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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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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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Protein Families02:47

Protein Families

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Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism.   Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members.   If these new proteins contain similar amino acids in key...
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Protein Complex Assembly02:41

Protein Complex Assembly

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Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

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Proteomics01:33

Proteomics

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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
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Updated: Sep 2, 2025

Identification of Protein Complexes in Escherichia coli using Sequential Peptide Affinity Purification in Combination with Tandem Mass Spectrometry
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Uncovering protein function: from classification to complexes.

Rhiannon Morris1,2, Katrina A Black1,2, Elliott J Stollar3

  • 1Walter and Eliza Hall Institute, 1G Royal Parade, Parkville, 3052, VIC, Australia.

Essays in Biochemistry
|August 10, 2022
PubMed
Summary
This summary is machine-generated.

Proteins are essential for life, performing diverse biological roles like catalysis and signaling. This article explores protein functions, binding, and how laboratory techniques are used to study them.

Keywords:
biochemical techniques and resourcespost translational modificationprotein binding

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Area of Science:

  • Biochemistry
  • Molecular Biology

Background:

  • Proteins are fundamental to all biological processes, acting as catalysts, structural components, and signaling molecules.
  • Their diverse functions, including signal transduction, gene transcription, and immune response, underscore their critical importance in living organisms.

Purpose of the Study:

  • To provide a comprehensive overview of protein functions and their significance in biological systems.
  • To discuss the mechanisms that regulate protein function, such as post-translational modifications and environmental factors.
  • To introduce common laboratory techniques used for studying and measuring protein function.

Main Methods:

  • Review of existing literature on protein functions and classification.
  • Detailed examination of protein binding as a key determinant of function.
  • Discussion of methods for analyzing protein function, including post-translational modification, environmental influences, oligomerization, and mutations.

Main Results:

  • Proteins exhibit a wide array of functions essential for organism survival and operation.
  • Protein function is intricately linked to protein binding interactions.
  • Various factors, including modifications and environmental changes, can alter protein function.

Conclusions:

  • Understanding protein function is crucial for comprehending biological mechanisms.
  • A variety of experimental techniques are available for the detailed study of protein function.
  • The study of proteins is vital for advancements in medicine and biotechnology.