Ire1: Difference between revisions
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<StructureSection load='3lj0' size='400' side='right' caption='Structure of yeast Ire1 cytoplasmic domain dimer complex with quercetin, ADP | <StructureSection load='3lj0' size='400' side='right' caption='Structure of yeast Ire1 cytoplasmic domain dimer complex with quercetin, ADP, Ca+2 and Sr+2 ions (PDB entry [[3lj0]])' scene='51/516469/Cv/1'> | ||
== Function == | == Function == | ||
'''Ire1''' is a serine/threonine protein kinase/endoribonuclease. It is important in altering gene expression as a response to endoplasmic reticulum-based stress signals<ref>PMID:11034898</ref>. The endoribonuclase domain of Ire1 is a transcriptional activator which triggers growth arrest and apoptosis. The kinase domain of Ire1 is required for activation of the endoribonuclase domain. Ire1 senses unfolded proteins causing its auto-activation. | '''Ire1''' is a serine/threonine protein kinase/endoribonuclease. It is important in altering gene expression as a response to endoplasmic reticulum-based stress signals<ref>PMID:11034898</ref>. The endoribonuclase domain of Ire1 is a transcriptional activator which triggers growth arrest and apoptosis. The kinase domain of Ire1 is required for activation of the endoribonuclase domain. Ire1 senses unfolded proteins causing its auto-activation. | ||
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== Structural highlights == | == Structural highlights == | ||
Yeast Ire1 structure contains 3 phosphorylated residues: 2 Ser and a Thr. | Yeast Ire1 structure contains 3 phosphorylated residues: 2 Ser and a Thr. Ire1 shows a different binding site for ADP and for quercetin. Quercetin is a powerful activator of Ire1. Ire1 binds 2 molecules of quercetin at its dimer interface<ref>PMID:23880584</ref>. | ||
==3D structures of Ire1== | ==3D structures of Ire1== | ||
