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Related Concept Videos

Protein-protein Interfaces02:04

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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
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Related Experiment Video

Updated: Apr 15, 2026

Author Spotlight: A Computational Approach to Decipher Amino Acid Preferences in Multispecific Protein-Protein Interactions
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Extended piperidine-piperidinone protein interface mimics.

Dongyue Xin, Arjun Raghuraman, Kevin Burgess

    The Journal of Organic Chemistry
    |April 14, 2015
    PubMed
    Summary

    New minimalist structures, H and I, mimic protein interfaces with enhanced rigidity and reduced aggregation. Oligo(piperidinone-piperidine) compounds I show increased conformational ordering in solution.

    Area of Science:

    • Medicinal Chemistry
    • Organic Chemistry
    • Biophysical Chemistry

    Background:

    • Peptides are crucial in biological interactions but suffer from instability and aggregation.
    • Developing stable, non-peptide mimics of protein interfaces is a key challenge in drug discovery.

    Purpose of the Study:

    • To design and synthesize novel minimalist structures (H and I) as protein interface mimics.
    • To investigate the conformational properties and stability of these novel chemotypes.

    Main Methods:

    • Iterative coupling synthesis of oligo(piperidinone-piperidine) compounds (I).
    • Single crystal X-ray crystallography of oligomers.
    • Circular dichroism (CD) spectroscopy to analyze conformational ordering.

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    Main Results:

    • Oligo(piperidinone-piperidine) compounds I were successfully synthesized, including a pentamer.
    • X-ray crystallography revealed structural details of shorter oligomers.
    • CD spectroscopy indicated increased conformational ordering in longer oligomers in solution, with an estimated N-to-C distance of 36 Å for the pentamer.

    Conclusions:

    • Minimalist structures H and I offer advantages over peptides as protein interface mimics.
    • Oligo(piperidinone-piperidine)s exhibit conformational ordering, suggesting their potential for specific molecular recognition.