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Gene Gene information from NCBI Gene database.
Entrez ID 5290
Gene name Phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha
Gene symbol PIK3CA
Synonyms (NCBI Gene)
CCM4CLAPOCLOVECWS5HMHMCAPMCMMCMTCPI3KPI3K-alphap110-alpha
Chromosome 3
Chromosome location 3q26.32
Summary Phosphatidylinositol 3-kinase is composed of an 85 kDa regulatory subunit and a 110 kDa catalytic subunit. The protein encoded by this gene represents the catalytic subunit, which uses ATP to phosphorylate PtdIns, PtdIns4P and PtdIns(4,5)P2. This gene has
SNPs SNP information provided by dbSNP.
69 Show/Hide all (69)
SNP ID Visualize variation Clinical significance Consequence
rs104886003 G>A,C Pathogenic, pathogenic-likely-pathogenic, likely-pathogenic, drug-response, not-provided Missense variant, coding sequence variant
rs121913272 T>C,G Pathogenic, likely-pathogenic Missense variant, coding sequence variant
rs121913273 G>A,C Pathogenic, likely-pathogenic Missense variant, coding sequence variant
rs121913274 A>C,G,T Pathogenic, pathogenic-likely-pathogenic, likely-pathogenic Missense variant, coding sequence variant
rs121913275 G>A,C,T Pathogenic, likely-pathogenic, likely-benign Missense variant, synonymous variant, coding sequence variant
miRNA miRNA information provided by mirtarbase database.
72 Show/Hide all (72)
miRTarBase ID miRNA Experiments Reference
MIRT006837 hsa-miR-124-3p Luciferase reporter assayqRT-PCRWestern blot 22940133
MIRT006837 hsa-miR-124-3p Luciferase reporter assayqRT-PCRWestern blot 22940133
MIRT007316 hsa-miR-148b-3p Western blot 23238785
MIRT007316 hsa-miR-148b-3p Western blot 23238785
MIRT017306 hsa-miR-335-5p Microarray 18185580
Transcription factors Transcription factors information provided by TRRUST V2 database.
2
Transcription factor Regulation Reference
FOXO3 Unknown 19299143
HIF1A Unknown 23060442
Gene ontology (GO) Gene Ontology (GO) annotations describing the biological processes, molecular functions, and cellular components associated with a gene.
97 Show/Hide all (97)
GO ID Ontology Definition Evidence Reference
GO:0000166 Function Nucleotide binding IEA
GO:0001525 Process Angiogenesis IEA
GO:0001889 Process Liver development IEA
GO:0001944 Process Vasculature development TAS 19200708
GO:0004674 Function Protein serine/threonine kinase activity IEA
Other IDs Other IDs provides unique identifiers for this gene in OMIM, HGNC, and Ensembl databases.
MIM HGNC e!Ensembl
171834 8975 ENSG00000121879
Protein Protein information from UniProt database.
UniProt ID Unique identifier for the protein in the UniProt database. Click to view detailed protein information.
P42336
Protein name Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform (PI3-kinase subunit alpha) (PI3K-alpha) (PI3Kalpha) (PtdIns-3-kinase subunit alpha) (EC 2.7.1.137) (EC 2.7.1.153) (Phosphatidylinositol 4,5-bisphosphate 3-kinase 110 kDa cataly
Protein function Phosphoinositide-3-kinase (PI3K) phosphorylates phosphatidylinositol (PI) and its phosphorylated derivatives at position 3 of the inositol ring to produce 3-phosphoinositides (PubMed:15135396, PubMed:23936502, PubMed:28676499). Uses ATP and PtdI
PDB 2ENQ , 2RD0 , 3HHM , 3HIZ , 3ZIM , 4JPS , 4L1B , 4L23 , 4L2Y , 4OVU , 4OVV , 4TUU , 4TV3 , 4WAF , 4YKN , 4ZOP , 5DXH , 5DXT , 5FI4 , 5ITD , 5SW8 , 5SWG , 5SWO , 5SWP , 5SWR , 5SWT , 5SX8 , 5SX9 , 5SXA , 5SXB , 5SXC , 5SXD , 5SXE , 5SXF , 5SXI , 5SXJ , 5SXK , 5UBR , 5UK8 , 5UKJ , 5UL1 , 5XGH , 5XGI , 5XGJ , 6GVF , 6GVG , 6GVH , 6GVI , 6NCT , 6OAC , 6PYS
Family and domains

Pfam

Accession ID Position in sequence Description Type
PF00454 PI3_PI4_kinase 796 → 1015 Phosphatidylinositol 3- and 4-kinase Family
PF00613 PI3Ka 519 → 704 Phosphoinositide 3-kinase family, accessory domain (PIK domain) Family
PF00792 PI3K_C2 350 → 485 Phosphoinositide 3-kinase C2 Domain
PF00794 PI3K_rbd 173 → 292 PI3-kinase family, ras-binding domain Domain
PF02192 PI3K_p85B 32 → 107 PI3-kinase family, p85-binding domain Family
Sequence
MPPRPSSGELWGIHLMPPRILVECLLPNGMIVTLECLREATLITIKHELFKEARKYPLHQ
LLQDESSYIFVSVTQEAEREEFFDETRRLCDLRLFQPFLKVIEPVGN
REEKILNREIGFA
IGMPVCEFDMVKDPEVQDFRRNILNVCKEAVDLRDLNSPHSRAMYVYPPNVESSPELPKH
IYNKLDKGQIIVVIWVIVSPNNDKQKYTLKINHDCVPEQVIAEAIRKKTRSMLLSSEQLK
LCVLEYQGKYILKVCGCDEYFLEKYPLSQYKYIRSCIMLGRMPNLMLMAKES
LYSQLPMD
CFTMPSYSRRISTATPYMNGETSTKSLWVINSALRIKILCATYVNVNIRDIDKIYVRTGI
YHGGEPLCDNVNTQRVPCSNPRWNEWLNYDIYIPDLPRAARLCLSICSVKGRKGAKEEHC
PLAWGNINLFDYTDTLVSGKMALNLWPVPHGLEDLLNPIGVTGSNPNKETPCLELEFDWF
SSVVK
FPDMSVIEEHANWSVSREAGFSYSHAGLSNRLARDNELRENDKEQLKAISTRDPL
SEITEQEKDFLWSHRHYCVTIPEILPKLLLSVKWNSRDEVAQMYCLVKDWPPIKPEQAME
LLDCNYPDPMVRGFAVRCLEKYLTDDKLSQYLIQLVQVLKYEQYLDNLLVRFLLKKALTN
QRIGHFFFWHLKSEMHNKTVSQRFGLLLESYCRACGMYLKHLNR
QVEAMEKLINLTDILK
QEKKDETQKVQMKFLVEQMRRPDFMDALQGFLSPLNPAHQLGNLRLEECRIMSSAKRPLW
LNWENPDIMSELLFQNNEIIFKNGDDLRQDMLTLQIIRIMENIWQNQGLDLRMLPYGCLS
IGDCVGLIEVVRNSHTIMQIQCKGGLKGALQFNSHTLHQWLKDKNKGEIYDAAIDLFTRS
CAGYCVATFILGIGDRHNSNIMVKDDGQLFHIDFGHFLDHKKKKFGYKRERVPFVLTQDF
LIVISKGAQECTKTREFERFQEMCYKAYLAIRQHANLFINLFSMMLGSGMPELQS
FDDIA
YIRKTLALDKTEQEALEYFMKQMNDAHHGGWTTKMDWIFHTIKQHALN
Sequence length 1068
Interactions View interactions
Pathways Pathway information has different metabolic/signaling pathways associated with genes.
KEGG Pathway Reactome Pathway
Inositol phosphate metabolism PI3K Cascade
Metabolic pathways IRS-mediated signalling
EGFR tyrosine kinase inhibitor resistance GPVI-mediated activation cascade
Endocrine resistance Constitutive Signaling by Ligand-Responsive EGFR Cancer Variants
Platinum drug resistance PI3K events in ERBB4 signaling
ErbB signaling pathway PIP3 activates AKT signaling
Ras signaling pathway Signaling by SCF-KIT
Rap1 signaling pathway Synthesis of PIPs at the plasma membrane
cAMP signaling pathway GAB1 signalosome
Chemokine signaling pathway Signaling by cytosolic FGFR1 fusion mutants
HIF-1 signaling pathway Downstream signal transduction
FoxO signaling pathway PI3K events in ERBB2 signaling
Phosphatidylinositol signaling system PI3K/AKT activation
Sphingolipid signaling pathway Downstream TCR signaling
Phospholipase D signaling pathway Role of phospholipids in phagocytosis
Hormone signaling Tie2 Signaling
Autophagy - animal Constitutive Signaling by Aberrant PI3K in Cancer
mTOR signaling pathway DAP12 signaling
PI3K-Akt signaling pathway Role of LAT2/NTAL/LAB on calcium mobilization
AMPK signaling pathway Costimulation by the CD28 family
Apoptosis CD28 dependent PI3K/Akt signaling
Longevity regulating pathway G alpha (q) signalling events
Longevity regulating pathway - multiple species VEGFA-VEGFR2 Pathway
Cellular senescence Interleukin-3, Interleukin-5 and GM-CSF signaling
Axon guidance Constitutive Signaling by EGFRvIII
VEGF signaling pathway PI-3K cascade:FGFR1
Osteoclast differentiation PI-3K cascade:FGFR2
Focal adhesion PI-3K cascade:FGFR3
Signaling pathways regulating pluripotency of stem cells PI-3K cascade:FGFR4
Platelet activation Signaling by FGFR2 in disease
Neutrophil extracellular trap formation Signaling by FGFR4 in disease
Toll-like receptor signaling pathway Signaling by FGFR1 in disease
C-type lectin receptor signaling pathway PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling
JAK-STAT signaling pathway MET activates PI3K/AKT signaling
Natural killer cell mediated cytotoxicity Signaling by FGFR3 fusions in cancer
T cell receptor signaling pathway Signaling by FGFR3 point mutants in cancer
B cell receptor signaling pathway RET signaling
Fc epsilon RI signaling pathway Extra-nuclear estrogen signaling
Fc gamma R-mediated phagocytosis Erythropoietin activates Phosphoinositide-3-kinase (PI3K)
TNF signaling pathway Interleukin receptor SHC signaling
Leukocyte transendothelial migration Regulation of signaling by CBL
Neurotrophin signaling pathway Signaling by ERBB2 KD Mutants
Cholinergic synapse Signaling by ERBB2 ECD mutants
Inflammatory mediator regulation of TRP channels Signaling by PDGFRA transmembrane, juxtamembrane and kinase domain mutants
Regulation of actin cytoskeleton Signaling by PDGFRA extracellular domain mutants
Insulin signaling pathway  
Progesterone-mediated oocyte maturation  
Estrogen signaling pathway  
Prolactin signaling pathway  
Thyroid hormone signaling pathway  
Regulation of lipolysis in adipocytes  
Relaxin signaling pathway  
GnRH secretion  
Type II diabetes mellitus  
Insulin resistance  
Non-alcoholic fatty liver disease  
AGE-RAGE signaling pathway in diabetic complications  
Growth hormone synthesis, secretion and action  
Aldosterone-regulated sodium reabsorption  
Carbohydrate digestion and absorption  
Alzheimer disease  
Spinocerebellar ataxia  
Prion disease  
Bacterial invasion of epithelial cells  
Shigellosis  
Salmonella infection  
Yersinia infection  
Chagas disease  
Amoebiasis  
Hepatitis C  
Hepatitis B  
Measles  
Human cytomegalovirus infection  
Influenza A  
Human papillomavirus infection  
Human T-cell leukemia virus 1 infection  
Kaposi sarcoma-associated herpesvirus infection  
Herpes simplex virus 1 infection  
Epstein-Barr virus infection  
Human immunodeficiency virus 1 infection  
Coronavirus disease - COVID-19  
Pathways in cancer  
Viral carcinogenesis  
Proteoglycans in cancer  
MicroRNAs in cancer  
Chemical carcinogenesis - receptor activation  
Chemical carcinogenesis - reactive oxygen species  
Colorectal cancer  
Renal cell carcinoma  
Pancreatic cancer  
Endometrial cancer  
Glioma  
Prostate cancer  
Melanoma  
Chronic myeloid leukemia  
Acute myeloid leukemia  
Small cell lung cancer  
Non-small cell lung cancer  
Breast cancer  
Hepatocellular carcinoma  
Gastric cancer  
Central carbon metabolism in cancer  
Choline metabolism in cancer  
PD-L1 expression and PD-1 checkpoint pathway in cancer  
Diabetic cardiomyopathy  
Lipid and atherosclerosis  
Fluid shear stress and atherosclerosis  
Associated diseases Disease associations from ClinVar (causal & non-causal) and other databases (OMIM, Orphanet, GWAS, etc.).
154
Evidence Score: ★☆☆☆☆  Gene-disease association found in Text Mining only ★★☆☆☆  Found in Text Mining and Unknown/Other Associations ★★★☆☆  Reported in Unknown/Other Associations across ≥2 Sources ★★★★☆  ClinVar: Pathogenic/Likely Pathogenic (<5 Variants) ★★★★★  ClinVar: Pathogenic/Likely Pathogenic (≥5 Variants)
Causal Diseases associated with Pathogenic or Likely Pathogenic variants in ClinVar
Show/Hide Causal Diseases (90)
Phenotype Name Clinical Significance dbSNP ID RCV Accession Evidence Score
Abnormal cardiovascular system morphology Pathogenic; Likely pathogenic rs121913279, rs104886003, rs121913274, rs121913284, rs121913288, rs1057519925, rs1057519929, rs121913273, rs121913272, rs587776932, rs397517201 RCV001327968
RCV001327963
RCV001327964
RCV001327959
RCV001327967
View all (6 more)
★★★★★
★★★★★
ClinVar: Pathogenic / Likely Pathogenic (≥5 Variants)
Abnormal cerebral morphology Pathogenic rs121913287, rs587776932 RCV002275002
RCV002274888
★★★★★
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Abnormality of the hairline Pathogenic rs1057519942 RCV000852337
★★★★★
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Adenocarcinoma of the large intestine Likely pathogenic; Pathogenic rs104886003 RCV006253574
★★★★★
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Unknown / Other Associations ClinVar entries with uncertain/conflicting evidence, and associations from other databases (OMIM, Orphanet, GWAS, etc.) where the gene is not established as causal.
Show/Hide Unknown Diseases (64)
Phenotype Name Clinical Significance Source Reference Evidence Score
Adrenal cortex carcinoma - ClinVar —
★★★★★
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
BECKWITH-WIEDEMANN SYNDROME — Disgenet —
★★★★★
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
BREAST CANCER — HPO —
★★★★★
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
BREAST NEOPLASMS — CTD 19196980, 19685490, 20479250, 21633166, 22370636, 25267515, 25358515, 26587011
★★★★★
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Associations from Text Mining Disease associations identified through text mining
Show/Hide Text Mining Associations (1255)
Disease Name Disease (Merged) Source PMID Relationship Type Evidence Score
2-4 toe syndactyly Syndactyly Of The Toes HPO_DG
★★★★★
★☆☆☆☆
Found in Text Mining only
Acoustic Neuroma Acoustic Neuroma BEFREE 28737257
★★★★★
★☆☆☆☆
Found in Text Mining only
Actinic keratosis Actinic keratosis BEFREE 27299186
★★★★★
★☆☆☆☆
Found in Text Mining only
ACTIVATED PI3K-DELTA SYNDROME ACTIVATED PI3K-DELTA SYNDROME BEFREE 27116393, 27616589, 28167755, 28842185, 29556229, 30116245, 31031754
★★★★★
★☆☆☆☆
Found in Text Mining only
Acute Erythroblastic Leukemia Erythroblastic Leukemia BEFREE 20445019
★★★★★
★☆☆☆☆
Found in Text Mining only
Acute leukemia Leukemia BEFREE 12556562, 15608678, 16115127, 23705826, 24966925, 30639430, 31412710
★★★★★
★☆☆☆☆
Found in Text Mining only
Acute lymphocytic leukemia Lymphocytic Leukemia BEFREE 18483299, 18665177, 22685175, 23958920, 24244612, 26080839, 27018341, 28125433, 28159681, 28295182, 29179029, 29574283, 30669372, 30795552, 31705930
★★★★★
★☆☆☆☆
Found in Text Mining only
Acute monocytic leukemia Monocytic Leukemia BEFREE 26999641, 29143813, 29276026, 29559471, 31217869
★★★★★
★☆☆☆☆
Found in Text Mining only
Acute pancreatitis Pancreatitis BEFREE 29620213, 30694771, 31414732, 31531867
★★★★★
★☆☆☆☆
Found in Text Mining only
Acute Promyelocytic Leukemia Promyelocytic Leukemia BEFREE 18491231, 24676995, 27840989, 30316766, 31032633
★★★★★
★☆☆☆☆
Found in Text Mining only