Screening of peptide ligands for pyrroloquinoline quinone glucose dehydrogenase using antagonistic template-based biopanning

Int J Mol Sci. 2013 Nov 25;14(12):23244-56. doi: 10.3390/ijms141223244.

Abstract

We have developed a novel method, antagonistic template-based biopanning, for screening peptide ligands specifically recognizing local tertiary protein structures. We chose water-soluble pyrroloquinoline quinone (PQQ) glucose dehydrogenase (GDH-B) as a model enzyme for this screening. Two GDH-B mutants were constructed as antagonistic templates; these have some point mutations to induce disruption of local tertiary structures within the loop regions that are located at near glucose-binding pocket. Using phage display, we selected 12-mer peptides that specifically bound to wild-type GDH-B but not to the antagonistic templates. Consequently, a peptide ligand showing inhibitory activity against GDH-B was obtained. These results demonstrate that the antagonistic template-based biopanning is useful for screening peptide ligands recognizing the specific local tertiary structure of proteins.

MeSH terms

  • Amino Acid Sequence
  • Binding Sites
  • Glucose Dehydrogenases / antagonists & inhibitors*
  • Glucose Dehydrogenases / genetics
  • Glucose Dehydrogenases / metabolism
  • Kinetics
  • Ligands
  • Mutagenesis, Site-Directed
  • Peptide Library
  • Peptides / chemical synthesis
  • Peptides / chemistry
  • Peptides / metabolism*
  • Protein Structure, Tertiary
  • Substrate Specificity

Substances

  • Ligands
  • Peptide Library
  • Peptides
  • Glucose Dehydrogenases
  • glucose dehydrogenase (pyrroloquinoline-quinone)