4U79

Crystal structure of human JNK3 in complex with a benzenesulfonamide inhibitor.

Summary for 4U79

• Entry DOI: 10.2210/pdb4u79/pdb
• Related: 3DA6 4U6R
• Descriptor: Mitogen-activated protein kinase 10, N-{4-[(3-{2-[(trans-4-aminocyclohexyl)amino]pyrimidin-4-yl}pyridin-2-yl)oxy]naphthalen-1-yl}benzenesulfonamide (3 entities in total)
• Functional Keywords: transferase, transferase-transferase inhibitor complex, transferase/transferase inhibitor
• Biological source: Homo sapiens (Human)
• Cellular location: Cytoplasm : P53779
• Total number of polymer chains: 1
• Total formula weight: 42626.35

Authors

Mohr, C. (deposition date: 2014-07-30, release date: 2014-10-08, Last modification date: 2023-09-27)

Primary citation

Harrington, P.E.,Biswas, K.,Malwitz, D.,Tasker, A.S.,Mohr, C.,Andrews, K.L.,Dellamaggiore, K.,Kendall, R.,Beckmann, H.,Jaeckel, P.,Materna-Reichelt, S.,Allen, J.R.,Lipford, J.R.
Unfolded Protein Response in Cancer: IRE1 alpha Inhibition by Selective Kinase Ligands Does Not Impair Tumor Cell Viability.
Acs Med.Chem.Lett., 6:68-72, 2015

PubMed Abstract: The kinase/endonuclease inositol requiring enzyme 1 (IRE1α), one of the sensors of unfolded protein accumulation in the endoplasmic reticulum that triggers the unfolded protein response (UPR), has been investigated as an anticancer target. We identified potent allosteric inhibitors of IRE1α endonuclease activity that bound to the kinase site on the enzyme. Structure-activity relationship (SAR) studies led to 16 and 18, which were selective in kinase screens and were potent against recombinant IRE1α endonuclease as well as cellular IRE1α. The first X-ray crystal structure of a kinase inhibitor (16) bound to hIRE1α was obtained. Screening of native tumor cell lines (>300) against selective IRE1α inhibitors failed to demonstrate any effect on cellular viability. These results suggest that IRE1α activity is not essential for viability in most tumor cell lines, in vitro, and that interfering with the survival functions of the UPR may not be an effective strategy to block tumorigenesis.

PubMed: 25589933
DOI: 10.1021/ml500315b

Experimental method

X-RAY DIFFRACTION (2.23 Å)