Assembly of π-Stacking Helical Peptides into a Porous and Multivariable Proteomimetic Framework.
Sherrie L Heinz-KunertAshma PandyaViet Thuc DangPhuong Nguyen TranSabari GhoshDan McElhenyBernard D SantarsieroZhong RenAndy I NguyenPublished in: Journal of the American Chemical Society (2022)
The evolution of proteins from simpler, self-assembled peptides provides a powerful blueprint for the design of complex synthetic materials. Previously, peptide-metal frameworks using short sequences (≤3 residues) have shown great promise as proteomimetic materials that exhibit sophisticated capabilities. However, their development has been hindered due to few variable residues and restricted choice of side-chains that are compatible with metal ions. Herein, we developed a noncovalent strategy featuring π-stacking bipyridyl residues to assemble much longer peptides into crystalline frameworks that tolerate even previously incompatible acidic and basic functionalities and allow an unprecedented level of pore variations. Single-crystal X-ray structures are provided for all variants to guide and validate rational design. These materials exhibit hallmark proteomimetic behaviors such as guest-selective induced fit and assembly of multimetallic units. Significantly, we demonstrate facile optimization of the framework design to substantially increase affinity toward a complex organic molecule.
Keyphrases
- high resolution
- amino acid
- water soluble
- quantum dots
- highly efficient
- copy number
- metal organic framework
- diabetic rats
- oxidative stress
- drug induced
- ionic liquid
- magnetic resonance imaging
- machine learning
- gene expression
- dna methylation
- gold nanoparticles
- decision making
- computed tomography
- tissue engineering
- stress induced
- genetic diversity
- oxide nanoparticles