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Related Concept Videos

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...
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...
Protein Folding01:22

Protein Folding

Overview
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...
Protein Folding01:22

Protein Folding

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Protein and Protein Structure02:15

Protein and Protein Structure

Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme can...

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NMR 15N Relaxation Experiments for the Investigation of Picosecond to Nanoseconds Structural Dynamics of Proteins
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Structural disorder and protein elasticity.

Sarah Rauscher1, Régis Pomès

  • 1Molecular Structure and Function, Hospital for Sick Children, Toronto, Canada.

Advances in Experimental Medicine and Biology
|March 9, 2012
PubMed
Summary
This summary is machine-generated.

Disordered elastomeric proteins provide essential elasticity to biological tissues, driven by polypeptide chain entropy. Understanding their sequence-structure-function link aids in designing advanced elastic biomaterials.

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Area of Science:

  • Biophysics
  • Materials Science
  • Biomaterials Engineering

Background:

  • Biological tissues rely on elastomeric proteins for elasticity.
  • These proteins are crucial in diverse biological functions, from arterial walls to insect locomotion.
  • Structural disorder plays a key role in protein elasticity.

Purpose of the Study:

  • To review the molecular basis of protein elasticity.
  • To explore the functional role of structural disorder in elastomeric proteins.
  • To discuss five specific rubber-like elastomeric proteins: elastin, resilin, spider silk, abductin, and ColP.

Main Methods:

  • Review of existing literature on protein elasticity and disorder.
  • Analysis of sequence, structure, and function relationships in elastomeric proteins.
  • Discussion of entropic and energetic contributions to protein elastic recoil.

Main Results:

  • Protein elasticity arises from a combination of internal energy and entropy.
  • Rubber-like elastomeric proteins are primarily driven by increased entropy in the relaxed state.
  • These proteins exhibit intrinsic disorder or 'fuzziness' with high polypeptide chain entropy.

Conclusions:

  • Disordered elastomeric proteins display diverse sequence motifs, mechanical properties, and functions.
  • Understanding sequence modulation of disorder and elasticity is key for biomaterial design.
  • This knowledge can advance the rational design of elastic biomaterials like artificial skin and vascular grafts.