1OJD

HUMAN MONOAMINE OXIDASE B IN COMPLEX WITH Lauryldimethylamine-N-oxide (LDAO)

DOI: 10.2210/pdb1OJD/pdb

Classification: OXIDOREDUCTASE
Organism(s): Homo sapiens
Expression System: Komagataella pastoris
Mutation(s): No

Deposited: 2003-07-08 Released: 2003-08-15
Deposition Author(s): Binda, C., Edmondson, D.E., Mattevi, A.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 3.10 Å
R-Value Free: 0.260
R-Value Work: 0.252
R-Value Observed: 0.252

wwPDB Validation3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

Insights Into the Mode of Inhibition of Human Mitochondrial Monoamine Oxidase B from High-Resolution Crystal Structures

Binda, C., Li, M., Hubalek, F., Restelli, N., Edmondson, D.E., Mattevi, A.

(2003) Proc Natl Acad Sci U S A 100: 9750

PubMed: 12913124 Search on PubMedSearch on PubMed Central
DOI: 10.1073/pnas.1633804100
Structures With Same Primary Citation

PubMed Abstract:

Monoamine oxidase B (MAO-B) is an outer mitochondrial membrane-bound enzyme that catalyzes the oxidative deamination of arylalkylamine neurotransmitters and has been a target for a number of clinically used drug inhibitors. The 1.7-A structure of the reversible isatin-MAO-B complex has been determined; it forms a basis for the interpretation of the enzyme's structure when bound to either reversible or irreversible inhibitors. 1,4-Diphenyl-2-butene is found to be a reversible MAO-B inhibitor, which occupies both the entrance and substrate cavity space in the enzyme. Comparison of these two structures identifies Ile-199 as a "gate" between the two cavities. Rotation of the side chain allows for either separation or fusion of the two cavities. Inhibition of the enzyme with N-(2-aminoethyl)-p-chlorobenzamide results in the formation of a covalent N(5) flavin adduct with the phenyl ring of the inhibitor occupying a position in the catalytic site overlapping that of isatin. Inhibition of MAO-B with the clinically used trans-2-phenylcyclopropylamine results in the formation of a covalent C(4a) flavin adduct with an opened cyclopropyl ring and the phenyl ring in a parallel orientation to the flavin. The peptide bond between the flavin-substituted Cys-397 and Tyr-398 is in a cis conformation, which allows the proper orientation of the phenolic ring of Tyr-398 in the active site. The flavin ring exists in a twisted nonplanar conformation, which is observed in the oxidized form as well as in both the N(5) and the C(4a) adducts. An immobile water molecule is H-bonded to Lys-296 and to the N(5) of the flavin as observed in other flavin-dependent amine oxidases. The active site cavities are highly apolar; however, hydrophilic areas exist near the flavin and direct the amine moiety of the substrate for binding and catalysis. Small conformational changes are observed on comparison of the different inhibitor-enzyme complexes. Future MAO-B drug design will need to consider "induced fit" contributions as an element in ligand-enzyme interactions.

Organizational Affiliation:

Department of Genetics and Microbiology, University of Pavia, Via Abbiategrasso, 27100 Pavia, Italy.

Macromolecules

Find similar proteins by: Sequence | Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
AMINE OXIDASE [FLAVIN-CONTAINING] B	A, B, C, D, E, F, G, H, I, L	520	Homo sapiens	Mutation(s): 0 Gene Names: MAOB EC: 1.4.3.4
Membrane protein Mpstruc	Group: MONOTOPIC MEMBRANE PROTEINS		Sub Group: Oxidases	Protein: Monoamine Oxidase B with bound Isatin
Find proteins for P27338 (Homo sapiens) Go to UniProtKB: P27338
NIH Common Fund Data Resources
PHAROS P27338 GTEx ENSG00000069535
Protein Feature View Full Protein Feature View for P27338

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
FAD Query on FAD Download CCD File	A, B, C, D, E, F, G, H, I, L	FLAVIN-ADENINE DINUCLEOTIDE C₂₇ H₃₃ N₉ O₁₅ P₂ VWWQXMAJTJZDQX-UYBVJOGSSA-N		Ligand Interaction
LDA Query on LDA Download CCD File	A, B, C, D, E, F, G, H, I, L	LAURYL DIMETHYLAMINE-N-OXIDE C₁₄ H₃₁ N O SYELZBGXAIXKHU-UHFFFAOYSA-N		Ligand Interaction