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Variant interpretation report

HRAS c.182A>G, p.(Gln61Arg)

NM_005343.4:c.182A>G NP_005334.1:p.(Gln61Arg) View identifiers
Classification
Pathogenic

Variant description:

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.

In plain language

Gene-level background from the recorded interpretation.

About HRAS

No gene-level summary was recorded for this case.

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.
01The reasoning

How it was classified

The recorded framework is ClinGen HRAS VCEP v2.3.0. The criteria and strengths shown below come from the saved assessment; this page does not recalculate the classification.

Recorded applied criteria

The applied criteria and their strengths are shown as assessed under the stated framework.

Pathogenic evidence criteria: 5 Benign evidence criteria: 0
Pathogenic criteria applied · 5
PS1Strong
PS1 · strong

The p.Gln61Arg substitution is a previously established pathogenic variant at the analogous residue in KRAS and NRAS. Per the RASopathy VCEP, PS1 is applicable for observed analogous residue positions across HRAS, KRAS, MRAS, NRAS, RIT1, and RRAS2. Q61R in KRAS and NRAS is a well-established oncogenic gain-of-function mutation catalogued in COSMIC and ClinVar.

PM1Moderate
PM1 · moderate

The variant substitutes Gln61Arg within the Switch II (SW2) domain (HRAS amino acids 57-64), a critical and well-established functional domain defined by the RASopathy VCEP. SW2 is essential for GTP hydrolysis and GAP interaction. Residue Q61 is a known cancer hotspot (cancerhotspots.org) and is recurrently mutated in somatic cancers (COSMIC n=417). No benign variation is observed at this residue.

PM2Supporting
PM2 · supporting

The variant is absent from gnomAD v2.1 (exomes), gnomAD v4.1 (exomes), and gnomAD-Canada v1.0 (genomes), meeting the VCEP requirement for absence from population controls.

PM5Moderate
PM5 · moderate

At least one other pathogenic missense change has been established at codon 61 of HRAS. The RASopathy VCEP recognizes Q61L (c.182A>T) and Q61K as pathogenic/likely pathogenic changes at the same codon, satisfying the requirement for one (likely) pathogenic residue change at the same codon.

PP3Supporting
PP3 · supporting

REVEL score of 0.811 meets the VCEP threshold of ≥0.7 for pathogenic computational evidence. SpliceAI predicts no splice impact (max delta score = 0.00), consistent with a missense effect rather than a splicing defect. The disease mechanism (gain-of-function) is consistent with a missense change.

Benign criteria applied · 0

No benign criterion marked as applied in the recorded assessment.

Recorded classification: Pathogenic

ClinGen RASopathy Expert Panel Specifications to the ACMG/AMP Variant Interpretation Guidelines for HRAS 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.

02The sources

Evidence at a glance

Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.

SpliceAI score
0.000 maximum delta

Recorded SpliceAI maximum delta score: 0.000. Refer to the recorded PP3/BP4 rationale for interpretation.

ClinVar submissions
4 reported laboratory submissions

3 Likely pathogenic · 1 Pathogenic. ClinVar API review status: criteria provided, multiple submitters, no conflicts.

Context only ClinVar ↗
Functional evidence
Statement recorded

OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Gain-of-function; curated oncogenicity label: Likely Oncogenic.

No listed criterion applied OncoKB ↗
COSMIC
Cancer Hotspots
Somatic evidence
417 recorded samples

This variant has previously been reported in somatic cancers (COSMIC; COSV54236691, n = 417 times).

Cancer Hotspots

This variant lies in a statistically significant hotspot.

For specialists

Technical detail

ACMG/AMP criteria under ClinGen HRAS VCEP v2.3.0, with the data and sources behind each one.

29 criteria with recorded statuses: 5 met · 11 not met · 1 not assessed · 12 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.

Met Not met Not assessed Not applicable

The c.182A>G (p.Gln61Arg) missense variant in HRAS is classified as Pathogenic under the ClinGen RASopathy VCEP v2.3.0 framework.

PS1 (Strong): p.Gln61Arg is a previously established pathogenic variant at the analogous residue in KRAS and NRAS, satisfying the VCEP rule for cross-gene analogous residue application.

PM1 (Moderate): The variant falls within the Switch II domain (SW2, AA 57-64), a VCEP-defined critical functional domain essential for GTP hydrolysis and GAP interaction. Residue Q61 is a statistically significant cancer hotspot (cancerhotspots.org) with 417 somatic occurrences in COSMIC.

PM5 (Moderate): At least one other pathogenic missense change at codon 61 (e.g., Q61L) has been established in HRAS, meeting the VCEP threshold for PM5 at Moderate strength.

PM2 (Supporting): The variant is absent from gnomAD v2.1, v4.1, and gnomAD-Canada population databases, meeting the VCEP requirement for absence from controls.

PP3 (Supporting): The REVEL score of 0.811 exceeds the VCEP threshold of >=0.7 for pathogenic computational prediction. SpliceAI predicts no splice impact (max delta = 0.00).

Combination: PS1 (1 Strong) + PM1 (1 Moderate) + PM5 (1 Moderate) + PM2 (1 Supporting) + PP3 (1 Supporting) satisfies VCEP Rule 7 (1 Strong + 2 Moderate + >=2 Supporting = Pathogenic).

Met · 5

PS1 StrongThe p.Gln61Arg substitution is a previously established pathogenic variant at the analogous residue in KRAS and NRAS. Per the RASopathy VCEP, PS1 is applicable for observed analogous residue positions across HRAS, KRAS, MRAS, NRAS, RIT1, and RRAS2. Q61R in KRAS and NRAS is a well-established oncogenic gain-of-function mutation catalogued in COSMIC and ClinVar. Details ▾Hide ▴
Evidence considered
  • VCEP rule: same amino acid change at analogous residues in KRAS/NRAS qualifies as established pathogenic
  • COSMIC: codon 61 is a recurrent somatic hotspot across RAS genes
  • Q61R is an established activating mutation in KRAS and NRAS
Sources
PM1 ModerateThe variant substitutes Gln61Arg within the Switch II (SW2) domain (HRAS amino acids 57-64), a critical and well-established functional domain defined by the RASopathy VCEP. SW2 is essential for GTP hydrolysis and GAP interaction. Residue Q61 is a known cancer hotspot (cancerhotspots.org) and is recurrently mutated in somatic cancers (COSMIC n=417). No benign variation is observed at this residue. Details ▾Hide ▴
Evidence considered
  • VCEP-defined SW2 domain: AA 57-64
  • Cancer Hotspots: statistically significant residue-level hotspot
  • COSMIC: 417 somatic occurrences at codon 61
  • PMID:9219684: structural evidence that SW2/Q61 is critical for GTPase activity
Sources
PM2 SupportingThe variant is absent from gnomAD v2.1 (exomes), gnomAD v4.1 (exomes), and gnomAD-Canada v1.0 (genomes), meeting the VCEP requirement for absence from population controls. Details ▾Hide ▴
Evidence considered
  • Absent from gnomAD v2.1
  • Absent from gnomAD v4.1
  • Absent from gnomAD-Canada v1.0
Sources
PM5 ModerateAt least one other pathogenic missense change has been established at codon 61 of HRAS. The RASopathy VCEP recognizes Q61L (c.182A>T) and Q61K as pathogenic/likely pathogenic changes at the same codon, satisfying the requirement for one (likely) pathogenic residue change at the same codon. Details ▾Hide ▴
Evidence considered
  • VCEP PM5 rule: 1 (L)P residue change at same codon = Moderate
  • HRAS Q61L (c.182A>T) is a known pathogenic RASopathy variant
  • HRAS Q61K is an established oncogenic variant
  • Codon 61 is a well-characterized mutational hotspot in HRAS
Sources
PP3 SupportingREVEL score of 0.811 meets the VCEP threshold of ≥0.7 for pathogenic computational evidence. SpliceAI predicts no splice impact (max delta score = 0.00), consistent with a missense effect rather than a splicing defect. The disease mechanism (gain-of-function) is consistent with a missense change. Details ▾Hide ▴
Evidence considered
  • REVEL score: 0.811 (≥0.7 threshold)
  • SpliceAI max delta: 0.00 (no splice impact)
Sources

Not met · 11 · evaluated, threshold not reached

PS2 No de novo occurrence data are available for this variant. PS2 requires confirmed de novo status (both maternity and paternity confirmed) in a patient with a RASopathy phenotype and no family history. Details ▾Hide ▴
Evidence considered
  • No de novo case reports identified in the literature or ClinVar submissions for this variant.
Still missing
  • De novo data could strengthen classification if available.
PS4 No proband count data are available to meet the VCEP point-based scoring threshold. While this variant is reported in ClinVar (VCV000160364) as Likely pathogenic/Pathogenic by clinical laboratories and has been observed in somatic cancers (COSMIC, n=417), specific proband counts with RASopathy phenotypes are not available for PS4 point calculation. Details ▾Hide ▴
Evidence considered
  • ClinVar VCV000160364: Likely pathogenic (3 clinical labs)
  • Pathogenic (1 lab)
  • No proband-level phenotype data available for PS4 scoring
Still missing
  • Proband counts with RASopathy-specific phenotypes needed for PS4 point assignment.
Sources
PM6 No assumed de novo data are available for this variant. PM6 requires observation of the variant as assumed de novo (without confirmation of both maternity and paternity) in a patient with a RASopathy phenotype. Details ▾Hide ▴
Evidence considered
  • No assumed de novo reports identified in ClinVar or literature.
Still missing
  • De novo data could contribute to PM6/PS2 scoring.
PP1 No co-segregation data are available for this variant. PP1 requires observation of the variant in affected family members (≥3 informative meioses for Supporting, ≥5 for Moderate, ≥7 for Strong). Details ▾Hide ▴
Evidence considered
  • No segregation data identified in ClinVar submissions or literature.
Still missing
  • Segregation data in affected families could strengthen classification.
BA1 The variant is absent from gnomAD (filtering allele frequency = 0), which is far below the VCEP stand-alone benign threshold of ≥0.05%. Details ▾Hide ▴
Evidence considered
  • Absent from gnomAD v2.1 and v4.1
  • FAF = 0.
Sources
BS1 The variant is absent from gnomAD (filtering allele frequency = 0), which is below the VCEP strong benign threshold of ≥0.025%. Details ▾Hide ▴
Evidence considered
  • Absent from gnomAD v2.1 and v4.1
  • FAF = 0.
Sources
BS2 No data are available documenting this variant in healthy adult individuals. BS2 requires observation in a healthy adult for a dominant disorder with full penetrance expected at an early age. Details ▾Hide ▴
Evidence considered
  • No healthy adult carriers identified in available data.
BS4 No segregation data demonstrating lack of co-segregation with disease are available. BS4 requires at least one informative meiosis showing the variant does not segregate with the RASopathy phenotype. Details ▾Hide ▴
Evidence considered
  • No non-segregation data available.
BP2 No evidence of an alternative molecular cause for a RASopathy in HRAS (in cis/trans with another pathogenic variant) is available. BP2 requires point-based scoring from alternative molecular diagnoses. Details ▾Hide ▴
Evidence considered
  • No alternative molecular cause data available.
BP4 REVEL score of 0.811 exceeds the VCEP benign threshold of ≤0.3. Multiple lines of computational evidence support a deleterious effect (REVEL 0.811, BayesDel 0.249), contradicting BP4 application. Details ▾Hide ▴
Evidence considered
  • REVEL score: 0.811 (>0.3 threshold
  • fails BP4)
  • BayesDel score: 0.248544
Sources
revelbayesdel
BP5 No evidence of an alternative molecular basis for disease in a different gene is available. BP5 requires point-based scoring for an alternative molecular cause of a RASopathy. Details ▾Hide ▴
Evidence considered
  • No alternative molecular diagnosis data available.

Not assessed · 1 · no assessment recorded

PS3 Primary functional study publications for HRAS Q61R were not available for full-text review in the case folder. OncoKB curates HRAS Q61R as Likely Oncogenic/Likely Gain-of-function, and the structural biology literature (PMID:9219684) establishes that Gln61 is essential for GAP-mediated GTP hydrolysis — its mutation constitutively activates Ras. However, variant-specific functional data from VCEP-approved assays (RAS Activation, MEK Activation, ERK Activation) could not be verified from primary sources. Details ▾Hide ▴
Evidence considered
  • OncoKB: curated as Likely Gain-of-function
  • PMID:9219684: structural evidence that Gln61 mutation blocks GTPase activation
Still missing
  • Primary functional assay data for HRAS Q61R not available
  • VCEP-approved assay results needed to assign strength.
Sources
Not applicable · 12· recorded as not applicable Show reasons ▾Hide reasons ▴
PVS1 VCEPPVS1 is not applicable per the ClinGen RASopathy VCEP v2.3.0 for HRAS. This is a missense variant (p.Gln61Arg), not a null variant (nonsense, frameshift, or canonical splice variant). Details ▾Hide ▴
Evidence considered
  • Missense variant c.182A>G (p.Gln61Arg)
  • does not meet null-variant criteria per VCEP.
Sources
PM3 VCEPPM3 is not applicable per the RASopathy VCEP; HRAS-related RASopathies are autosomal dominant disorders, not recessive. Details ▾Hide ▴
Evidence considered
  • VCEP marks PM3 as not applicable.
Sources
PM4 N/APM4 applies to in-frame deletions/insertions and stop-loss variants causing protein length changes. This is a missense substitution. Details ▾Hide ▴
Evidence considered
  • Missense variant
  • PM4 is for in-frame indels and stop-loss.
PP2 VCEPPP2 is not applicable per the RASopathy VCEP because the missense z-score for HRAS is <3.09 in gnomAD. Details ▾Hide ▴
Evidence considered
  • VCEP rule: PP2 not applicable
  • HRAS missense z-score < 3.09.
Sources
PP4 VCEPPP4 is not applicable per the RASopathy VCEP; phenotype specificity is assessed under PS4. Details ▾Hide ▴
Evidence considered
  • VCEP rule: PP4 not applicable
  • see PS4.
Sources
PP5 VCEPPP5 is not for use per the ClinGen Sequence Variant Interpretation VCEP Review Committee recommendation for this VCEP. Details ▾Hide ▴
Evidence considered
  • VCEP rule: PP5 explicitly marked 'Not Applicable for this VCEP'.
Sources
BS3 VCEPBS3 is not applicable per the RASopathy VCEP for HRAS. Details ▾Hide ▴
Evidence considered
  • VCEP marks BS3 as not applicable.
Sources
BP1 N/ABP1 per the RASopathy VCEP is specifically for truncating variants (nonsense, frameshift, canonical splice sites, initiation codon, gene deletions) in RASopathy genes where the disease mechanism is gain-of-function. This is a missense variant; BP1 does not apply. Details ▾Hide ▴
Evidence considered
  • VCEP BP1 rule: applies to truncating variants only in GOF genes
  • missense variant excluded.
Sources
BP3 VCEPBP3 applies to in-frame deletions/insertions in repetitive regions; this is a missense substitution. Details ▾Hide ▴

No further detail was recorded.

BP6 VCEPBP6 is not for use per the ClinGen Sequence Variant Interpretation VCEP Review Committee recommendation for this VCEP. Details ▾Hide ▴
Evidence considered
  • VCEP rule: BP6 explicitly marked 'Not Applicable for this VCEP'.
Sources
BP7 N/ABP7 applies to synonymous variants with no predicted splice impact. This is a missense variant (p.Gln61Arg). Details ▾Hide ▴
Evidence considered
  • Missense variant
  • BP7 is specific to synonymous variants.
PS5 N/APS5 was not included in the adjudication list for this case. Details ▾Hide ▴

No further detail was recorded.

Identifiers

Gene
HRAS
Transcript
NM_005343.4
Coding (HGVS c.)
NM_005343.4:c.182A>G
Protein (HGVS p.)
NP_005334.1:p.(Gln61Arg)
GRCh38
chr11:533874 T>C
GRCh37
chr11:533874 T>C
ClinVar
160364
COSMIC
COSV54236691

Gene diagram

Every interpreted variant in HRAS, mapped onto the exon structure of NM_005343.4. Select a row to find it on the plot.

HRASNM_005343.4
Fetching transcript structure from UCSC…
gnomAD v4.1 Allele count data not recorded
gnomAD v2.1 Allele count data not recorded
gnomAD-Canada v1.0 Allele count data not recorded

Statements

gnomAD v4.1

Absent from gnomAD v4.1.

gnomAD v2.1

Absent from gnomAD v2.1.

gnomAD-Canada

Absent from gnomAD-Canada v1.0.

SpliceAI and Pangolin

Pangolin splice lossmagnitude shown
-0.010
Pangolin splice gain
0.010

Other predictors

REVEL
0.811
BayesDel
0.249

How the predictions were used

PP3 SupportingREVEL score of 0.811 meets the VCEP threshold of ≥0.7 for pathogenic computational evidence. SpliceAI predicts no splice impact (max delta score = 0.00), consistent with a missense effect rather than a splicing defect. The disease mechanism (gain-of-function) is consistent with a missense change. Details ▾Hide ▴
Evidence considered
  • REVEL score: 0.811 (≥0.7 threshold)
  • SpliceAI max delta: 0.00 (no splice impact)
Sources
BP4 REVEL score of 0.811 exceeds the VCEP benign threshold of ≤0.3. Multiple lines of computational evidence support a deleterious effect (REVEL 0.811, BayesDel 0.249), contradicting BP4 application. Details ▾Hide ▴
Evidence considered
  • REVEL score: 0.811 (>0.3 threshold
  • fails BP4)
  • BayesDel score: 0.248544
Sources
revelbayesdel
BP7 N/ABP7 applies to synonymous variants with no predicted splice impact. This is a missense variant (p.Gln61Arg). Details ▾Hide ▴
Evidence considered
  • Missense variant
  • BP7 is specific to synonymous variants.

Statement

In silico

SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.811. BayesDel score = 0.248544.

10 paper records listed. 1 cited in the classification. None of the listed paper records explicitly indicates that the variant is named.

Cited in the classification

  • The Ras-RasGAP complex: structural basis for GTPase activation and its loss in oncogenic Ras mutants.
    Solved the crystal structure of the H-Ras-RasGAP complex at 2.5A resolution. Demonstrated that glutamine-61 of Ras is essential for GTP hydrolysis; its mutation to any amino acid except glutamate blocks GAP-mediated GTPase activation and locks Ras in the active GTP-bound state. The structural mechanism explains why codon 61 substitutions (including Q61R) are oncogenic, but the specific NM_005343.4:c.182A>G variant was not individually tested.
    → PM1 Does not name this variant
    PMID 9219684 ↗
    Source detail
    Glutamine-61 is essential for GTP hydrolysis: Its mutation to any other amino acid (except Glu) blocks Ras-mediated GTP hydrolysis by GAP.

    Location Abstract; Fig. 4C caption (Gln61 structural role); Results, switch II discussion

    Context X-ray crystallography of H-Ras-GDP-AlF3-GAP-334 ternary complex

Other recorded publications

  • ras mutations are associated with aggressive tumor phenotypes and poor prognosis in thyroid cancer.
    Analyzed H-, K-, and N-ras mutations in 125 thyroid carcinoma specimens. HRAS was mutated in 5 of 107 tumors. HRAS codon 61 mutations identified were Q61L (CAG>CTG) and Q61P (CAG>GGG). NM_005343.4:c.182A>G (p.Gln61Arg) was not identified in this study.
    Does not name this variant
    PMID 12947056 ↗
  • Identifying recurrent mutations in cancer reveals widespread lineage diversity and mutational specificity.
    Population-scale mutational hotspot analysis across 11,119 tumors from 41 cancer types. Identified codon Q61 as a statistically significant hotspot in HRAS and NRAS, predominantly in papillary thyroid cancers. Validated RAC1 Q61R (paralogous to HRAS Q61) as an activating mutation in vitro. HRAS Q61R was not specifically analyzed as an individual variant.
    Does not name this variant
    PMID 26619011 ↗
    Quoted passage
    cells expressing RAC1 Q61R, a mutation we identified in a primary prostate cancer that is paralogous to KRAS Q61, also potently induced RAC1 activation

    Results, 'Lineage diversity and mutant allele-specificity'; Fig 3a; Fig 4d-f

  • Pattern of ras and gsp oncogene mutations in radiation-associated human thyroid tumors.
    No paper-specific finding is recorded.
    PMID 7630645 ↗
  • High mutation frequency in ras genes of skin tumors isolated from DNA repair deficient xeroderma pigmentosum patients.
    No paper-specific finding is recorded.
    PMID 8453633 ↗
  • Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.
    ACMG/AMP standards and guidelines for sequence variant interpretation. General framework document that does not discuss any specific variant.
    Does not name this variant
    PMID 25741868 ↗
  • Mutational dynamics between primary and relapse neuroblastomas.
    Schramm A et al. · 2015
    Whole-exome sequencing of 16 paired primary and relapse neuroblastomas. Identified HRAS p.Gly13Arg in one primary tumor retained at relapse. NM_005343.4:c.182A>G (p.Gln61Arg) was not reported.
    Does not name this variant
    PMID 26121086 ↗
  • Relapsed neuroblastomas show frequent RAS-MAPK pathway mutations.
    Eleveld TF et al. · 2015
    Whole-genome sequencing of 23 paired diagnostic and relapse neuroblastomas. Identified RAS-MAPK pathway mutations including ALK, NRAS, KRAS, HRAS, BRAF, PTPN11, and NF1. Specific HRAS Q61R was not reported among the identified mutations.
    Does not name this variant
    PMID 26121087 ↗
  • American College of Medical Genetics and Genomics technical standards and guidelines: microarray analysis for chromosome abnormalities in neoplastic disorders.
    No paper-specific finding is recorded.
    PMID 23619274 ↗
  • 2014 ESC Guidelines on diagnosis and management of hypertrophic cardiomyopathy: the Task Force for the Diagnosis and Management of Hypertrophic Cardiomyopathy of the European Society of Cardiology (ESC).
    Authors/Task Force members et al. · 2014
    No paper-specific finding is recorded.
    PMID 25173338 ↗

Screenshots represent source records captured during evidence collection. Select one to view the recorded source content.

All source links

Statements for reports

The evidence statements recorded by the interpretation pipeline. They have not been reinterpreted by the page.

gnomAD v4.1

Absent from gnomAD v4.1.

gnomAD v2.1

Absent from gnomAD v2.1.

gnomAD-Canada

Absent from gnomAD-Canada v1.0.

ClinVar

This variant has been reported in ClinVar as Likely pathogenic (3 clinical laboratories) and as Pathogenic (1 clinical laboratory). (ClinVarID = 160364)

In silico

SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.811. BayesDel score = 0.248544.

Functional

OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Gain-of-function; curated oncogenicity label: Likely Oncogenic.

Somatic

This variant lies in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV54236691, n = 417 times).

Cancer Hotspots

This variant lies in a statistically significant hotspot.