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.
Gln61 (amino acid position 61) lies within the Switch II (SW2) functional domain (AA 57-64), one of four critical and well-established functional domains defined by the RASopathy VCEP (P-loop AA 10-17, SW1 AA 25-40, SW2 AA 57-64, SAK AA 145-156). SW2 is essential for GTP hydrolysis and effector interaction. Per VCEP, PM1 is applicable at moderate strength for variants in these domains.
NM_002524.5:c.183A>C is absent from all population databases: gnomAD v2.1, gnomAD v4.1, and gnomAD-Canada v1.0. Per VCEP RASopathy specifications, PM2 is applied at supporting strength when the variant is absent from gnomAD controls.
Codon 61 in NRAS harbors multiple well-established pathogenic missense variants (Q61R, Q61K, Q61L) reported in ClinVar and the literature. Per VCEP, one [likely] pathogenic residue change at the same codon qualifies for PM5 at moderate strength. The PM5 pipeline did not collect proband counts to support PM5_Strong (≥2 different LP/P residue changes at same codon observed in ≥5 probands), though multiple Q61 variants are established as pathogenic in the literature.
REVEL score for NM_002524.5:c.183A>C (p.Q61H) is 0.742, which meets the VCEP threshold of REVEL ≥ 0.7 for PP3 at supporting strength. SpliceAI predicts no significant splice impact (max delta score = 0.00), consistent with a missense effect predicted to be deleterious.
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 Rule14 (2 Pathogenic.Moderate + Pathogenic.Supporting >=2) with applied criteria: PM1 moderate, PM2 supporting, PM5 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 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.
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: Gain-of-function; curated oncogenicity label: Oncogenic.
This variant has previously been reported in somatic cancers (COSMIC; COSV54736320, n = 149 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_002524.5:c.183A>C (p.Gln61His) is absent from gnomAD v2.1, v4.1, and gnomAD-Canada population databases (PM2_Supporting per VCEP).
Gln61 lies within the Switch II functional domain (AA 57-64), a critical and well-established functional domain defined by the RASopathy VCEP for GTP hydrolysis and effector interaction (PM1_Moderate per VCEP).
Multiple established pathogenic missense variants exist at the same codon (Q61R, Q61K, Q61L) in NRAS, satisfying PM5 at moderate strength per VCEP specifications.
REVEL in silico score of 0.742 meets the VCEP threshold for PP3 at supporting strength, predicting a deleterious amino acid substitution.
NM_002524.5:c.183A>C has been reported in ClinVar as Tier I - Strong (ClinVar ID 4530443) and classified as Oncogenic by OncoKB with gain-of-function mechanism. The variant is recurrent in somatic cancers (COSMIC n=149).
No VCEP-approved functional assay data, de novo observations, case-control studies, or segregation data are available for this variant in the germline RASopathy context.
No criteria match.
Every interpreted variant in NRAS, mapped onto the exon structure of NM_002524.5. 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 = 0.742. BayesDel score = 0.130143.
6 paper records listed. 2 cited in the classification.
The results shed light on the function of Gln61 in the intrinsic GTP hydrolysis reaction.
Location Throughout; Gln61 discussed as catalytic residue in switch II region
Context X-ray crystallography of H-Ras with caged GTP photolysis and rapid freeze-trapping at 100K
Mutants of residue Q61 impair the GTPase activity of Ras and are found prominently in human cancers.
Location Throughout; Q61 discussed in context of catalytic mechanism
Context X-ray crystallography of H-Ras GppNHp and GTP complexes, allosteric calcium acetate binding studies
the RD rhabdomyosarcoma cell line (NRAS Q61H; Catalog of Somatic Mutations in Cancer, Wellcome Trust Sanger Institute, Hinxton, Cambridge, United Kingdom)
Introduction para 3; Results; Figures 1-3
the loss of KRAS G12V in MM-146, which showed a concurrent increase in the allele frequency of NRAS Q61H from 8% to 41%
Table 2 (sequential analysis); Results section 'NRAS and KRAS mutations'
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 = 4530443)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.742. BayesDel score = 0.130143.
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; COSV54736320, n = 149 times).
This variant lies in a statistically significant hotspot.