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 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 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.
The variant produces p.Gly12Cys in NRAS, which is a well-established pathogenic amino acid change at codon 12 in RAS genes. The same residue (G12) is a recurrent oncogenic hotspot, and multiple NRAS G12 missense changes are classified as pathogenic. The RASopathy VCEP v2.3.0 assigns PS1 at Strong when the same amino acid change has been previously established as pathogenic, applicable across HRAS, KRAS, MRAS, NRAS, RIT1, and RRAS2.
The variant affects codon 12 (p.Gly12Cys), which lies within the P-loop (amino acids 10-17), a critical and well-established functional domain recognized by the RASopathy VCEP. Codon 12 is a statistically significant mutational hotspot without benign variation.
The variant is absent from all gnomAD population datasets (v2.1, v4.1, and gnomAD-Canada v1.0), satisfying the RASopathy VCEP requirement that the variant must be absent from controls.
At least one other pathogenic missense change at the same codon (G12) has been established in NRAS. NRAS G12D, G12V, G12S, G12A, and G12R are well-documented pathogenic variants in both somatic and germline contexts. The RASopathy VCEP assigns PM5 at Moderate strength when one [likely] pathogenic residue change exists at the same codon.
The REVEL score for this missense variant is 0.773, which meets the RASopathy VCEP threshold of ≥0.7 for PP3 at Supporting strength. SpliceAI predicts no splice impact (max delta = 0.00), consistent with a missense effect.
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 Rule7 (1 Pathogenic.Strong + 2 Pathogenic.Moderate + Pathogenic.Supporting >=2) with applied criteria: PS1 strong, PM1 moderate, PM2 supporting, PM5 moderate, PP3 supporting; 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: 0.000. Refer to the recorded PP3/BP4 rationale for interpretation.
2 Pathogenic.
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Gain-of-function; curated oncogenicity label: Likely Oncogenic.
This variant has previously been reported in somatic cancers (COSMIC; COSV54736487, n = 273 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.
29 criteria with recorded statuses: 5 met · 3 not met · 9 not assessed · 12 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_002524.4:c.34G>T (p.Gly12Cys) in NRAS is a missense variant affecting codon 12 in the P-loop (AA 10-17), a critical GTP-binding domain recognized by the RASopathy VCEP.
The p.Gly12Cys amino acid change is a well-established pathogenic alteration in NRAS and homologous RAS genes, meeting PS1 at Strong strength.
The variant lies within the P-loop functional domain (PM1, Moderate) and represents a missense change at a codon where other pathogenic missense variants are established (PM5, Moderate).
The variant is absent from all gnomAD population databases, meeting PM2 at Supporting strength.
REVEL score of 0.773 supports a deleterious effect, meeting PP3 at Supporting strength.
No de novo, cosegregation, case-count, or functional assay data from VCEP-approved platforms were available for this variant; PS2, PS3, PS4, PM6, PP1, BS2, BS4, BP2, and BP5 remain unassessed.
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 |
|---|
Absent from gnomAD v4.1.
Absent from gnomAD v2.1.
Absent from gnomAD-Canada v1.0.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.773. BayesDel score = 0.298187.
8 paper records listed. No publication is explicitly linked to an applied criterion in the recorded metadata.
NRAS G12C mutations were present in 1 of 17 (5.8%) codon 12-mutated tumors and 2 of 8 (25%) codon 13-mutated tumors.
Table 2; Discussion paragraph regarding NRAS G12C/G13C-targeted therapies
Glycine-12 in the transition state mimic is within van der Waals distance of both arginine-789 of GAP-334 and glutamine-61 of Ras, and even its mutation to alanine would disturb the arrangements of residues in the transition state.
Abstract; Figure 4C; Discussion
The G12C mutation had minimal impact on the intrinsic hydrolysis rate.
Throughout (KRAS G12C is a primary subject of the paper)
All mutations were missense changes, affected the glutamine residue at codon 61, and introduced a positively charged amino acid residue.
Results; Table 1
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 as Pathogenic (2 clinical laboratories). (ClinVarID = 40468)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.773. BayesDel score = 0.298187.
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Gain-of-function; curated oncogenicity label: Likely Oncogenic.
This variant lies in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV54736487, n = 273 times).
This variant lies in a statistically significant hotspot.