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Gene | PIK3CA |
Variant | R38C |
Impact List | missense |
Protein Effect | gain of function |
Gene Variant Descriptions | PIK3CA R38C lies within the PI3K-ABD domain of the Pik3ca protein (UniProt.org). R38C confers a gain of function to Pik3ca, as indicated by increased phosphorylation of downstream targets Akt, GSK3-beta, FoxO1, FoxO3a, and S6 in cell culture (PMID: 18829572) and demonstrates increased transformation ability in two different cell lines, as compared to wild-type Pik3ca (PMID: 29533785). |
Associated Drug Resistance | |
Category Variants Paths |
PIK3CA mutant PIK3CA act mut PIK3CA R38C |
Transcript | NM_006218.4 |
gDNA | chr3:g.179198937C>T |
cDNA | c.112C>T |
Protein | p.R38C |
Source Database | RefSeq |
Genome Build | GRCh38/hg38 |
Transcript | gDNA | cDNA | Protein | Source Database | Genome Build |
---|---|---|---|---|---|
XM_006713658.5 | chr3:g.179198937C>T | c.112C>T | p.R38C | RefSeq | GRCh38/hg38 |
XM_006713658.4 | chr3:g.179198937C>T | c.112C>T | p.R38C | RefSeq | GRCh38/hg38 |
NM_006218 | chr3:g.179198937C>T | c.112C>T | p.R38C | RefSeq | GRCh38/hg38 |
NM_006218.4 | chr3:g.179198937C>T | c.112C>T | p.R38C | RefSeq | GRCh38/hg38 |
XM_011512894.2 | chr3:g.179198937C>T | c.112C>T | p.R38C | RefSeq | GRCh38/hg38 |
NM_006218.3 | chr3:g.179198937C>T | c.112C>T | p.R38C | RefSeq | GRCh38/hg38 |
XM_006713658 | chr3:g.179198937C>T | c.112C>T | p.R38C | RefSeq | GRCh38/hg38 |
XM_011512894 | chr3:g.179198937C>T | c.112C>T | p.R38C | RefSeq | GRCh38/hg38 |
Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
---|---|---|---|---|---|---|---|
PIK3CA R38C | head and neck squamous cell carcinoma | sensitive | Sulindac | Preclinical - Pdx | Actionable | In a preclinical study, Clinoril (sulindac) treatment reduced tumor growth rate in patient-derived xenograft (PDX) models of head and neck squamous cell carcinoma harboring PIK3CA mutations, including PIK3CA R38C (PMID: 30683736). | 30683736 |