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NM_000455.5:c.22C>G
p.Gln8Glu · STK11
ACMG/AMP
0%
complete
Final classification
VUS
PM2BP4
STK11
c.22C>G
p.Gln8Glu
This variant

The STK11 c.22C>G (p.Gln8Glu) variant has been reported in ClinVar as uncertain significance by five clinical laboratory submissions.

Transcript
NM_000455.5
HGVS · transcript:coding
NM_000455.5:c.22C>G
GRCh38
chr19:1206935 C>G
GRCh37
chr19:1206934 C>G
gene-specific framework lacked a usable explicit final combination framework, so generic ACMG/AMP 2015 final-combination rules were applied as fallback; applied criteria: PM2 supporting, BP4 supporting; combination = 1 supporting + 1 supporting benign, which maps to VUS because the evidence is conflicting.
Classification rationale
PM2 BP4 VUS
STK11 c.22C>G

The STK11 c.22C>G (p.Gln8Glu) variant has been reported in ClinVar as uncertain significance by five clinical laboratory submissions.1 This variant is very rare in population databases, with AF 4.6322e-06 in gnomAD v2.1 and AF 2.50785e-06 in gnomAD v4.1, supporting rarity but not a benign frequency threshold.2 Computational evidence supports no significant impact on splicing or protein function, with SpliceAI max delta score 0.00, REVEL 0.032, and BayesDel -0.435498.3

PM2 + BP4 VUS
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.
Gene diagram · NM_000455.5 · variants mapped to exon structure
STK11 NM_000455.5
Fetching transcript structure from UCSC…
Applied criteria · 2 applied · 21 assessed
MetEvidence satisfies this criterion.
Not metEvaluated against available evidence; threshold not reached.
Not assessedApplies in principle, but no evidence was found to evaluate it.
N/ADoesn't apply to this variant type.
Applied · 2
Strength Supporting Moderate Strong Very strong
PM2 supporting Pathogenic
This variant is very rare in population databases, with AF 4.6322e-06 in gnomAD v2.1 and AF 2.50785e-06 in gnomAD v4.1, both below the 0.1% PM2 threshold used for non-VCEP review.
gnomAD v2.1: 1/215880 allelesAF 4.632203075782842e-060 homozygotes
BP4 supporting Benign
Multiple computational results support no significant impact: SpliceAI predicts no significant splice effect with max delta score 0.00, REVEL is 0.032, and BayesDel is -0.435498, together arguing against a deleterious effect.
SpliceAI max delta score 0.00REVEL score 0.032BayesDel score -0.435498
Assessed · not applied · 6 not met · 15 not assessed
Pathogenic
PS1 No evidence was identified showing that this amino acid change has already been established as pathogenic from a different nucleotide change.
PS2 No confirmed de novo occurrence with parental confirmation was identified for this variant.
PS3 No validated functional study demonstrating a damaging effect of this specific STK11 variant was identified.
PS4 This variant is present in ClinVar, but no proband count, case-control enrichment, or other case-level data sufficient to show increased prevalence in affected individuals was identified.
PM1 Available evidence does not place p.(Gln8Glu) in a statistically significant hotspot, and no critical STK11 functional region at residue 8 was identified from the reviewed sources.
PM5 No established pathogenic missense comparator at codon 8 was identified from the reviewed evidence.
PM6 No assumed de novo occurrence without full parental confirmation was identified for this variant.
PP1 No segregation data were identified for this variant in affected family members.
PP2 The reviewed evidence did not provide a gene-specific basis to apply PP2 for this missense variant.
PP3 Available computational evidence does not support a deleterious effect: SpliceAI predicts no significant splice impact with max delta score 0.00, REVEL is low at 0.032, and BayesDel is negative at -0.435498.
PP4 No patient-specific phenotype information was available to determine whether the clinical presentation is highly specific for STK11-related disease.
PP5 ClinVar reports this variant as uncertain significance rather than as a pathogenic or likely pathogenic variant from a reputable source.
Benign
BA1 Population frequency does not reach the standalone benign threshold: AF is 4.6322e-06 in gnomAD v2.1 and 2.50785e-06 in gnomAD v4.1, both far below 1%.
BS1 Population frequency does not exceed the strong benign threshold: AF is 4.6322e-06 in gnomAD v2.1 and 2.50785e-06 in gnomAD v4.1, both far below 0.3%.
BS2 No evidence was identified showing this variant in well-phenotyped healthy adult individuals in a way that would strongly argue against pathogenicity.
BS3 No validated functional study demonstrating normal STK11 function for this specific variant was identified.
BS4 No non-segregation data were identified for this variant.
BP1 The reviewed evidence did not provide a sufficient gene-specific basis to apply BP1 to this missense variant.
BP2 No phase data or second-variant data were identified to support BP2.
BP5 No alternate molecular explanation for an affected individual's phenotype was identified.
BP6 ClinVar does not report this variant as benign or likely benign from a reputable source; the available submissions classify it as uncertain significance.
N/A · 5 PVS1 · PM3 · PM4 · BP3 · BP7
Research & evidence
Population frequency
gnomAD v4.1 screenshot
gnomAD v4.1
gnomAD v2.1 screenshot
gnomAD v2.1
v4.1
This variant is present in gnomAD v4.1 (AF= 2.50785e-06; MAF= 0.00025%, 4/1594994 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 3.41504e-06; MAF= 0.00034%, 4/1171290 alleles, homozygotes = 0); grpmax FAF= 8e-07.
v2.1
This variant is present in gnomAD v2.1 (AF= 4.6322e-06; MAF= 0.00046%, 1/215880 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 1.03814e-05; MAF= 0.00104%, 1/96326 alleles, homozygotes = 0).
Allele frequency by ancestry
three datasets · side by side
gnomAD v4.1
0.00025% · 4 / 1,594,994
0 hom · FAF 8e-05%
European (non-Finnish)
4 / 1,171,290
0.00034%
+ 9 not observed (Remaining individuals, Admixed American, European (Finnish), Amish, East Asian, Middle Eastern, South Asian, Ashkenazi Jewish, African/African American)
gnomAD v2.1
0.00046% · 1 / 215,880
0 hom
European (non-Finnish)
1 / 96,326
0.001%
+ 7 not observed (African/African American, Admixed American, Ashkenazi Jewish, East Asian, European (Finnish), Remaining individuals, South Asian)
ClinVar screenshot
ClinVar
This variant has been reported in ClinVar as Uncertain significance (4 clinical laboratories) and as Uncertain Significance (1 clinical laboratory).
SpliceAI screenshot
In silico
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.032. BayesDel score = -0.435498.
Functional / OncoKB screenshot
Functional Unknown Oncogenic Effect
OncoKB has not reviewed this specific variant; no variant-level oncogenicity or biological effect is available. Gene-level context: STK11, a tumor suppressor and intracellular kinase, is frequently mutated in lung cancer.
OncoKB ↗
COSMIC screenshot
COSMIC
Cancer hotspots screenshot
Cancer hotspots
Somatic evidence Not in COSMIC / hotspots
COSMIC
This variant does not lie in a statistically significant hotspot. This variant has not previously been reported in somatic cancers (COSMIC).
Hotspots
This variant does not lie in a statistically significant hotspot.
Sources & reference links
7Sources
ClinVar
gnomAD v2.1
gnomAD v4.1
SpliceAI
OncoKB
COSMIC
Cancer hotspots