Application of C-Terminal 7-Azabicyclo[2.2.1]heptane to Stabilize ß-Strand-like Extended Conformation of a Neighboring α-Amino Acid.
J Org Chem
; 83(21): 13063-13079, 2018 11 02.
Article
en En
| MEDLINE
| ID: mdl-30284439
ABSTRACT
ß-Strands are formed by extended linear peptide chains that are usually paired to form ß-sheet structure through interstrand hydrogen bonding. Linking a structured organic molecule with α-amino acid(s) can enforce or stabilize ß-strand-like extended structures of the jointed amino acids. Spectroscopic and simulation studies indicated that the presence of a C-terminal 7-azabicyclo[2.2.1]heptane amine (Abh) favors a ß-strand-like extended conformation of the adjacent α-amino acid on the N side. The bridgehead substitution of the Abh unit biases the amide cis-trans equilibrium of the adjacent α-amino acid residue to cis conformation. The proximity, specified by the presence of bond paths (such as H-H bond path) between the bridgehead proton of Abh and the α-proton of the α-amino acid provides a driving force favoring the extended conformation, which is independent of solvents. These results provide a basis for de novo design of ß-strand-mimicking extended peptides by using ß-strand enforcer/stabilizer even in the absence of the interstrand hydrogen bonding.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Compuestos Bicíclicos Heterocíclicos con Puentes
/
Aminoácidos
Idioma:
En
Revista:
J Org Chem
Año:
2018
Tipo del documento:
Article
País de afiliación:
Japón