8pb4 | pdb_00008pb4

PsiM in complex with SAH and norbaeocystin, orthorhombic crystal form

spinqualitylabelsall models 8pb4, resolution 0.91Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8pb4 is a 1 chain structure with sequence from Psilocybe cubensis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 0.91Å Ligands: CL, SAH, XP6 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PSIM_PSICU N-methyltransferase; part of the gene cluster that mediates the biosynthesis of psilocybin, a psychotropic tryptamine-derived natural product (PubMed:28763571, PubMed:31150155). The first step in the pathway is the decarboxylation of L-tryptophan to tryptamine by the decarboxylase psiD (PubMed:28763571, PubMed:31150155). 4-hydroxy-L-tryptophan is accepted as substrate by psiD as well (PubMed:28763571). The cytochrome P450 monooxygenase psiH then converts tryptamine to 4-hydroxytryptamine (PubMed:28763571). The kinase psiK catalyzes the 4-O-phosphorylation step by converting 4-hydroxytryptamine into norbaeocystin (PubMed:28763571, PubMed:31150155). The methyltransferase psiM then catalyzes iterative methyl transfer to the amino group of norbaeocystin to yield psilocybin via a monomethylated intermediate, baeocystin (PubMed:28763571, PubMed:31150155). 4-hydroxy-6-methyl-l-tryptophancan also be converted the decarboxylase PsiD, kinase PsiK, and methyltransferase PsiM into respectively 6-methyl-norbaeocystin, 6-methylbaeocystin, and 6-methylpsilocybin (PubMed:31150155).

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