About KRAS
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 KRAS 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.
One de novo observation confirmed by parental genotyping in an infant with Noonan syndrome and lethal hypertrophic cardiomyopathy (Nosan et al. 2013). Per RASopathy VCEP PS2 rules, 1 de novo point confers Moderate strength.
One well-documented RASopathy proband identified — an infant with Noonan syndrome, dysmorphic features, and lethal HCM harboring a de novo G60V variant (Nosan et al. 2013). Per VCEP PS4 point-based rules, ≥1 point confers Supporting strength. The variant is also reported in ClinVar as Pathogenic/Likely Pathogenic by 7 clinical laboratories.
p.Gly60 is located within the Switch II (SW2) domain (amino acids 57–64), a critical and well-established functional domain per RASopathy VCEP specifications. SW2 is one of four domains (P-loop, SW1, SW2, SAK) approved for PM1 application at Moderate strength.
At least two different pathogenic missense changes have been reported at codon 60 — p.Gly60Ser and p.Gly60Arg — in individuals with Noonan syndrome and cardio-facio-cutaneous syndrome (cited in Nosan et al. 2013, referencing Kratz et al. 2009 and Niihori et al. 2006). Per VCEP PM5 rules, ≥1 pathogenic residue change at the same codon confers Moderate strength.
REVEL score of 0.879 exceeds the VCEP threshold of ≥0.7 for PP3 at Supporting strength. SpliceAI max delta score is 0.25, indicating minimal predicted splicing impact, which does not alter the REVEL-based assessment.
No benign criterion marked as applied in the recorded assessment.
ClinGen RASopathy Expert Panel Specifications to the ACMG/AMP Variant Interpretation Guidelines for KRAS Version 2.3.0 v2.3.0 criteria-combination framework: matched Rule13 (Pathogenic.Moderate >=3) with applied criteria: PS2 moderate, PS4 supporting, PM1 moderate, 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: 3 / 1,614,068 alleles. Recorded AF 1.85866e-06. Recorded homozygote count 0.
This variant is present in gnomAD v2.1 (AF= 3.97886e-06; MAF= 0.00040%, 1/251328 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 8.79879e-06; MAF= 0.00088%, 1/113652 alleles, homozygotes = 0).
Absent from gnomAD-Canada v1.0.
Recorded SpliceAI maximum delta score: 0.250. Refer to the recorded PP3/BP4 rationale for interpretation.
4 Pathogenic · 3 Likely 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; COSV55708344, n = 5 times).
This variant lies in a statistically significant hotspot.
ACMG/AMP criteria under ClinGen KRAS VCEP v2.3.0, with the data and sources behind each one.
29 criteria with recorded statuses: 5 met · 10 not met · 2 not assessed · 12 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_033360.3:c.179G>T (p.Gly60Val) is a missense variant in KRAS identified in a single de novo proband with Noonan syndrome and lethal hypertrophic cardiomyopathy (Nosan et al. 2013).
The variant affects Gly60, which resides in the Switch II domain (AA 57–64), a critical functional domain per RASopathy VCEP specifications (PM1_Moderate).
At least two different pathogenic missense changes (p.Gly60Ser, p.Gly60Arg) have been reported at the same codon in RASopathy patients, satisfying PM5 at Moderate strength.
Parental genotyping confirmed the variant occurred de novo, meeting PS2 at Moderate strength (1 de novo point per VCEP rules).
The variant is observed in a single RASopathy proband, meeting PS4 at Supporting strength (≥1 point per VCEP rules).
REVEL in silico score of 0.879 exceeds the VCEP threshold of ≥0.7, meeting PP3 at Supporting strength.
The variant is present at extremely low frequency in gnomAD (v2.1: 1/251,328; v4.1: 3/1,614,068), which is below benign population thresholds but above the PM2 absence requirement.
Applying the RASopathy VCEP classification rules: three Moderate criteria (PS2_Moderate, PM1, PM5) plus two Supporting criteria (PS4_Supporting, PP3) are met. Per VCEP Rule13, ≥3 Moderate criteria yields a classification of Likely Pathogenic.
No criteria match.
No further detail was recorded.
No further detail was recorded.
Every interpreted variant in KRAS, mapped onto the exon structure of NM_033360.3. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| European (non-Finnish)3 / 1,179,982 | 2.5e-06 |
| European (non-Finnish)1 / 113,652 | 8.8e-06 |
This variant is present in gnomAD v4.1 (AF= 1.85866e-06; MAF= 0.00019%, 3/1614068 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 2.54241e-06; MAF= 0.00025%, 3/1179982 alleles, homozygotes = 0); grpmax FAF= 6.8e-07.
This variant is present in gnomAD v2.1 (AF= 3.97886e-06; MAF= 0.00040%, 1/251328 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 8.79879e-06; MAF= 0.00088%, 1/113652 alleles, homozygotes = 0).
Absent from gnomAD-Canada v1.0.
SpliceAI predicts possible splice impact for this variant (max delta score = 0.25). REVEL score = 0.879. BayesDel score = 0.303486.
8 paper records listed. 1 cited in the classification.
This heterozygous unclassified missense variant in exon 3: c.179G>T (p.Gly60Val) might be associated with a lethal form of Noonan syndrome.
Location Abstract; Case Report, paragraph 2; Discussion, paragraphs 1-2; Figure 2
Context Clinical case report; Sanger sequencing of KRAS coding exons; parental DNA genotyping confirmed de novo status
7 KRAS NM_033360.2 (KRAS):c.179G>T p.G60V 3 G->T Glycine>Valine
Results, Table 2 (sample ID 7)
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= 1.85866e-06; MAF= 0.00019%, 3/1614068 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 2.54241e-06; MAF= 0.00025%, 3/1179982 alleles, homozygotes = 0); grpmax FAF= 6.8e-07.
This variant is present in gnomAD v2.1 (AF= 3.97886e-06; MAF= 0.00040%, 1/251328 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 8.79879e-06; MAF= 0.00088%, 1/113652 alleles, homozygotes = 0).
Absent from gnomAD-Canada v1.0.
This variant has been reported in ClinVar as Pathogenic (4 clinical laboratories) and as Likely pathogenic (3 clinical laboratories). (ClinVarID = 163766)
SpliceAI predicts possible splice impact for this variant (max delta score = 0.25). REVEL score = 0.879. BayesDel score = 0.303486.
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; COSV55708344, n = 5 times).
This variant lies in a statistically significant hotspot.