<?xml version="1.0" encoding="UTF-8"?>
<protein>
  <version>1.0</version>
  <creation_date>2018-05-07 22:24:35 UTC</creation_date>
  <update_date>2020-05-20 21:05:04 UTC</update_date>
  <accession>BMDBP00915</accession>
  <secondary_accessions>
  </secondary_accessions>
  <protein_type>Enzyme</protein_type>
  <synonyms>
  </synonyms>
  <gene_name>PIK3R1</gene_name>
  <general_function>Replication, recombination and repair</general_function>
  <specific_function>Binds to activated (phosphorylated) protein-Tyr kinases, through its SH2 domain, and acts as an adapter, mediating the association of the p110 catalytic unit to the plasma membrane. Necessary for the insulin-stimulated increase in glucose uptake and glycogen synthesis in insulin-sensitive tissues. Plays an important role in signaling in response to FGFR1, FGFR2, FGFR3, FGFR4, KITLG/SCF, KIT, PDGFRA and PDGFRB. Likewise, plays a role in ITGB2 signaling. Modulates the cellular response to ER stress by promoting nuclear translocation of XBP1 in a ER stress- and/or insulin-dependent manner during metabolic overloading in the liver and hence plays a role in glucose tolerance improvement (By similarity).</specific_function>
  <pathways>
    <pathway>
      <name>Fc Epsilon Receptor I Signaling in Mast Cells</name>
      <smpdb_id>SMP0108186</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Phosphatidylinositol Phosphate Metabolism</name>
      <smpdb_id>SMP0087258</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>T Cell Receptor Signaling Pathway </name>
      <smpdb_id>SMP0120935</smpdb_id>
      <kegg_map_id/>
    </pathway>
  </pathways>
  <metabolite_associations>
    <metabolite>
      <accession>BMDB0000122</accession>
      <name>D-Glucose</name>
    </metabolite>
    <metabolite>
      <accession>BMDB0000158</accession>
      <name>L-Tyrosine</name>
    </metabolite>
    <metabolite>
      <accession>BMDB0000757</accession>
      <name>Glycogen</name>
    </metabolite>
  </metabolite_associations>
  <go_classifications>
  </go_classifications>
  <subcellular_locations>
  </subcellular_locations>
  <gene_properties>
    <chromosome_location>20</chromosome_location>
    <locus/>
    <gene_sequence/>
  </gene_properties>
  <protein_properties>
    <residue_number>724</residue_number>
    <molecular_weight>83497.0</molecular_weight>
    <theoretical_pi>6.03</theoretical_pi>
    <pfams>
    </pfams>
    <transmembrane_regions>
    </transmembrane_regions>
    <signal_regions>
      <region>None</region>
    </signal_regions>
    <polypeptide_sequence>&gt;Phosphatidylinositol 3-kinase regulatory subunit alpha
MSAEGYQYRALYDYKKEREEDIDLHLGDILTVNKGSLVALGFSDGQEAKPEEIGWLNGYN
ETTGERGDFPGTYVEYIGRKKISPPTPKPRPPRPLPVAPGPSKTEADSEQQASTLPDLAE
QFAPPDVAPPLLIKLVEAIEKKGLECSTLYRTQSSSNPAELRQLLDCDTASLDLEMFDVH
VLADAFKRYLLDLPNPVIPVAVSSELISLAPEVQSSEEYIQLLKKLIRSPSIPHQYWLTL
QYLLKHFFKLSQTSSKNLLNARVLSELFSPLLFRFPAASSENTEHLIKIIEILISTEWNE
RQPAPALPPKPPKPTTVANNGMNNNMSLQDAEWYWGDISREEVNEKLRDTADGTFLVRDA
STKMHGDYTLTLRKGGNNKLIKIFHRDGKYGFSDPLTFNSVVELINHYRNESLAQYNPKL
DVKLLYPVSKYQQDQVVKEDNIEAVGKKLHEYNTQFQEKSREYDRLYEDYTRTSQEIQMK
RTAIEAFNETIKIFEEQCQTQERYSKEYIEKFKREGNETEIQRIMHNYEKLKSRISEIVD
SRRRLEEDLKKQAAEYREIDKRMNSIKPDLIQLRKTRDQYLMWLTQKGVRQKKLNEWLGN
ENTEDQYSLVEDDEDLPHHDEKTWNVGSSNRNKAENLLRGKRDGTFLVRESSKQGCYACS
VVVDGEVKHCVINKTATGYGFAEPYNLYSSLKELVLHYQHTSLVQHNDSLNVTLAYPVYA
QQRR</polypeptide_sequence>
  </protein_properties>
  <genbank_protein_id>AAA79511.1</genbank_protein_id>
  <uniprot_id>P23727</uniprot_id>
  <uniprot_name>P85A_BOVIN</uniprot_name>
  <pdb_ids>
    <pdb_id>1BFI</pdb_id>
    <pdb_id>1BFJ</pdb_id>
    <pdb_id>1OO3</pdb_id>
    <pdb_id>1OO4</pdb_id>
    <pdb_id>1PNJ</pdb_id>
    <pdb_id>1QAD</pdb_id>
    <pdb_id>2PNA</pdb_id>
    <pdb_id>2PNB</pdb_id>
    <pdb_id>2PNI</pdb_id>
    <pdb_id>5DXH</pdb_id>
    <pdb_id>5DXU</pdb_id>
    <pdb_id>5T8F</pdb_id>
    <pdb_id>6D81</pdb_id>
    <pdb_id>6D82</pdb_id>
    <pdb_id>6D85</pdb_id>
    <pdb_id>6D86</pdb_id>
    <pdb_id>6D87</pdb_id>
    <pdb_id>6G6W</pdb_id>
    <pdb_id>6MRP</pdb_id>
    <pdb_id>6OCO</pdb_id>
    <pdb_id>6OCU</pdb_id>
    <pdb_id>6R4R</pdb_id>
    <pdb_id>1BFI</pdb_id>
    <pdb_id>1OO3</pdb_id>
    <pdb_id>1OO4</pdb_id>
    <pdb_id>1PNJ</pdb_id>
    <pdb_id>1QAD</pdb_id>
    <pdb_id>2PNA</pdb_id>
    <pdb_id>5DXU</pdb_id>
    <pdb_id>6D85</pdb_id>
    <pdb_id>6R4R</pdb_id>
  </pdb_ids>
  <genbank_gene_id>M61745</genbank_gene_id>
  <genecard_id>PIK3R1</genecard_id>
  <geneatlas_id/>
  <general_references>
  </general_references>
  <metabolite_references>
  </metabolite_references>
</protein>
