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Related Concept Videos

Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with cytoskeletal...
Protein Folding01:25

Protein Folding

Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Peptide Bonds02:43

Peptide Bonds

A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...

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Related Experiment Video

Updated: Jul 15, 2026

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
07:26

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

Programming Multidomain Peptides With Molecular Frustration Into Biomolecular Condensates.

Debdatta Das1, Jenny N Nguyen1, Navneet Sahoo1

  • 1Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas, USA.

Small (Weinheim an Der Bergstrasse, Germany)
|July 14, 2026
PubMed
Summary

Molecular ordering in peptides influences biomolecular condensate formation. Partially folded beta-sheets drive condensate assembly, enabling new applications in bacterial imaging and antimicrobial therapy.

Keywords:
bacterial responsivebeta sheetbiomolecular condensatecomplex coacervatepeptide

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Split-and-pool Synthesis and Characterization of Peptide Tertiary Amide Library
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Split-and-pool Synthesis and Characterization of Peptide Tertiary Amide Library

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Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
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Solid-phase Submonomer Synthesis of Peptoid Polymers and their Self-Assembly into Highly-Ordered Nanosheets
13:42

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Split-and-pool Synthesis and Characterization of Peptide Tertiary Amide Library
13:37

Split-and-pool Synthesis and Characterization of Peptide Tertiary Amide Library

Published on: June 20, 2014

Area of Science:

  • Biochemistry and Materials Science
  • Focuses on the physical chemistry of biological systems and the design of novel peptide-based materials.

Background:

  • Biomolecular condensates form via liquid-liquid phase separation, primarily of intrinsically disordered proteins.
  • The role of molecular ordering in condensate formation is underexplored but crucial for mechanistic understanding and peptide design.

Purpose of the Study:

  • To systematically investigate how molecular ordering impacts peptide phase behavior.
  • To explore the design principles for creating functional condensates using peptides.

Main Methods:

  • Utilized multidomain peptides (MDPs) designed with a molecular frustration principle, incorporating domains favoring beta-sheet assembly and disassembly.
  • Programmed individual domains within MDPs to control secondary structure and study their effect on phase behavior.
  • Investigated coacervate formation between MDPs and synthetic anionic polymers.
  • Demonstrated enzyme-triggered condensation using phosphorylated MDPs and alkaline phosphatase.

Main Results:

  • Peptide phase behavior is significantly dictated by secondary structure, with partially folded beta-sheets being key drivers of condensate formation.
  • Complex coacervates formed with synthetic polymers showed enhanced stability.
  • Enzyme-triggered condensation was successfully achieved, demonstrating a molecular switch mechanism.

Conclusions:

  • Molecular ordering, particularly partially folded beta-sheets, is critical for driving peptide-based biomolecular condensate formation.
  • MDPs offer a versatile platform for designing functional condensates with tunable properties and stability.
  • Enzyme-responsive peptide condensates hold promise for applications in bacterial imaging and antimicrobial therapy development.