TRYPTOPHAN-NORLEUCINE 1,5-DISUBSTITUTED TETRAZOLES AS CIS PEPTIDE-BOND MIMICS - INVESTIGATION OF THE BIOACTIVE CONFORMATION OF A POTENT ANDSELECTIVE PEPTIDE FOR THE CHOLECYSTOKININ-B RECEPTOR
Lw. Boteju et al., TRYPTOPHAN-NORLEUCINE 1,5-DISUBSTITUTED TETRAZOLES AS CIS PEPTIDE-BOND MIMICS - INVESTIGATION OF THE BIOACTIVE CONFORMATION OF A POTENT ANDSELECTIVE PEPTIDE FOR THE CHOLECYSTOKININ-B RECEPTOR, Bioorganic & medicinal chemistry letters, 3(10), 1993, pp. 2011-2016
It has been suggested that the cis conformation about the Trp-N-MeNle
amide bond is important in conferring high affinity and selectivity to
CCK-B receptor ligands. Substitution of the cis amide bond mimic Trp
psi(CN4)Nle into the peptide Gly-Trp-N-(Me)Nle-Asp-PheNH(2) causes it
to lose activity, suggesting that other structural effects of N-(Me)Nl
e incorporation may be important for high affinity and selectivity for
the CCK-B receptor.