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Related Concept Videos

Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
Coupled Reactions01:17

Coupled Reactions

Cellular processes such as building and breaking down complex molecules occur through stepwise chemical reactions. Some of these chemical reactions are spontaneous and release energy, whereas others require energy to proceed. Cells often couple the energy-releasing reaction with the energy-requiring one to carry out important cell functions. 
Energy in adenosine triphosphate or ATP molecules is easily accessible to do work. ATP powers the majority of energy-requiring cellular reactions. Cells...
Electrochemical Gradient and Channel Proteins: An Overview01:21

Electrochemical Gradient and Channel Proteins: An Overview

An electrochemical gradient is a fundamental concept in biology and chemistry. It regulates the movement of ions across cell membranes. This movement is influenced by two factors:
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Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...

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Uncoupling proteins: molecular, functional, regulatory, physiological and pathological aspects.

Francis E Sluse1

  • 1Department of Life Sciences, University of Liege, Liege, Belgium. F.Sluse@ulg.ac.be

Advances in Experimental Medicine and Biology
|March 9, 2012
PubMed
Summary

Uncoupling proteins (UCPs) regulate energy by controlling proton flow across the inner mitochondrial membrane. Their activation and regulation mechanisms are conserved, impacting physiological and pathological processes.

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Area of Science:

  • Biochemistry
  • Mitochondrial Biology
  • Cellular Respiration

Background:

  • Uncoupling proteins (UCPs) are a mitochondrial anion carrier subfamily found across eukaryotes.
  • They facilitate proton flux, uncoupling respiration from ATP synthesis.
  • Tissue-specific isoforms exist in higher organisms.

Purpose of the Study:

  • To review current knowledge on uncoupling proteins.
  • To introduce a new methodology for studying UCP activity during respiration.
  • To elucidate common mechanisms of UCP activation and regulation.

Main Methods:

  • Description of current knowledge on uncoupling proteins.
  • Introduction of a novel methodology for studying UCP activity and regulation during phosphorylating respiration.
  • Analysis of the role of ubiquinone reduction level in UCP regulation.

Main Results:

  • All uncoupling proteins share common activation and regulation mechanisms.
  • The reduction level of ubiquinone is central to UCP regulation.
  • Established a new method to study UCPs during phosphorylating respiration.

Conclusions:

  • Understanding UCP function and regulation is crucial for comprehending their physiological and pathological roles.
  • UCPs are implicated in thermogenesis, reactive oxygen species (ROS) prevention, and energy flow.
  • UCPs play a role in various pathological disorders.