Structure–Activity Relationship Study of a CXC Chemokine Receptor Type 4 Antagonist, FC131, Using a Series of Alkene Dipeptide Isosteres
摘要:
A structure-activity relationship study on a highly potent CXC chemokine receptor type 4 (CXCR4) antagonist, FC131 [cyclo(-D-Tyr(1)-Arg(2)-Arg(3)-Nal(4)-Gly(5)-)], was carried out using a series of alkene isosteres of the D-Tyr(1)-L/D-Arg(2) dipeptide to investigate the binding mode of FC131 and its derivatives with CXCR4. The structure-activity relationships of isostere-containing FC131 analogues were similar to those of the parent FC131 and its derivatives, suggesting that a trans-conformer of the D-Tyt(1)-Arg(2) peptide bond is the dominant contributor to the bioactive conformations of FC131. Although NMR analysis demonstrated that the two conformations of the peptidomimetic containing the D-Tyr(1)-D-Arg(2) isostere are possible, binding-mode prediction indicated that the orientations of the alkene motif within D-Tyr(1)-MeArg(2) peptidomimetics depend on the chirality of Arg(2) and the beta-methyl group of the isostere unit, which makes the dominant contribution for binding to the receptor. The most potent FC122 [cyclo(-D-Tyr(1)-D-MeArg(2)-Arg(3)-Nal(4)-Gly(5)-)] bound with CXCR4 by a binding mode different from that of FC131.
Structure–Activity Relationship Study of a CXC Chemokine Receptor Type 4 Antagonist, FC131, Using a Series of Alkene Dipeptide Isosteres
摘要:
A structure-activity relationship study on a highly potent CXC chemokine receptor type 4 (CXCR4) antagonist, FC131 [cyclo(-D-Tyr(1)-Arg(2)-Arg(3)-Nal(4)-Gly(5)-)], was carried out using a series of alkene isosteres of the D-Tyr(1)-L/D-Arg(2) dipeptide to investigate the binding mode of FC131 and its derivatives with CXCR4. The structure-activity relationships of isostere-containing FC131 analogues were similar to those of the parent FC131 and its derivatives, suggesting that a trans-conformer of the D-Tyt(1)-Arg(2) peptide bond is the dominant contributor to the bioactive conformations of FC131. Although NMR analysis demonstrated that the two conformations of the peptidomimetic containing the D-Tyr(1)-D-Arg(2) isostere are possible, binding-mode prediction indicated that the orientations of the alkene motif within D-Tyr(1)-MeArg(2) peptidomimetics depend on the chirality of Arg(2) and the beta-methyl group of the isostere unit, which makes the dominant contribution for binding to the receptor. The most potent FC122 [cyclo(-D-Tyr(1)-D-MeArg(2)-Arg(3)-Nal(4)-Gly(5)-)] bound with CXCR4 by a binding mode different from that of FC131.
A structure-activity relationship study on a highly potent CXC chemokine receptor type 4 (CXCR4) antagonist, FC131 [cyclo(-D-Tyr(1)-Arg(2)-Arg(3)-Nal(4)-Gly(5)-)], was carried out using a series of alkene isosteres of the D-Tyr(1)-L/D-Arg(2) dipeptide to investigate the binding mode of FC131 and its derivatives with CXCR4. The structure-activity relationships of isostere-containing FC131 analogues were similar to those of the parent FC131 and its derivatives, suggesting that a trans-conformer of the D-Tyt(1)-Arg(2) peptide bond is the dominant contributor to the bioactive conformations of FC131. Although NMR analysis demonstrated that the two conformations of the peptidomimetic containing the D-Tyr(1)-D-Arg(2) isostere are possible, binding-mode prediction indicated that the orientations of the alkene motif within D-Tyr(1)-MeArg(2) peptidomimetics depend on the chirality of Arg(2) and the beta-methyl group of the isostere unit, which makes the dominant contribution for binding to the receptor. The most potent FC122 [cyclo(-D-Tyr(1)-D-MeArg(2)-Arg(3)-Nal(4)-Gly(5)-)] bound with CXCR4 by a binding mode different from that of FC131.