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Tetra-hydro-alstonine.
Cachet X, Porée FH, Michel S, Lemoine P. Cachet X, et al. Acta Crystallogr Sect E Struct Rep Online. 2013 Aug 7;69(Pt 9):o1389-90. doi: 10.1107/S1600536813021168. eCollection 2013. Acta Crystallogr Sect E Struct Rep Online. 2013. PMID: 24427031 Free PMC article.
In the title compound, C21H24N2O3 [systematic name: methyl (20alpha)-16,17-dide-hydro-19alpha-methyl-18-oxayohimban-16-carb-oxy-l-ate], the mol-ecule adopts an L-type conformation. The crystal packing is governed by one N-Hpi and one C-Hpi inter-actions. The crystal cohesi …
In the title compound, C21H24N2O3 [systematic name: methyl (20alpha)-16,17-dide-hydro-19alpha-methyl-18-oxayohimban-16-carb-oxy-l-ate], the …
A conserved phenylalanine of motif IV in superfamily 2 helicases is required for cooperative, ATP-dependent binding of RNA substrates in DEAD-box proteins.
Banroques J, Cordin O, Doère M, Linder P, Tanner NK. Banroques J, et al. Mol Cell Biol. 2008 May;28(10):3359-71. doi: 10.1128/MCB.01555-07. Epub 2008 Mar 10. Mol Cell Biol. 2008. PMID: 18332124 Free PMC article.
For DEAD-box proteins, the phenylalanine also aligns a highly conserved arginine of motif VI through van der Waals and cation-pi interactions, thereby helping to maintain the network of interactions that exist between the different motifs involved in ATP and RNA binding... …
For DEAD-box proteins, the phenylalanine also aligns a highly conserved arginine of motif VI through van der Waals and cation-pi inte …