About PTEN
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 uncertain. Select a step to read what it means.
Uncertain.The recorded classification is uncertain significance.
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 PTEN VCEP v3.2. 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.
Per PTEN VCEP specifications, PS3_Moderate is applied when phosphatase activity cumulative fitness score (Cum_score) ≤ -1.11 in the Mighell et al. 2018 (PMID:29706350) saturation mutagenesis assay. Y138C has a Cum_score of -1.766 in Table S2, meeting this threshold. Independently, Tibarewal et al. 2012 (PMID:22375056) directly characterized Y138C, demonstrating retained lipid phosphatase activity with selective loss of protein phosphatase activity and failure to suppress cellular invasion — consistent with a damaging functional effect.
Per PTEN VCEP specifications, PM2_Supporting is applied when the variant is absent from population databases at allele frequency < 0.00001 (0.001%). NM_000314.8:c.413A>G is absent from gnomAD v2.1, gnomAD v4.1, and gnomAD-Canada v1.0.
Per PTEN VCEP specifications, PP2 applies to missense variants in PTEN, a gene with a low rate of benign missense variation where missense variants are a common mechanism of disease. PTEN is a well-established tumor suppressor with an observed deficit of benign missense variation and an established role for missense mutations in PHTS.
Per PTEN VCEP specifications, PP3 is applied for missense variants when REVEL score > 0.7. The REVEL score for NM_000314.8:c.413A>G (p.Tyr138Cys) is 0.962, substantially exceeding the 0.7 threshold. BayesDel score is 0.518. SpliceAI max delta score is 0.00 (no predicted splicing impact).
No benign criterion marked as applied in the recorded assessment.
ClinGen PTEN Expert Panel Specifications to the ACMG/AMP Variant Interpretation Guidelines for PTEN Version 3.2 v3.2 criteria-combination framework was evaluated deterministically with applied criteria: PS3 moderate, PM2 supporting, PP2 supporting, PP3 supporting; no rule matched the adjudicated criteria.
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.
3 Uncertain significance · 1 Uncertain Significance. ClinVar API review status: criteria provided, multiple submitters, no conflicts.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. PTEN, a lipid and protein phosphatase, is one of the most frequently mutated genes in cancer.
This variant has previously been reported in somatic cancers (COSMIC; COSV64306562, n = 6 times).
This variant lies in a statistically significant hotspot.
ACMG/AMP criteria under ClinGen PTEN VCEP v3.2, with the data and sources behind each one.
26 criteria with recorded statuses: 4 met · 9 not met · 6 not assessed · 7 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_000314.8:c.413A>G (p.Tyr138Cys) is a missense variant in exon 5 of PTEN. It is absent from all population databases (gnomAD v2.1, v4.1, gnomAD-Canada), satisfying PM2_Supporting per PTEN VCEP criteria.
Functional evidence from Mighell et al. 2018 (PMID:29706350) saturation mutagenesis demonstrates that Y138C has a cumulative fitness score of -1.766, meeting the PTEN VCEP threshold of ≤ -1.11 for PS3_Moderate. Independently, Tibarewal et al. 2012 (PMID:22375056) characterized Y138C and demonstrated that it retains lipid phosphatase activity but selectively lacks protein phosphatase activity, with failure to suppress cellular invasion — confirming a damaging functional effect.
Computational evidence supports pathogenicity: REVEL score 0.962 (>0.7, meeting PP3 threshold per PTEN VCEP). PTEN has a low rate of benign missense variation and missense variants are a known disease mechanism for PTEN hamartoma tumor syndrome (PP2 per VCEP).
The variant is classified as Uncertain Significance in ClinVar (variation ID 486230) by all four submitting clinical laboratories. It has been observed in somatic cancers (COSMIC, n=6).
Applying the PTEN VCEP classification rules: 1 moderate pathogenic criterion (PS3_Moderate) and 3 supporting pathogenic criteria (PM2_Supporting, PP2, PP3) are met. No benign criteria are met. Per the VCEP combination rules, this evidence profile does not reach the Likely Pathogenic threshold (requires ≥3 moderate, or 2 moderate + ≥2 supporting, or 1 strong + 1 moderate, or 1 moderate + ≥4 supporting). The variant is classified as a Variant of Uncertain Significance (VUS).
Key gap: the Mighell et al. functional data for Y138C has a High_conf=False quality flag ('Fail Both'), indicating the measurement did not pass high-confidence filters. Additional functional validation, segregation data, de novo observations, or clinical case-level phenotype data could resolve this VUS.
No criteria match.
Every interpreted variant in PTEN, mapped onto the exon structure of NM_000314.8. 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 = 0.962. BayesDel score = 0.518367.
8 paper records listed. 1 cited in the classification.
we analyzed a PTEN Tyr138Cys (Y138C) mutant identified in a metastatic small cell lung cancer cell line, NCI-H196. When expressed, purified, and assayed in vitro, PTEN Y138C had catalytic properties like those of PTEN Y138L, displaying lipid phosphatase activity, but not protein phosphatase activity.
Location Results: 'A tumor-derived PTEN mutant...' section (pp. 5-7); Figure 6 and Figure 7
Context In vitro phosphatase assays with purified recombinant protein; lentiviral expression in PTEN-null U87MG glioblastoma cells; endogenous expression in NCI-H196 small cell lung cancer cells; Matrigel invasion assay; phosphospecific immunoblotting for Thr366
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 Uncertain significance (3 clinical laboratories) and as Uncertain Significance (1 clinical laboratory). (ClinVarID = 486230)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.00). REVEL score = 0.962. BayesDel score = 0.518367.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. PTEN, a lipid and protein phosphatase, is one of the most frequently mutated genes in cancer.
This variant lies in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV64306562, n = 6 times).
This variant lies in a statistically significant hotspot.