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Related Concept Videos

Mitochondrial Protein Sorting01:39

Mitochondrial Protein Sorting

Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death.  Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
Mitochondrial Precursor Proteins01:39

Mitochondrial Precursor Proteins

Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70  chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial precursors...
Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Allosteric Proteins-ATCase01:19

Allosteric Proteins-ATCase

Binding sites linkages can regulate a protein's function.  For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to  N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis pathway,...
The ADP/ATP Carrier Protein01:42

The ADP/ATP Carrier Protein

ADP/ATP carrier or AAC protein is the most abundant carrier protein in the inner mitochondrial membrane. It transports large quantities of ADP and ATP, equivalent to the average human body weight, every day. Among other transporters, ACC protein is one of the best-studied members of the mitochondrial carrier protein family. The ADP/ATP carrier protein comprises two transmembrane helices connected to a loop and a single alpha-helix on the matrix side. It switches between two conformational...
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.

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The Use of the Patch-Clamp Technique to Study the Thermogenic Capacity of Mitochondria
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UCP2, a mitochondrial protein regulated at multiple levels.

Massimo Donadelli1, Ilaria Dando, Claudia Fiorini

  • 1Section of Biochemistry, Deparment of Life and Reproduction Sciences, University of Verona, Strada Le Grazie 8, 37134, Verona, Italy, massimo.donadelli@univr.it.

Cellular and Molecular Life Sciences : CMLS
|June 29, 2013
PubMed
Summary

Uncoupling protein 2 (UCP2) plays a key role in health and disease. This review details UCP2 regulation at the gene, mRNA, protein, and functional levels, offering insights for therapeutic strategies.

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Published on: February 25, 2016

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Physiology

Background:

  • Uncoupling protein 2 (UCP2) is implicated in numerous physiological and pathological processes.
  • Understanding UCP2's molecular regulation is crucial for deciphering its roles and developing therapeutic interventions.
  • Research into UCP2 regulation is rapidly advancing, revealing complex mechanisms.

Purpose of the Study:

  • To review recent findings on the molecular mechanisms regulating UCP2.
  • To provide a comprehensive overview of UCP2 regulation at multiple levels.
  • To highlight the implications for understanding UCP2-related physiology and disease.

Main Methods:

  • This review synthesizes current research on UCP2 regulation.
  • It examines findings related to UCP2 gene mutations (SNPs).
  • It covers regulation of UCP2 mRNA and protein expression, including transcriptional, translational, and protein turnover.
  • It discusses UCP2 proton conductance modulation via ligands and post-transcriptional modifications.
  • It explores nutritional and pharmacological influences on UCP2.

Main Results:

  • UCP2 is regulated through a multi-faceted approach involving genetic, post-transcriptional, and epigenetic mechanisms.
  • Single nucleotide polymorphisms (SNPs) in the Ucp2 gene can impact its function.
  • Expression levels are controlled by transcriptional, translational, and protein degradation pathways.
  • UCP2's proton leak activity is modulated by specific ligands and post-transcriptional modifications.
  • Nutritional status and pharmacological agents significantly influence UCP2 activity and expression.

Conclusions:

  • UCP2 regulation is complex and occurs at multiple molecular levels.
  • A thorough understanding of these regulatory mechanisms is essential for therapeutic targeting of UCP2.
  • This review consolidates recent advances, providing a foundation for future research in UCP2 modulation.