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Gene PIK3CA
Variant E545X
Impact List missense
Protein Effect unknown
Gene Variant Descriptions PIK3CA E545X indicates any Pik3ca missense mutation that results in the replacement of the glutamic acid (E) at amino acid 545 by a different amino acid. PIK3CA E545X mutations are hotspot mutations that may result in increased Pik3ca kinase activity (PMID: 15930273).
Associated Drug Resistance
Category Variants Paths

PIK3CA mutant PIK3CA exon10 PIK3CA E545X

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Transcript NM_006218.4
gDNA chr3:g.179218303_179218305
cDNA c.1633_1635
Protein p.E545
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
XM_011512894.2 chr3:g.179218303_179218305 c.1633_1635 p.E545 RefSeq GRCh38/hg38
XM_006713658.5 chr3:g.179218303_179218305 c.1633_1635 p.E545 RefSeq GRCh38/hg38
XM_006713658 chr3:g.179218303_179218305 c.1633_1635 p.E545 RefSeq GRCh38/hg38
XM_006713658.4 chr3:g.179218303_179218305 c.1633_1635 p.E545 RefSeq GRCh38/hg38
NM_006218.3 chr3:g.179218303_179218305 c.1633_1635 p.E545 RefSeq GRCh38/hg38
NM_006218.4 chr3:g.179218303_179218305 c.1633_1635 p.E545 RefSeq GRCh38/hg38
XM_011512894 chr3:g.179218303_179218305 c.1633_1635 p.E545 RefSeq GRCh38/hg38
NM_006218 chr3:g.179218303_179218305 c.1633_1635 p.E545 RefSeq GRCh38/hg38

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Clinical Trial Phase Therapies Title Recruitment Status Covered Countries Other Countries
NCT05768139 Phase Ib/II Fulvestrant + STX-478 STX-478 First-in-Human Study of STX-478 as Monotherapy and in Combination With Other Antineoplastic Agents in Participants With Advanced Solid Tumors Recruiting USA | ITA | FRA | ESP 0
NCT05154487 Phase II Alpelisib + Fulvestrant A Study of Alpelisib and Fulvestrant to Treat Endometrial Cancer Recruiting USA 0
NCT04586335 Phase I CYH33 + Olaparib Study of CYH33 in Combination With Olaparib an Oral PARP Inhibitor in Patients With Advanced Solid Tumors. Terminated USA | AUS 1
NCT03842228 Phase I Copanlisib + Durvalumab + Olaparib Testing the Combination of the Anti-cancer Drugs Copanlisib, Olaparib, and MEDI4736 (Durvalumab) in Patients With Advanced Solid Tumors With Selected Mutations Active, not recruiting USA 0