Switching the H-bonding network of a foldamer by modulating the backbone chirality and constitutional ratio of amino acids
作者:Veera V. E. Ramesh、Kuruppanthara N. Vijayadas、Snehal Dhokale、Rajesh G. Gonnade、Pattuparambil R. Rajamohanan、Gangadhar J. Sanjayan
DOI:10.1039/c3ob41369a
日期:——
This communication describes the folding propensity of a heterofoldamer motif featuring proline (Pro) and anthranilic acid (Ant) residues in a 1 : 2 : 1 (α : β : α) constitutional ratio. Structural investigations unequivocally suggest that the hydrogen-bonding network of this foldamer motif can be switched between 9-membered and 6-membered by modulating the backbone chirality and constitutional ratio of the amino acid residues.
The Ant-Pro Reverse-Turn Motif. Structural Features and Conformational Characteristics
作者:Vijaykumar H. Thorat、Tukaram S. Ingole、Kuruppanthara N. Vijayadas、Roshna V. Nair、Sangram S. Kale、Veera V. E. Ramesh、Hilda C. Davis、Panchami Prabhakaran、Rajesh G. Gonnade、Rupesh L. Gawade、Vedavati G. Puranik、Pattuparambil R. Rajamohanan、Gangadhar J. Sanjayan
DOI:10.1002/ejoc.201201739
日期:2013.6
characteristic conformational features of the Ant-Pro reverseturn ― a folded pseudo β-turn motif that displays a closed nine-membered-ring hydrogen-bonded network involving just two amino acid residues, namely anthranilic acid (Ant; a constrained β-amino acid), and proline (Pro; a constrained α-amino acid). The results from the extensive investigation of ten crystal structures and their NMR conformations in the
Reversal of H-bonding direction by N-sulfonation in a synthetic reverse-turn peptide motif
作者:Kuruppanthara N. Vijayadas、Amol S. Kotmale、Shridhar H. Thorat、Rajesh G. Gonnade、Roshna V. Nair、Pattuparambil R. Rajamohanan、Gangadhar J. Sanjayan
DOI:10.1039/c4ob02438a
日期:——
This manuscript depicts an intriguing example of H-bonding reversal upon introduction of a sulfonamide linkage at the N-terminus of a synthetic reverse-turn peptide.