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Related Concept Videos

Protein Networks02:26

Protein Networks

4.1K
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.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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Overview of Cell-Matrix Interactions01:24

Overview of Cell-Matrix Interactions

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The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
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Protein-protein Interfaces02:04

Protein-protein Interfaces

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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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Matrix Proteoglycans and Glycoproteins01:21

Matrix Proteoglycans and Glycoproteins

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Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
4.2K
Fibrous Proteins00:55

Fibrous Proteins

3.6K
Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...
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Fibronectins Connect Cells with ECM01:25

Fibronectins Connect Cells with ECM

2.6K
Fibronectin is an adhesive glycoprotein present in the extracellular matrix of embryogenic and adult tissue. These molecules primarily aid in regulating cell motility and attachment. A fibronectin molecule is composed of two identical polypeptide chains attached to each other by a pair of disulfide bonds at the C-terminal.
Both proteoglycans and collagen are attached to fibronectin proteins, which, in turn, are attached to integrin proteins. These integrin proteins interact with transmembrane...
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Updated: Oct 7, 2025

JUMPn: A Streamlined Application for Protein Co-Expression Clustering and Network Analysis in Proteomics
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Fibrosis Protein-Protein Interactions from Google Matrix Analysis of MetaCore Network.

Ekaterina Kotelnikova1, Klaus M Frahm2, Dima L Shepelyansky2

  • 1Clarivate Analytics, 08025 Barcelona, Spain.

International Journal of Molecular Sciences
|January 11, 2022
PubMed
Summary
This summary is machine-generated.

This study predicts protein-protein interactions involved in cardiac fibrosis, a key factor in heart failure. The findings identify new therapeutic targets for limiting myocardial fibrosis.

Keywords:
Google matrixMarkov chainsdirected networksfibrosisprotein–protein interactions

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Area of Science:

  • Cardiovascular Biology
  • Computational Biology
  • Biochemistry

Background:

  • Protein-protein interactions are crucial in cardiac remodeling and heart failure.
  • Cardiac fibrosis is a major cause of end-stage heart failure.

Purpose of the Study:

  • To predict protein-protein interactions driving cardiac fibrosis using network and matrix algorithms.
  • To identify novel therapeutic targets for myocardial fibrosis.

Main Methods:

  • Utilized MetaCore network analysis.
  • Applied Google matrix algorithms for interaction prediction.
  • Validated findings in mouse and human cardiac tissues.

Main Results:

  • Identified key protein interactions involved in cardiac fibrosis.
  • Predicted novel protein actors regulating fibroblast activation.
  • Provided insights into mechanisms of myocardial fibrosis.

Conclusions:

  • The developed algorithms effectively predict protein-protein interactions in cardiac fibrosis.
  • This research offers potential new therapeutic strategies for heart failure by targeting fibrosis.