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Related Concept Videos

Aquaporins01:25

Aquaporins

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Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
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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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Multi-pass Transmembrane Proteins and β-barrels01:09

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In multi-pass transmembrane proteins, the polypeptide chain crosses the membrane more than once. The transmembrane polypeptide chain either forms an α-helix or β-strand structure. α-Helix containing multi-pass transmembrane proteins are ubiquitous, whereas β-strand containing ones are mainly found in gram-negative bacteria, mitochondria, and chloroplasts.
α-Helix containing multi-pass transmembrane proteins
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The Significance of Membrane Transport01:44

The Significance of Membrane Transport

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The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
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Protein Networks02:26

Protein Networks

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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.
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Structure of Porins01:21

Structure of Porins

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Mitochondria, chloroplasts, and gram-negative bacteria have transmembrane, beta-barrel proteins called porins to mediate the free diffusion of ions and metabolites across the membrane. Mitochondrial porin precursors contain conserved amino acid sequences called beta signals at their C-terminal. Beta signals have a  motif of PoXGXXHyXHy (Po-Polar, X-Any amino acid, G-Glycine, Hy-LargeHydrophobic), which are crucial for precursor recognition to initiate precursor assembly. Beta-barrel...
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Insight into the Mammalian Aquaporin Interactome.

Susanna Törnroth-Horsefield1, Clara Chivasso2, Helin Strandberg1

  • 1Division of Biochemistry and Structural Biology, Lund University, 22 100 Lund, Sweden.

International Journal of Molecular Sciences
|September 9, 2022
PubMed
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Aquaporins (AQPs) are water channels crucial for cell function. Understanding their protein interactions (interactomes) offers new therapeutic strategies for diseases where targeting single AQPs has failed.

Keywords:
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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Physiology

Background:

  • Aquaporins (AQPs) are transmembrane channels facilitating water and small solute transport across cell membranes.
  • Protein-protein interactions are critical for regulating protein function and cellular processes.
  • Dysregulation of AQPs is implicated in various human diseases.

Purpose of the Study:

  • To provide a comprehensive review of the Aquaporin (AQP) interactomes.
  • To elucidate the molecular basis and functional significance of AQP protein-protein interactions.
  • To explore the therapeutic potential of targeting AQP interactomes.

Main Methods:

  • Literature review of existing studies on Aquaporin (AQP) interactions.
  • Analysis of data on protein-protein interaction networks involving AQPs.
  • Synthesis of information on the role of AQP interactomes in physiological and pathological conditions.

Main Results:

  • Identified diverse protein partners interacting with various Aquaporin (AQP) members.
  • Detailed the molecular mechanisms underlying these protein-protein interactions.
  • Highlighted the functional impact of AQP interactomes in cellular water homeostasis and solute transport.
  • Linked aberrant AQP interactomes to specific disease pathologies.

Conclusions:

  • Aquaporin (AQP) interactomes play fundamental roles in regulating water and solute transport.
  • Understanding these interactions is key to deciphering AQP function in health and disease.
  • Targeting AQP interactomes presents a promising, albeit challenging, therapeutic strategy for AQP-related disorders.