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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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Endocrine Signaling01:45

Endocrine Signaling

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Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.
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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.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
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Reabsorption and Secretion in the DCT and Collecting Duct01:26

Reabsorption and Secretion in the DCT and Collecting Duct

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The early phase of the DCT manages the reabsorption of approximately 10-15% of filtered water, 5–10% of filtered sodium, and 5–10% of filtered chloride. This process is facilitated by Na+–Cl− symporters in apical membranes and sodium-potassium pumps, as well as Cl− leakage channels in basolateral membranes. The early DCT also stands out as a site where parathyroid hormone (PTH) stimulates calcium reabsorption, depending on the body's requirements.
The distal...
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Physiology of the Genitourinary System II: Tubular Reabsorption and Secretion01:22

Physiology of the Genitourinary System II: Tubular Reabsorption and Secretion

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The kidneys maintain homeostasis through filtration, reabsorption, and secretion. Tubular reabsorption and secretion are crucial in forming urine and regulating electrolytes, water balance, and waste elimination.Tubular Reabsorption and Secretion ProcessesTubular reabsorption is the process that reclaims essential substances such as electrolytes, glucose, amino acids, and water from the glomerular filtrate back into the bloodstream. This is achieved through passive and active transport...
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ATP Driven Pumps III: V-type Pumps01:30

ATP Driven Pumps III: V-type Pumps

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V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
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Culturing Primary Rat Inner Medullary Collecting Duct Cells
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Proteomics and AQP2 regulation.

Chin-Rang Yang1, Euijung Park1, Lihe Chen1

  • 1Epithelial Systems Biology Laboratory, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD, USA.

The Journal of Physiology
|December 26, 2022
PubMed
Summary
This summary is machine-generated.

Modern proteomics and systems biology enable deep understanding of how vasopressin regulates water channels. This research details molecular mechanisms crucial for water balance and related disorders.

Keywords:
AQP2aquaporin‐2collecting ductkidneynext‐generation DNA sequencingphosphoproteomicsprotein kinase Aprotein mass spectrometryproteomicsvasopressin

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Physiology

Background:

  • Quantitative mass spectrometry has revolutionized biology, enabling 'systems biology' approaches.
  • These techniques allow for the identification and quantification of thousands of proteins and their post-translational modifications, such as phosphorylation.

Purpose of the Study:

  • To discuss modern quantitative protein mass spectrometry methodologies.
  • To demonstrate the application of these methods in understanding vasopressin's regulation of the aquaporin-2 water channel.
  • To elucidate the molecular mechanisms underlying water balance disorders.

Main Methods:

  • Quantitative protein mass spectrometry
  • Proteomics
  • Analysis of post-translational modifications (phosphorylation)
  • Investigation of peptide hormone signaling pathways

Main Results:

  • Identification and quantification of numerous proteins and their modifications.
  • Detailed insights into the molecular regulation of aquaporin-2 by vasopressin.
  • A comprehensive framework for understanding water balance.

Conclusions:

  • Quantitative proteomics is a powerful tool for systems biology research.
  • Vasopressin's regulation of aquaporin-2 involves complex molecular mechanisms.
  • This framework aids in understanding and potentially treating water balance disorders.