Q5RAY1 (P3C2A_PONAB) Reviewed, UniProtKB/Swiss-Prot
Last modified
March 6, 2013.
Version 65.
History...
Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Phosphatidylinositol 4-phosphate 3-kinase C2 domain-containing subunit alpha Short name=PI3K-C2-alpha Short name=PtdIns-3-kinase C2 subunit alpha EC=2.7.1.154 Alternative name(s): Phosphoinositide 3-kinase-C2-alpha | ||
| Gene names |
| ||
| Organism | Pongo abelii (Sumatran orangutan) (Pongo pygmaeus abelii) [Reference proteome] | ||
| Taxonomic identifier | 9601 [NCBI] | ||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Pongo![]() |
Protein attributes
| Sequence length | 1685 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at transcript level |
General annotation (Comments)
| Function | Generates phosphatidylinositol 3-phosphate (PtdIns3P) and phosphatidylinositol 3,4-bisphosphate (PtdIns(3,4)P2) that act as second messengers. Has a role in several intracellular trafficking events. Functions in insulin signaling and secretion. Required for translocation of the glucose transporter SLC2A4/GLUT4 to the plasma membrane and glucose uptake in response to insulin-mediated RHOQ activation. Regulates insulin secretion through two different mechanisms: involved in glucose-induced insulin secretion downstream of insulin receptor in a pathway that involves AKT1 activation and TBC1D4/AS160 phosphorylation, and participates in the late step of insulin granule exocytosis probably in insulin granule fusion. Synthesizes PtdIns3P in response to insulin signaling. Functions in clathrin-coated endocytic vesicle formation and distribution. Regulates dynamin-independent endocytosis, probably by recruiting EEA1 to internalizing vesicles. In neurosecretory cells synthesizes PtdIns3P on large dense core vesicles. Participates in calcium induced contraction of vascular smooth muscle by regulating myosin light chain (MLC) phosphorylation through a mechanism involving Rho kinase-dependent phosphorylation of the MLCP-regulatory subunit MYPT1. May play a role in the EGF signaling cascade. May be involved in mitosis and UV-induced damage response. Required for maintenance of normal renal structure and function by supporting normal podocyte function By similarity. |
| Catalytic activity | ATP + 1-phosphatidyl-1D-myo-inositol 4-phosphate = ADP + 1-phosphatidyl-1D-myo-inositol 3,4-bisphosphate. |
| Cofactor | Calcium or magnesium. Manganese cannot be used By similarity. |
| Enzyme regulation | Only slightly inhibited by wortmannin and LY294002. Activated by clathrin and insulin By similarity. |
| Subunit structure | Part of a complex with ERBB2 and EGFR. Interacts with clathrin trimers By similarity. |
| Subcellular location | Cell membrane. Golgi apparatus. Cytoplasmic vesicle › clathrin-coated vesicle. Nucleus. Cytoplasm By similarity. |
| Post-translational modification | Phosphorylated on Ser-259 during mitosis and upon UV irradiation; which does not change enzymatic activity but leads to proteasomal degradation. Phosphorylated upon insulin stimulation; which may lead to enzyme activation By similarity. |
| Sequence similarities | Belongs to the PI3/PI4-kinase family. Contains 1 C2 domain. Contains 1 C2 PI3K-type domain. Contains 1 PI3K-RBD domain. Contains 1 PI3K/PI4K domain. Contains 1 PIK helical domain. Contains 1 PX (phox homology) domain. |
Ontologies
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 1685 | 1685 | Phosphatidylinositol 4-phosphate 3-kinase C2 domain-containing subunit alpha | PRO_0000088797 | |||||
Regions | |||||||||
| Domain | 419 – 507 | 89 | PI3K-RBD | ||||||
| Domain | 680 – 839 | 160 | C2 PI3K-type | ||||||
| Domain | 859 – 1035 | 177 | PIK helical | ||||||
| Domain | 1131 – 1395 | 265 | PI3K/PI4K | ||||||
| Domain | 1420 – 1536 | 117 | PX | ||||||
| Domain | 1558 – 1661 | 104 | C2 | ||||||
| Region | 1 – 142 | 142 | Interaction with clathrin; sufficient to induce clathrin assemby By similarity | ||||||
| Region | 1486 – 1491 | 6 | Interaction with PtdIns(4,5)P2-containing membranes By similarity | ||||||
| Motif | 1607 – 1618 | 12 | Nuclear localization signal By similarity | ||||||
Amino acid modifications | |||||||||
| Modified residue | 60 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 108 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 259 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 327 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 338 | 1 | Phosphoserine By similarity | ||||||
Sequences
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References
| [1] | The German cDNA consortium Submitted (NOV-2004) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. Tissue: Kidney. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | CR858880 mRNA. Translation: CAH91079.1. |
| RefSeq | NP_001125626.1. NM_001132154.1. |
| UniGene | Pab.799. |
3D structure databases | |
| ProteinModelPortal | Q5RAY1. |
| SMR | Q5RAY1. Positions 1419-1530, 1560-1681. |
| ModBase | Search... |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| GeneID | 100457125. |
| KEGG | pon:100457125. |
Organism-specific databases | |
| CTD | 5286. |
Phylogenomic databases | |
| HOVERGEN | HBG082099. |
| InParanoid | Q5RAY1. |
| KO | K00923. |
Family and domain databases | |
| Gene3D | 1.10.1070.11. 1 hit. 1.25.40.70. 1 hit. 3.30.1520.10. 1 hit. |
| InterPro | IPR016024. ARM-type_fold. IPR000008. C2_Ca-dep. IPR008973. C2_Ca/lipid-bd_dom_CaLB. IPR018029. C2_membr_targeting. IPR011009. Kinase-like_dom. IPR001683. Phox. IPR000403. PI3/4_kinase_cat_dom. IPR018936. PI3/4_kinase_CS. 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 | PF00168. C2. 1 hit. PF00454. PI3_PI4_kinase. 1 hit. PF00792. PI3K_C2. 1 hit. PF00794. PI3K_rbd. 1 hit. PF00613. PI3Ka. 1 hit. PF00787. PX. 1 hit. [Graphical view] |
| SMART | SM00239. C2. 2 hits. SM00142. PI3K_C2. 1 hit. SM00144. PI3K_rbd. 1 hit. SM00145. PI3Ka. 1 hit. SM00146. PI3Kc. 1 hit. SM00312. PX. 1 hit. [Graphical view] |
| SUPFAM | SSF48371. ARM-type_fold. 1 hit. SSF49562. C2_CaLB. 2 hits. SSF56112. Kinase_like. 1 hit. SSF64268. PX. 1 hit. |
| PROSITE | PS50004. C2. 1 hit. PS00915. PI3_4_KINASE_1. 1 hit. PS00916. PI3_4_KINASE_2. 1 hit. PS50290. PI3_4_KINASE_3. 1 hit. PS51547. PI3K_C2. 1 hit. PS51546. PI3K_RBD. 1 hit. PS51545. PIK_HELICAL. 1 hit. PS50195. PX. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Entry information
| Entry name | P3C2A_PONAB | ||||||||
| Accession | Primary (citable) accession number: Q5RAY1 | ||||||||
| Entry history |
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| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
Relevant documents
| SIMILARITY comments Index of protein domains and families |

Clusters with
