title: Synthesis of the ribosomal P-site substrate CCA-pcb.
abstract: [reaction: see text] CCA-pcb (cytidylyl-(3'5')-cytidylyl-(3'5')-3'(2')-O-(N-(6-D-(+)-biotinoylaminohexanoyl)-L-phenylalanyl)adenosine), a ribosomal P-site substrate, was synthesized by phosphoramidite chemistry in 26 steps with an overall yield of 18%, starting from biotin. The synthesis relies on the judicious selection of orthogonal silyl protecting groups for the 5'-hydroxyls and acid-labile protecting groups (DMTr, AcE, and MeE) at other reactive sites to ensure the intactness of the labile ester. Both 3'-esterification and nucleotide coupling were accomplished by in situ activation with imidazolium ions.
authors.affiliation: Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06520-8114, USA.
authors.forename: Minghong
authors.initials: M
authors.lastname: Zhong
authors.forename: Scott A
authors.initials: SA
authors.lastname: Strobel
mesh_terms: D015226:Dinucleoside Phosphates / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D012270:Ribosomes / Q000737:chemistry*
chemical_list: D015226:Dinucleoside Phosphates; C507687:cytidylyl-(3'5')-cytidylyl-(3'5')-3'(2')-O-(N-(6-D-(+)-biotinoylaminohexanoyl)-L-phenylalanyl)adenosine