title: Theoretical prediction of the basic helix types in alpha,beta-hybrid peptides.
abstract: This study provides a complete overview on all possible helical- folding patterns, their stabilities, and their detailed molecular structure in the novel foldamer class of alpha,beta-hybrid peptides on the basis of ab initio molecular orbital (MO) theory. The results indicate a considerable intrinsic potential of backbone folding. As found for other peptide foldamers, representatives of mixed or beta-helices are most stable in more apolar media, whereas polar environments favor the helices with the hydrogen bonds pointing in only one direction. The theoretical results confirm the hydrogen-bonding patterns found in the first experimental studies on these hybrid peptides. Selecting special backbone substitution patterns, the secondary structure potential of the alpha,beta-hybrid peptides could be of great importance for a rational peptide and protein design.
authors.affiliation: Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Brüderstrasse 34, D-04103 Leipzig, Germany.
authors.forename: Carsten
authors.initials: C
authors.lastname: Baldauf
authors.forename: Robert
authors.initials: R
authors.lastname: Günther
authors.forename: Hans-Jörg
authors.initials: HJ
authors.lastname: Hofmann
mesh_terms: D006860:Hydrogen Bonding; D008956:Models, Chemical; D008958:Models, Molecular; D015394:Molecular Structure; D010455:Peptides / Q000737:chemistry*; D011237:Predictive Value of Tests; D017510:Protein Folding; D017433:Protein Structure, Secondary; D013816:Thermodynamics; D014867:Water / Q000737:chemistry
chemical_list: D010455:Peptides; D014867:Water