6E5J

Heterogeneous-Backbone Mimics of a Designed Disulfide-Rich Protein: Aib turn, beta3 helix, N-methyl hairpin

Summary for 6E5J

• Entry DOI: 10.2210/pdb6e5j/pdb
• NMR Information: BMRB: 30498
• Descriptor: Designed peptide NC_HEE_D1: Aib turn, beta3 helix, N-methyl hairpin mutant (1 entity in total)
• Functional Keywords: heterogeneous backbone foldamer, de novo protein
• Biological source: synthetic construct
• Total number of polymer chains: 1
• Total formula weight: 3328.93

Authors

Cabalteja, C.C.,Mihalko, D.S.,Horne, W.S. (deposition date: 2018-07-20, release date: 2018-11-21, Last modification date: 2023-11-15)

Primary citation

Cabalteja, C.C.,Mihalko, D.S.,Horne, W.S.
Heterogeneous-Backbone Foldamer Mimics of a Computationally Designed, Disulfide-Rich Miniprotein.
Chembiochem, 20:103-110, 2019

PubMed Abstract: Disulfide-rich peptides have found widespread use in the development of bioactive agents; however, low proteolytic stability and the difficulty of exerting synthetic control over chain topology present barriers to their application in some systems. Herein, we report a method that enables the creation of artificial backbone ("foldamer") mimics of compact, disulfide-rich tertiary folds. Systematic replacement of a subset of natural α-residues with various artificial building blocks in the context of a computationally designed prototype sequence leads to "heterogeneous-backbone" variants that undergo clean oxidative folding, adopt tertiary structures indistinguishable from that of the prototype, and enjoy proteolytic protection beyond that inherent to the topologically constrained scaffold. Collectively, these results demonstrate systematic backbone substitution to be a viable method to engineer the properties of disulfide-rich sequences and expands the repertoire of protein mimicry by foldamers to an exciting new structural class.

PubMed: 30326175
DOI: 10.1002/cbic.201800558

Experimental method

SOLUTION NMR