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Related Concept Videos

Protein-protein Interfaces02:04

Protein-protein Interfaces

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 polypeptide...
Protein-Protein Interfaces02:04

Protein-Protein Interfaces

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 polypeptide...
Unsymmetric Loading of Thin-Walled Members01:23

Unsymmetric Loading of Thin-Walled Members

Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
The concept of the shear center is crucial in countering the...
Anchoring Junctions01:03

Anchoring Junctions

Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...
Stress Concentrations01:24

Stress Concentrations

Stress concentration is when stress intensifies near discontinuities such as holes or abrupt cross-sectional changes in a structural member. This localized stress can often surpass the average stress within the member. The stress distribution in flat bars, either with a circular hole or varying widths connected by fillets, can be determined experimentally using a photoelastic method. The results are based on ratios of geometric parameters like the ratio of the hole's radius to the smaller width...
Stress Concentrations01:13

Stress Concentrations

The concept of stress concentration is crucial for understanding how materials respond under bending stresses, particularly when there are irregularities or discontinuities in the material's geometry. Normally, stress in a symmetric member subjected to pure bending is assumed to be uniformly distributed across the entire cross-section. However, this assumption does not hold when there are variations in the cross-sectional geometry or the presence of notches and holes.
The stress concentration...

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Related Experiment Video

Updated: Jun 27, 2026

Designing Silk-silk Protein Alloy Materials for Biomedical Applications
11:14

Designing Silk-silk Protein Alloy Materials for Biomedical Applications

Published on: August 13, 2014

What can we learn from highly connected beta-rich structures for structural interface design?

Ugur Emekli1, K Gunasekaran, Ruth Nussinov

  • 1Polymer Research Center and Chemical Engineering Department, Bogaziçi University, Istanbul, Turkey.

Methods in Molecular Biology (Clifton, N.J.)
|November 26, 2008
PubMed
Summary
This summary is machine-generated.

Highly connected beta-rich proteins possess conserved core residues, distinguishing them from less connected ones. This structural feature may prevent amyloid polymerization, aiding in protein design.

Related Experiment Videos

Last Updated: Jun 27, 2026

Designing Silk-silk Protein Alloy Materials for Biomedical Applications
11:14

Designing Silk-silk Protein Alloy Materials for Biomedical Applications

Published on: August 13, 2014

Area of Science:

  • Biochemistry
  • Structural Biology
  • Proteomics

Background:

  • Protein hubs are crucial for cellular interactions, with many exhibiting transient binding capabilities.
  • Beta-rich proteins, particularly hubs, present a design challenge due to their potential for amyloid fibril formation.
  • Understanding features distinguishing high-connectivity from low-connectivity beta-rich proteins is key for interface design.

Purpose of the Study:

  • To identify distinguishing structural features of highly connected beta-rich protein hubs.
  • To explore properties that differentiate these hubs from low-connectivity beta-rich proteins.
  • To inform protein interface design strategies that avoid undesirable polymerization.

Main Methods:

  • Classification of proteins from the yeast interaction map based on secondary structure.
  • Analysis of Protein Data Bank structures for beta-rich proteins.
  • Comparative analysis of conserved residue clusters in the cores of high- and low-connectivity beta-rich proteins.

Main Results:

  • Highly connected beta-rich proteins characteristically display clusters of conserved residues within their cores.
  • Low-connectivity beta-rich proteins lack such prominent conserved core clusters.
  • This conserved core structure appears crucial for the stability of beta-rich proteins prone to amyloid formation.

Conclusions:

  • Conserved, tightly packed cores in beta-rich hubs contribute to protein stability.
  • Enhanced stability may inhibit partial unfolding, reducing the likelihood of amyloid polymerization.
  • These findings offer insights for designing protein interfaces that mitigate fibrillation risks.