Combinatorial library of improved peptide aptamers, CLIPs to inhibit RAGE signal transduction in mammalian cells

Peptide aptamers are small proteins containing a randomized peptide sequence embedded into a stable protein scaffold, such as Thioredoxin. We developed a robust method for building a Combinatorial Library of Improved Peptide aptamers (CLIPs) of high complexity, containing ≥3×10(10) independent clone...

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Veröffentlicht in:PloS one 2013-06, Vol.8 (6), p.e65180-e65180
Hauptverfasser: Reverdatto, Sergey, Rai, Vivek, Xue, Jing, Burz, David S, Schmidt, Ann Marie, Shekhtman, Alexander
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creator Reverdatto, Sergey
Rai, Vivek
Xue, Jing
Burz, David S
Schmidt, Ann Marie
Shekhtman, Alexander
description Peptide aptamers are small proteins containing a randomized peptide sequence embedded into a stable protein scaffold, such as Thioredoxin. We developed a robust method for building a Combinatorial Library of Improved Peptide aptamers (CLIPs) of high complexity, containing ≥3×10(10) independent clones, to be used as a molecular tool in the study of biological pathways. The Thioredoxin scaffold was modified to increase solubility and eliminate aggregation of the peptide aptamers. The CLIPs was used in a yeast two-hybrid screen to identify peptide aptamers that bind to various domains of the Receptor for Advanced Glycation End products (RAGE). NMR spectroscopy was used to identify interaction surfaces between the peptide aptamers and RAGE domains. Cellular functional assays revealed that in addition to directly interfering with known binding sites, peptide aptamer binding distal to ligand sites also inhibits RAGE ligand-induced signal transduction. This finding underscores the potential of using CLIPs to select allosteric inhibitors of biological targets.
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subjects Advanced glycosylation end products
Allosteric properties
Animals
Aptamers
Aptamers, Peptide - chemistry
Aptamers, Peptide - pharmacology
Binding sites
Biochemistry
Biology
Cell Line
Cells (Biology)
Cellular signal transduction
Chemistry
Clips
Combinatorial analysis
E coli
Escherichia coli
Glycosylation
Ligands
Magnetic resonance spectroscopy
Male
Mammalian cells
Medical screening
Mice
Molecular Docking Simulation
Molecular Dynamics Simulation
NMR
NMR spectroscopy
Nuclear magnetic resonance
Nuclear magnetic resonance spectroscopy
Peptide Library
Peptides
Protein Binding
Protein Conformation
Protein Interaction Domains and Motifs
Proteins
Rats
Receptor for Advanced Glycation End Products
Receptors, Immunologic - antagonists & inhibitors
Receptors, Immunologic - chemistry
Signal transduction
Signal Transduction - drug effects
Solubility
Spectroscopy
Thioredoxin
Thioredoxins
Thioredoxins - chemistry
Thioredoxins - genetics
Thioredoxins - metabolism
Two-Hybrid System Techniques
Yeast
title Combinatorial library of improved peptide aptamers, CLIPs to inhibit RAGE signal transduction in mammalian cells
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