Binding of nanoparticle receptors to peptide alpha-helices using amino acid-functionalized nanoparticles.
Nanoparticles provide large surface areas and controlled surface functionality and structure, making them excellent scaffolds for peptide recognition. A family of nanoparticles has been fabricated by amino acid functionalization to afford tailored surfaces. These particles are complementary to a tetraaspartate peptide (TAP) featuring cofacial anionic functionality when in the alpha-helical conformation. The functional groups present on these nanoparticle surfaces provide a tool to investigate the contribution of various noncovalent interactions at the nanoparticle-peptide interface. The ability of these particles to enforce the folding of the peptide into an alpha-helix was explored, demonstrating high helicity induction with particles featuring dicationic amino acids such as lysine or histidine, and little or no helix stabilization with hydrophobic amino acid termini.
Ghosh
Partha S
PS
Department of Chemistry, University of Massachusetts, Amherst, MA 01003, USA.
Han
Gang
G
Erdogan
Belma
B
Rosado
Olga
O
Rotello
Vincent M
VM
D000595:Amino Acid Sequence; D000596:Amino Acids / Q000737:chemistry*; D002942:Circular Dichroism; D008024:Ligands; D008958:Models, Molecular; D008969:Molecular Sequence Data; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010455:Peptides / Q000737:chemistry*; D017433:Protein Structure, Secondary; D017434:Protein Structure, Tertiary; D018000:Receptors, Peptide / Q000737:chemistry* / Q000648:ultrastructure; D013438:Sulfhydryl Compounds / Q000737:chemistry
D000596:Amino Acids; D008024:Ligands; D010455:Peptides; D018000:Receptors, Peptide; D013438:Sulfhydryl Compounds