2vq5 | pdb_00002vq5

X-ray structure of Norcoclaurine synthase from Thalictrum flavum in complex with dopamine and hydroxybenzaldehyde

spinqualitylabelsall models 2vq5, resolution 2.09Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2vq5 is a 2 chain structure with sequence from Thalictrum flavum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ACT, CL, HBA, LDP NonStd Res: MSE Related: 2vne Activity: (S)-norcoclaurine synthase, with EC number 4.2.1.78 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [NCS_THLFG] Involved in the biosynthesis of the common precursor of all benzylisoquinoline alkaloids such as morphine, sanguinarine, codeine or berberine. Condenses dopamine and 4-hydroxyphenylacetaldehyde. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The enzyme norcoclaurine synthase (NCS) catalyzes the stereospecific Pictet-Spengler cyclization between dopamine and 4-hydroxyphenylacetaldehyde, the key step in the benzylisoquinoline alkaloid biosynthetic pathway. The crystallographic structure of norcoclaurine synthase from Thalictrum flavum in its complex with dopamine substrate and the nonreactive substrate analogue 4-hydroxybenzaldehyde has been solved at 2.1A resolution. NCS shares no common features with the functionally correlated "Pictet-Spenglerases" that catalyze the first step of the indole alkaloids pathways and conforms to the overall fold of the Bet v1-like protein. The active site of NCS is located within a 20-A-long catalytic tunnel and is shaped by the side chains of a tyrosine, a lysine, an aspartic, and a glutamic acid. The geometry of the amino acid side chains with respect to the substrates reveals the structural determinants that govern the mechanism of the stereoselective Pictet-Spengler cyclization, thus establishing an excellent foundation for the understanding of the finer details of the catalytic process. Site-directed mutations of the relevant residues confirm the assignment based on crystallographic findings. Structural basis of enzymatic (S)-norcoclaurine biosynthesis.,Ilari A, Franceschini S, Bonamore A, Arenghi F, Botta B, Macone A, Pasquo A, Bellucci L, Boffi A J Biol Chem. 2009 Jan 9;284(2):897-904. Epub 2008 Nov 12. PMID:19004827 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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