O00329 (PK3CD_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 29, 2013.
Version 125.
History...
Names·Attributes·General annotation·Ontologies·Interactions·Alt products·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Interactions·Alt products·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit delta isoform Short name=PI3-kinase subunit delta Short name=PI3K-delta Short name=PI3Kdelta Short name=PtdIns-3-kinase subunit delta EC=2.7.1.153 Alternative name(s): Phosphatidylinositol 4,5-bisphosphate 3-kinase 110 kDa catalytic subunit delta Short name=PtdIns-3-kinase subunit p110-delta Short name=p110delta | ||
| Gene names |
| ||
| Organism | Homo sapiens (Human) [Reference proteome] | ||
| Taxonomic identifier | 9606 [NCBI] | ||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo![]() |
Protein attributes
| Sequence length | 1044 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Phosphoinositide-3-kinase (PI3K) that phosphorylates PftdIns(4,5)P2 (Phosphatidylinositol 4,5-bisphosphate) to generate phosphatidylinositol 3,4,5-trisphosphate (PIP3). PIP3 plays a key role by recruiting PH domain-containing proteins to the membrane, including AKT1 and PDPK1, activating signaling cascades involved in cell growth, survival, proliferation, motility and morphology. Mediates immune responses. Plays a role in B-cell development, proliferation, migration, and function. Required for B-cell receptor (BCR) signaling. Mediates B-cell proliferation response to anti-IgM, anti-CD40 and IL4 stimulation. Promotes cytokine production in response to TLR4 and TLR9. Required for antibody class switch mediated by TLR9. Involved in the antigen presentation function of B-cells. Involved in B-cell chemotaxis in response to CXCL13 and sphingosine 1-phosphate (S1P). Required for proliferation, signaling and cytokine production of naive, effector and memory T-cells. Required for T-cell receptor (TCR) signaling. Mediates TCR signaling events at the immune synapse. Activation by TCR leads to antigen-dependent memory T-cell migration and retention to antigenic tissues. Together with PIK3CG participates in T-cell development. Contributes to T-helper cell expansion and differentiation. Required for T-cell migration mediated by homing receptors SELL/CD62L, CCR7 and S1PR1 and antigen dependent recruitment of T-cells. Together with PIK3CG is involved in natural killer (NK) cell development and migration towards the sites of inflammation. Participates in NK cell receptor activation. Have a role in NK cell maturation and cytokine production. Together with PIK3CG is involved in neutrophil chemotaxis and extravasation. Together with PIK3CG participates in neutrophil respiratory burst. Have important roles in mast-cell development and mast cell mediated allergic response. Involved in stem cell factor (SCF)-mediated proliferation, adhesion and migration. Required for allergen-IgE-induced degranulation and cytokine release. The lipid kinase activity is required for its biological function. Isoform 2 may be involved in stabilizing total RAS levels, resulting in increased ERK phosphorylation and increased PI3K activity. Ref.4 Ref.10 |
| Catalytic activity | ATP + 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate = ADP + 1-phosphatidyl-1D-myo-inositol 3,4,5-trisphosphate. |
| Enzyme regulation | Activated by growth factors and cytokine receptors through a tyrosine-kinase-dependent mechanism. Activated by RAS. IC87114 inhibits lipid kinase activity and is selective in cells at doses up to 5-10 µM. IC87114 blocks T-cell receptor signaling in naive and memory T-cells and reduces cytokine production by memory T-cells. Ref.10 |
| Pathway | Phospholipid metabolism; phosphatidylinositol phosphate biosynthesis. |
| Subunit structure | Heterodimer of a catalytic subunit PIK3CD and a p85 regulatory subunit (PIK3R1, PIK3R2 or PIK3R3). Interacts with ERAS By similarity. Interacts with HRAS. Ref.4 |
| Subcellular location | |
| Tissue specificity | Isoform 2 is expressed in normal thymus, lung and spleen tissues, and is detected at low levels in normal lysates from colon and ovarian biopsies, at elevated levels in lysates from colorectal tumors and is abundantly expressed in some ovarian tumors (at protein level). Both isoform 1 and isoform 2 are widely expressed. Isoform 1 is expressed predominantly in leukocytes. Ref.4 |
| Post-translational modification | Autophosphorylation on Ser-1039 results in the almost complete inactivation of the lipid kinase activity. |
| Miscellaneous | IC87114 inhibitor reduces passive cutaneous anaphylaxis, attenuates allergic airway inflammation and hyperresponsiveness and allergen induced rhinitis response. Inhibitors may have therapeutic potential for the treatment of immune system-mediated diseases such as auto-immune diseases, inflammation and allergy (Ref.12; Ref.11). |
| Sequence similarities | Belongs to the PI3/PI4-kinase family. Contains 1 C2 PI3K-type domain. Contains 1 PI3K-ABD domain. Contains 1 PI3K-RBD domain. Contains 1 PI3K/PI4K domain. Contains 1 PIK helical domain. |
Ontologies
Binary interactions
With | Entry | #Exp. | IntAct | Notes |
|---|---|---|---|---|
| HRAS | P01112 | 2 | EBI-718309,EBI-350145 |
Alternative products
| This entry describes 2 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: O00329-1) Also known as: p110-delta; This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform 2 (identifier: O00329-2) Also known as: p37-delta; The sequence of this isoform differs from the canonical sequence as follows: 201-300: ESFTFQVSTK...NPAPQVQKPR → VSPCVACGIQ...GRLHAAGERQ 302-1044: Missing. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 1044 | 1044 | Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit delta isoform | PRO_0000088790 | |||||
Regions | |||||||||
| Domain | 16 – 105 | 90 | PI3K-ABD | ||||||
| Domain | 187 – 278 | 92 | PI3K-RBD | ||||||
| Domain | 319 – 476 | 158 | C2 PI3K-type | ||||||
| Domain | 497 – 674 | 178 | PIK helical | ||||||
| Domain | 774 – 1041 | 268 | PI3K/PI4K | ||||||
Amino acid modifications | |||||||||
| Modified residue | 524 | 1 | Phosphotyrosine Ref.9 | ||||||
| Modified residue | 1039 | 1 | Phosphoserine; by autocatalysis Ref.8 Ref.9 | ||||||
Natural variations | |||||||||
| Alternative sequence | 201 – 300 | 100 | ESFTF…VQKPR → VSPCVACGIQAALSMGSTSS VKLLSHPQAPLPQWHQMVFA RCLCMCGAQLNVPPGELHLP GVHQGRAAGADGLCPAEEGH SVPAAAGGAAGRLHAAGERQ in isoform 2. | VSP_044409 | |||||
| Alternative sequence | 302 – 1044 | 743 | Missing in isoform 2. | VSP_044410 | |||||
Experimental info | |||||||||
| Mutagenesis | 894 | 1 | R → P: Abolishes lipid and protein kinase activities. Ref.8 | ||||||
| Mutagenesis | 1039 | 1 | S → A: Abolishes autophosphorylation, no effect on lipid kinase activity. Ref.8 | ||||||
| Mutagenesis | 1039 | 1 | S → D or E: Abolishes autophosphorylation, reduced lipid kinase activity. Ref.8 | ||||||
| Sequence conflict | 253 | 1 | S → N in AAC25677. Ref.3 | ||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "P110delta, a novel phosphoinositide 3-kinase in leukocytes." Vanhaesebroeck B.A.M., Welham M.J., Kotani K., Stein R., Warne P.H., Zvelebil M.J., Higashi K., Volinia S., Downward J., Waterfield M.D. Proc. Natl. Acad. Sci. U.S.A. 94:4330-4335(1997) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). |
| [2] | Vanhaesebroeck B.A.M. Submitted (OCT-2003) to the EMBL/GenBank/DDBJ databases Cited for: SEQUENCE REVISION TO 675. |
| [3] | "p110delta, a novel phosphatidylinositol 3-kinase catalytic subunit that associates with p85 and is expressed predominantly in leukocytes." Chantry D., Vojtek A., Kashishian A., Holtzman D.A., Wood C., Gray P.W., Cooper J.A., Hoekstra M.F. J. Biol. Chem. 272:19236-19241(1997) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). |
| [4] | "p37delta is a new isoform of PI3K p110delta that increases cell proliferation and is overexpressed in tumors." Fransson S., Uv A., Eriksson H., Andersson M.K., Wettergren Y., Bergo M., Ejeskar K. Oncogene 31:3277-3286(2012) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 2), FUNCTION, SUBUNIT, INTERACTION WITH HRAS, SUBCELLULAR LOCATION, TISSUE SPECIFICITY. Tissue: Peripheral blood leukocyte. |
| [5] | "Variations in the human phosphoinositide-3-kinase p110 gene in children with primary B-cell immunodeficiency of unknown etiology." Jou S.-T., Chien Y.-H., Yang Y.-H., Shyur S.-D., Chou C.-C., Chiang B.-L. Submitted (OCT-2005) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [MRNA]. |
| [6] | "The DNA sequence and biological annotation of human chromosome 1." Gregory S.G., Barlow K.F., McLay K.E., Kaul R., Swarbreck D., Dunham A., Scott C.E., Howe K.L., Woodfine K., Spencer C.C.A., Jones M.C., Gillson C., Searle S., Zhou Y., Kokocinski F., McDonald L., Evans R., Phillips K. Bentley D.R.Nature 441:315-321(2006) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [7] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1). |
| [8] | "Autophosphorylation of p110 delta phosphoinositide 3-kinase: a new paradigm for the regulation of lipid kinases in vitro and in vivo." Vanhaesebroeck B., Higashi K., Raven C., Welham M., Anderson S., Brennan P., Ward S.G., Waterfield M.D. EMBO J. 18:1292-1302(1999) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 1031-1040, PHOSPHORYLATION AT SER-1039, MUTAGENESIS OF ARG-894 AND SER-1039. |
| [9] | "Large-scale proteomics analysis of the human kinome." Oppermann F.S., Gnad F., Olsen J.V., Hornberger R., Greff Z., Keri G., Mann M., Daub H. Mol. Cell. Proteomics 8:1751-1764(2009) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT TYR-524 AND SER-1039, MASS SPECTROMETRY. |
| [10] | "PI3K p110delta regulates T-cell cytokine production during primary and secondary immune responses in mice and humans." Soond D.R., Bjorgo E., Moltu K., Dale V.Q., Patton D.T., Torgersen K.M., Galleway F., Twomey B., Clark J., Gaston J.S.H., Tasken K., Bunyard P., Okkenhaug K. Blood 115:2203-2213(2010) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION IN T-CELLS, ENZYME REGULATION. |
| [11] | "PI3K delta and PI3K gamma: partners in crime in inflammation in rheumatoid arthritis and beyond?" Rommel C., Camps M., Ji H. Nat. Rev. Immunol. 7:191-201(2007) [PubMed] [Europe PMC] [Abstract] Cited for: REVIEW ON FUNCTION. |
| [12] | "Phosphoinositide 3-kinase delta (PI3Kdelta) in leukocyte signaling and function." Fung-Leung W.-P. Cell. Signal. 23:603-608(2011) [PubMed] [Europe PMC] [Abstract] Cited for: REVIEW ON FUNCTION. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | Y10055 mRNA. Translation: CAA71149.2. U86453 mRNA. Translation: AAC25677.1. JN190435 mRNA. Translation: AEK81610.1. DQ263594 mRNA. Translation: ABB83814.1. AL691449 Genomic DNA. Translation: CAI15703.1. BC132919 mRNA. Translation: AAI32920.1. BC132921 mRNA. Translation: AAI32922.1. |
| IPI | IPI00298410. |
| RefSeq | NP_005017.3. NM_005026.3. |
| UniGene | Hs.518451. |
3D structure databases | |
| ProteinModelPortal | O00329. |
| ModBase | Search... |
Protein-protein interaction databases | |
| IntAct | O00329. 8 interactions. |
| STRING | 9606.ENSP00000366563. |
PTM databases | |
| PhosphoSite | O00329. |
Proteomic databases | |
| PaxDb | O00329. |
| PRIDE | O00329. |
Protocols and materials databases | |
| DNASU | 5293. |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENST00000377346; ENSP00000366563; ENSG00000171608. |
| GeneID | 5293. |
| KEGG | hsa:5293. |
| UCSC | uc001aqb.4. human. |
Organism-specific databases | |
| CTD | 5293. |
| GeneCards | GC01P009711. |
| HGNC | HGNC:8977. PIK3CD. |
| HPA | CAB015420. |
| MIM | 602839. gene. |
| neXtProt | NX_O00329. |
| PharmGKB | PA33310. |
| GenAtlas | Search... |
Phylogenomic databases | |
| eggNOG | COG5032. |
| HOGENOM | HOG000252911. |
| HOVERGEN | HBG052721. |
| KO | K00922. |
| OrthoDB | EOG4XKV67. |
Enzyme and pathway databases | |
| BioCyc | MetaCyc:ENSG00000171608-MONOMER. |
| BRENDA | 2.7.1.137. 2681. |
| Pathway_Interaction_DB | pi3kcipathway. Class I PI3K signaling events. trail_pathway. TRAIL signaling pathway. |
| Reactome | REACT_111102. Signal Transduction. REACT_111217. Metabolism. REACT_116125. Disease. REACT_6900. Immune System. |
| SignaLink | O00329. |
| UniPathway | UPA00220. |
Gene expression databases | |
| ArrayExpress | O00329. |
| Bgee | O00329. |
| CleanEx | HS_PIK3CD. |
| Genevestigator | O00329. |
| GermOnline | ENSG00000171608. Homo sapiens. |
Family and domain databases | |
| Gene3D | 1.10.1070.11. 1 hit. 1.25.40.70. 1 hit. |
| InterPro | IPR016024. ARM-type_fold. IPR008973. C2_Ca/lipid-bd_dom_CaLB. IPR011009. Kinase-like_dom. IPR000403. PI3/4_kinase_cat_dom. IPR018936. PI3/4_kinase_CS. IPR003113. PI3K_adapt-bd_dom. IPR002420. PI3K_C2_dom. IPR000341. PI3K_Ras-bd_dom. IPR015433. PI_Kinase. IPR001263. PInositide-3_kin_accessory_dom. [Graphical view] |
| PANTHER | PTHR10048. PTHR10048. 1 hit. |
| Pfam | PF00454. PI3_PI4_kinase. 1 hit. PF00792. PI3K_C2. 1 hit. PF02192. PI3K_p85B. 1 hit. PF00794. PI3K_rbd. 1 hit. PF00613. PI3Ka. 1 hit. [Graphical view] |
| SMART | SM00142. PI3K_C2. 1 hit. SM00143. PI3K_p85B. 1 hit. SM00144. PI3K_rbd. 1 hit. SM00145. PI3Ka. 1 hit. SM00146. PI3Kc. 1 hit. [Graphical view] |
| SUPFAM | SSF48371. ARM-type_fold. 1 hit. SSF49562. C2_CaLB. 1 hit. SSF56112. Kinase_like. 1 hit. |
| PROSITE | PS00915. PI3_4_KINASE_1. 1 hit. PS00916. PI3_4_KINASE_2. 1 hit. PS50290. PI3_4_KINASE_3. 1 hit. PS51544. PI3K_ABD. 1 hit. PS51547. PI3K_C2. 1 hit. PS51546. PI3K_RBD. 1 hit. PS51545. PIK_HELICAL. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Other | |
| BindingDB | O00329. |
| ChEMBL | CHEMBL3130. |
| ChiTaRS | PIK3CD. human. |
| GenomeRNAi | 5293. |
| NextBio | 20454. |
| SOURCE | Search... |
Entry information
| Entry name | PK3CD_HUMAN | ||||||||
| Accession | Primary (citable) accession number: O00329 Secondary accession number(s): A6NCG0 Q5SR49 | ||||||||
| Entry history |
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| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
| Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. | ||||||||
Relevant documents
| Human chromosome 1 Human chromosome 1: entries, gene names and cross-references to MIM |
| MIM cross-references Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot |
| PATHWAY comments Index of metabolic and biosynthesis pathways |
| SIMILARITY comments Index of protein domains and families |

Clusters with
