6p4v

1.65 Angstrom ternary complex of Deoxyhypusine synthase with cofactor NAD and spermidine mimic inhibitor GC7

spinqualitylabelsall models 6p4v, resolution 1.65Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6p4v 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 1.65Å Ligands: GC7, MPD, NAD Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function DHYS_HUMAN Catalyzes the NAD-dependent oxidative cleavage of spermidine and the subsequent transfer of the butylamine moiety of spermidine to the epsilon-amino group of a specific lysine residue of the eIF-5A precursor protein to form the intermediate deoxyhypusine residue. Publication Abstract from PubMed Deoxyhypusine synthase (DHPS) utilizes spermidine and NAD as cofactors to incorporate a hypusine modification into the eukaryotic translation initiation factor 5A (eIF5A). Hypusine is essential for eIF5A activation, which, in turn, plays a key role in regulating protein translation of selected mRNA that are associated with the synthesis of oncoproteins, thereby enhancing tumor cell proliferation. Therefore, inhibition of DHPS is a promising therapeutic option for the treatment of cancer. To discover novel lead compounds that target DHPS, we conducted synthetic studies with a hit obtained via high-throughput screening. Optimization of the ring structures of the amide compound (2) led to bromobenzothiophene (11g) with potent inhibitory activity against DHPS. X-ray crystallographic analysis of 11g complexed with DHPS revealed a dramatic conformational change in DHPS, which suggests the presence of a novel allosteric site. These findings provide the basis for the development of novel therapy distinct from spermidine mimetic inhibitors. Discovery of Novel Allosteric Inhibitors of Deoxyhypusine Synthase.,Tanaka Y, Kurasawa O, Yokota A, Klein MG, Ono K, Saito B, Matsumoto S, Okaniwa M, Ambrus-Aikelin G, Morishita D, Kitazawa S, Uchiyama N, Ogawa K, Kimura H, Imamura S J Med Chem. 2020 Mar 26;63(6):3215-3226. doi: 10.1021/acs.jmedchem.9b01979. Epub , 2020 Mar 16. PMID:32142284 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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