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 17 / 1,613,956 alleles. Recorded AF 1.05331e-05. Recorded homozygote count 0.
This variant is present in gnomAD v2.1 (AF= 7.95279e-06; MAF= 0.00080%, 2/251484 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 4.61936e-05; MAF= 0.00462%, 1/21648 alleles, homozygotes = 0).
Absent from gnomAD-Canada v1.0.
Recorded SpliceAI maximum delta score: 0.000. Refer to the recorded PP3/BP4 rationale for interpretation.
11 Pathogenic · 3 Likely pathogenic.
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Gain-of-function; curated oncogenicity label: Oncogenic.
This variant has previously been reported in somatic cancers (COSMIC; COSV54736383, n = 1303 times).
This variant lies in a statistically significant hotspot.
ACMG/AMP criteria under ClinGen NRAS VCEP v2.3.0, with the data and sources behind each one.
25 criteria with recorded statuses: 4 met · 12 not met · 1 not assessed · 8 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_002524.4:c.35G>A (p.Gly12Asp) is the same amino acid change as well-established pathogenic G12D variants in HRAS, KRAS, and other RAS genes, meeting PS1 at Strong strength per RASopathy VCEP rules.
Gly12 is located in the P-loop domain (amino acids 10-17), a VCEP-specified critical functional domain and mutational hotspot without benign variation, meeting PM1 at Moderate strength.
REVEL score of 0.783 meets the VCEP PP3 threshold of ≥0.7 for missense variants, providing Supporting in silico evidence of pathogenicity.
NRAS G12D has been observed in multiple probands with RASopathy-spectrum phenotypes including juvenile myelomonocytic leukemia, meeting PS4 at Supporting strength (≥1 point).
The variant is present at extremely low frequency in gnomAD (max AF=0.0046%), far below BA1 (0.05%) and BS1 (0.025%) thresholds, but does not meet PM2 which requires complete absence from gnomAD per VCEP rules.
Extensive functional evidence for NRAS G12D exists in the literature including mouse models and biochemical assays, but VCEP-approved functional assay verification for the specific variant in germline RASopathy context requires human review.
No criteria match.
Every interpreted variant in NRAS, mapped onto the exon structure of NM_002524.4. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| Ashkenazi Jewish1 / 29,598 | 3.4e-05 |
| European (non-Finnish)15 / 1,179,834 | 1.3e-05 |
| South Asian1 / 91,082 | 1.1e-05 |
| European (Finnish)1 / 21,648 | 4.6e-05 |
| European (non-Finnish)1 / 113,762 | 8.8e-06 |
This variant is present in gnomAD v4.1 (AF= 1.05331e-05; MAF= 0.00105%, 17/1613956 alleles, homozygotes = 0) and has highest observed frequency in the Ashkenazi Jewish population (AF= 3.37861e-05; MAF= 0.00338%, 1/29598 alleles, homozygotes = 0); grpmax FAF= 7.63e-06.
This variant is present in gnomAD v2.1 (AF= 7.95279e-06; MAF= 0.00080%, 2/251484 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 4.61936e-05; MAF= 0.00462%, 1/21648 alleles, homozygotes = 0).
Absent from gnomAD-Canada v1.0.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.783. BayesDel score = 0.328551.
7 paper records listed. 2 cited in the classification.
Most mutations (112 of 257; 43.6%) were found at codon 12, mostly resulting in changes from glycine to asparagine
Location Abstract; Results, codon 12 mutation description
cells were infected with equivalent multiplicity of infection of retrovirus-expressing empty vector, N-Ras G12D, N-Ras WT
Location Methods (focus formation assay); Results; Table 1
Context A31 fibroblast focus formation assay, RAF-1 pull-down assay, murine bone marrow colony-forming assay, HEK 293T/17 cells
NrasG12D/+ mice develop a chronic myeloproliferative neoplasm
Abstract; Results; throughout
N-RasG12D did not alter the growth properties of the epithelium, but was able to confer resistance to apoptosis
Abstract; Results; Figure 1-3
expression of endogenous oncogenic Nras (NrasG12D/+) in hematopoietic cells leads to expansion of myeloid progenitors, increased long-term reconstitution of bone marrow cells, and a chronic myeloproliferative neoplasm (MPN)
Abstract; Results
N-RasG12D was not capable of immortalizing p16INK4a-deficient melanocytes
Abstract; Results; Figure 2; Table 1-2
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.
This variant is present in gnomAD v4.1 (AF= 1.05331e-05; MAF= 0.00105%, 17/1613956 alleles, homozygotes = 0) and has highest observed frequency in the Ashkenazi Jewish population (AF= 3.37861e-05; MAF= 0.00338%, 1/29598 alleles, homozygotes = 0); grpmax FAF= 7.63e-06.
This variant is present in gnomAD v2.1 (AF= 7.95279e-06; MAF= 0.00080%, 2/251484 alleles, homozygotes = 0) and has highest observed frequency in the European (Finnish) population (AF= 4.61936e-05; MAF= 0.00462%, 1/21648 alleles, homozygotes = 0).
Absent from gnomAD-Canada v1.0.
This variant has been reported in ClinVar as Pathogenic (11 clinical laboratories) and as Likely pathogenic (3 clinical laboratories). (ClinVarID = 39648)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.783. BayesDel score = 0.328551.
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Gain-of-function; curated oncogenicity label: Oncogenic.
This variant lies in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV54736383, n = 1303 times).
This variant lies in a statistically significant hotspot.