This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

6w39

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Current revision

Structure of unphosphorylated IRE1 in complex with G-1749

Structural highlights

6w39 is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.736Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

ERN1_HUMAN Senses unfolded proteins in the lumen of the endoplasmic reticulum via its N-terminal domain which leads to enzyme auto-activation. The active endoribonuclease domain splices XBP1 mRNA to generate a new C-terminus, converting it into a potent unfolded-protein response transcriptional activator and triggering growth arrest and apoptosis.^[1] ^[2] ^[3] [UniProtKB:Q9EQY0]

Publication Abstract from PubMed

Inositol-Requiring Enzyme 1 (IRE1) is an essential component of the Unfolded Protein Response. IRE1 spans the endoplasmic reticulum membrane, comprising a sensory lumenal domain, and tandem kinase and endoribonuclease (RNase) cytoplasmic domains. Excess unfolded proteins in the ER lumen induce dimerization and oligomerization of IRE1, triggering kinase trans-autophosphorylation and RNase activation. Known ATP-competitive small-molecule IRE1 kinase inhibitors either allosterically disrupt or stabilize the active dimeric unit, accordingly inhibiting or stimulating RNase activity. Previous allosteric RNase activators display poor selectivity and/or weak cellular activity. In this study, we describe a class of ATP-competitive RNase activators possessing high selectivity and strong cellular activity. This class of activators binds IRE1 in the kinase front pocket, leading to a distinct conformation of the activation loop. Our findings reveal exquisitely precise interdomain regulation within IRE1, advancing the mechanistic understanding of this important enzyme and its investigation as a potential small-molecule therapeutic target.

Activation of the IRE1 RNase through remodeling of the kinase front pocket by ATP-competitive ligands.,Ferri E, Le Thomas A, Wallweber HA, Day ES, Walters BT, Kaufman SE, Braun MG, Clark KR, Beresini MH, Mortara K, Chen YA, Canter B, Phung W, Liu PS, Lammens A, Ashkenazi A, Rudolph J, Wang W Nat Commun. 2020 Dec 14;11(1):6387. doi: 10.1038/s41467-020-19974-5. PMID:33318494^[4]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Tirasophon W, Welihinda AA, Kaufman RJ. A stress response pathway from the endoplasmic reticulum to the nucleus requires a novel bifunctional protein kinase/endoribonuclease (Ire1p) in mammalian cells. Genes Dev. 1998 Jun 15;12(12):1812-24. PMID:9637683
↑ Iwawaki T, Hosoda A, Okuda T, Kamigori Y, Nomura-Furuwatari C, Kimata Y, Tsuru A, Kohno K. Translational control by the ER transmembrane kinase/ribonuclease IRE1 under ER stress. Nat Cell Biol. 2001 Feb;3(2):158-64. PMID:11175748 doi:10.1038/35055065
↑ Liu CY, Xu Z, Kaufman RJ. Structure and intermolecular interactions of the luminal dimerization domain of human IRE1alpha. J Biol Chem. 2003 May 16;278(20):17680-7. Epub 2003 Mar 13. PMID:12637535 doi:10.1074/jbc.M300418200
↑ Ferri E, Le Thomas A, Wallweber HA, Day ES, Walters BT, Kaufman SE, Braun MG, Clark KR, Beresini MH, Mortara K, Chen YA, Canter B, Phung W, Liu PS, Lammens A, Ashkenazi A, Rudolph J, Wang W. Activation of the IRE1 RNase through remodeling of the kinase front pocket by ATP-competitive ligands. Nat Commun. 2020 Dec 14;11(1):6387. doi: 10.1038/s41467-020-19974-5. PMID:33318494 doi:http://dx.doi.org/10.1038/s41467-020-19974-5

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6w39"

@@ Line 3: / Line 3: @@
 <StructureSection load='6w39' size='340' side='right'caption='[[6w39]], [[Resolution|resolution]] 1.74&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6w39]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6W39 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6W39 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6w39]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6W39 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6W39 FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SJG:ethyl+~{N}-[6-methyl-5-[3-[2-[[(3~{S})-piperidin-3-yl]amino]pyrimidin-4-yl]pyridin-2-yl]oxy-naphthalen-1-yl]carbamate'>SJG</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.736&#8491;</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ERN1, IRE1 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SJG:ethyl+~{N}-[6-methyl-5-[3-[2-[[(3~{S})-piperidin-3-yl]amino]pyrimidin-4-yl]pyridin-2-yl]oxy-naphthalen-1-yl]carbamate'>SJG</scene></td></tr>
 <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6w39 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6w39 OCA], [https://pdbe.org/6w39 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6w39 RCSB], [https://www.ebi.ac.uk/pdbsum/6w39 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6w39 ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[https://www.uniprot.org/uniprot/ERN1_HUMAN ERN1_HUMAN]] Senses unfolded proteins in the lumen of the endoplasmic reticulum via its N-terminal domain which leads to enzyme auto-activation. The active endoribonuclease domain splices XBP1 mRNA to generate a new C-terminus, converting it into a potent unfolded-protein response transcriptional activator and triggering growth arrest and apoptosis.<ref>PMID:9637683</ref> <ref>PMID:11175748</ref> <ref>PMID:12637535</ref> [UniProtKB:Q9EQY0]
+[https://www.uniprot.org/uniprot/ERN1_HUMAN ERN1_HUMAN] Senses unfolded proteins in the lumen of the endoplasmic reticulum via its N-terminal domain which leads to enzyme auto-activation. The active endoribonuclease domain splices XBP1 mRNA to generate a new C-terminus, converting it into a potent unfolded-protein response transcriptional activator and triggering growth arrest and apoptosis.<ref>PMID:9637683</ref> <ref>PMID:11175748</ref> <ref>PMID:12637535</ref> [UniProtKB:Q9EQY0]
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 19: / Line 19: @@
 </div>
 <div class="pdbe-citations 6w39" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Ire1|Ire1]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Human]]
+[[Category: Homo sapiens]]
 [[Category: Large Structures]]
-[[Category: Ferri, E]]
+[[Category: Ferri E]]
-[[Category: Joachim, R]]
+[[Category: Joachim R]]
-[[Category: Mortara, K]]
+[[Category: Mortara K]]
-[[Category: Wang, W]]
+[[Category: Wang W]]
-[[Category: Kinase]]
-[[Category: Transferase]]
-[[Category: Upr]]

6w39

From Proteopedia

Current revision

Structure of unphosphorylated IRE1 in complex with G-1749

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox