7OY0 image
Entry Detail
PDB ID:
7OY0
Title:
Structure of human Spermine Oxidase in complex with a highly selective allosteric inhibitor
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2021-06-23
Release Date:
2022-07-13
Method Details:
Experimental Method:
Resolution:
2.09 Å
R-Value Free:
0.23
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 3 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Spermine oxidase,Spermine oxidase,Spermine oxidase
Chain IDs:A
Chain Length:494
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Structure of human spermine oxidase in complex with a highly selective allosteric inhibitor.
Commun Biol 5 787 787 (2022)
PMID: 35931745 DOI: 10.1038/s42003-022-03735-9

Abstact

Human spermine oxidase (hSMOX) plays a central role in polyamine catabolism. Due to its association with several pathological processes, including inflammation and cancer, hSMOX has garnered interest as a possible therapeutic target. Therefore, determination of the structure of hSMOX is an important step to enable drug discovery and validate hSMOX as a drug target. Using insights from hydrogen/deuterium exchange mass spectrometry (HDX-MS), we engineered a hSMOX construct to obtain the first crystal structure of hSMOX bound to the known polyamine oxidase inhibitor MDL72527 at 2.4 Å resolution. While the overall fold of hSMOX is similar to its homolog, murine N1-acetylpolyamine oxidase (mPAOX), the two structures contain significant differences, notably in their substrate-binding domains and active site pockets. Subsequently, we employed a sensitive biochemical assay to conduct a high-throughput screen that identified a potent and selective hSMOX inhibitor, JNJ-1289. The co-crystal structure of hSMOX with JNJ-1289 was determined at 2.1 Å resolution, revealing that JNJ-1289 binds to an allosteric site, providing JNJ-1289 with a high degree of selectivity towards hSMOX. These results provide crucial insights into understanding the substrate specificity and enzymatic mechanism of hSMOX, and for the design of highly selective inhibitors.

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