5MBX

Crystal structure of reduced murine N1-acetylpolyamine oxidase in complex with N1-acetylspermine

Summary for 5MBX

• Entry DOI: 10.2210/pdb5mbx/pdb
• Descriptor: Peroxisomal N(1)-acetyl-spermine/spermidine oxidase, FLAVIN-ADENINE DINUCLEOTIDE, N-[3-({4-[(3-aminopropyl)amino]butyl}amino)propyl]acetamide, ... (5 entities in total)
• Functional Keywords: flavin amine oxidase, oxidoreductase
• Biological source: Mus musculus (Mouse)
• Cellular location: Peroxisome : Q8C0L6
• Total number of polymer chains: 1
• Total formula weight: 55760.64

Authors

Sjogren, T.,Aagaard, A.,Wassvik, C.,Snijder, A.,Barlind, L. (deposition date: 2016-11-09, release date: 2017-01-18, Last modification date: 2024-01-17)

Primary citation

Sjogren, T.,Wassvik, C.M.,Snijder, A.,Aagaard, A.,Kumanomidou, T.,Barlind, L.,Kaminski, T.P.,Kashima, A.,Yokota, T.,Fjellstrom, O.
The Structure of Murine N(1)-Acetylspermine Oxidase Reveals Molecular Details of Vertebrate Polyamine Catabolism.
Biochemistry, 56:458-467, 2017

PubMed Abstract: N-Acetylspermine oxidase (APAO) catalyzes the conversion of N-acetylspermine or N-acetylspermidine to spermidine or putrescine, respectively, with concomitant formation of N-acetyl-3-aminopropanal and hydrogen peroxide. Here we present the structure of murine APAO in its oxidized holo form and in complex with substrate. The structures provide a basis for understanding molecular details of substrate interaction in vertebrate APAO, highlighting a key role for an asparagine residue in coordinating the N-acetyl group of the substrate. We applied computational methods to the crystal structures to rationalize previous observations with regard to the substrate charge state. The analysis suggests that APAO features an active site ideally suited for binding of charged polyamines. We also reveal the structure of APAO in complex with the irreversible inhibitor MDL72527. In addition to the covalent adduct, a second MDL72527 molecule is bound in the active site. Binding of MDL72527 is accompanied by altered conformations in the APAO backbone. On the basis of structures of APAO, we discuss the potential for development of specific inhibitors.

PubMed: 28029774
DOI: 10.1021/acs.biochem.6b01140

Experimental method

X-RAY DIFFRACTION (1.4 Å)