4bqt

Aplysia californica AChBP in complex with Cytisine

spinqualitylabelsall models 4bqt, resolution 2.88Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4bqt is a 5 chain structure with sequence from Aplysia californica. This structure supersedes the now removed PDB entry 4afo. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.88Å Ligands: C5E, CL, CO Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q8WSF8_APLCA Publication Abstract from PubMed Smoking cessation is an important aim in public health worldwide as tobacco smoking causes many preventable deaths. Addiction to tobacco smoking results from the binding of nicotine to nicotinic acetylcholine receptors (nAChRs) in the brain, in particular the alpha4beta2 receptor. One way to aid smoking cessation is by the use of nicotine replacement therapies or partial nAChR agonists like cytisine or varenicline. Here we present the co-crystal structures of cytisine and varenicline in complex with Aplysia californica acetylcholine-binding protein and use these as models to investigate binding of these ligands binding to nAChRs. This analysis of the binding properties of these two partial agonists provides insight into differences with nicotine binding to nAChRs. A mutational analysis reveals that the residues conveying subtype selectivity in nAChRs reside on the binding site complementary face and include features extending beyond the first shell of contacting residues. Structural Characterization of Binding Mode of Smoking Cessation Drugs to Nicotinic Acetylcholine Receptors through Study of Ligand Complexes with Acetylcholine-binding Protein.,Rucktooa P, Haseler CA, van Elk R, Smit AB, Gallagher T, Sixma TK J Biol Chem. 2012 Jul 6;287(28):23283-93. Epub 2012 May 2. PMID:22553201 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Acetylcholine binding protein 3D structures

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