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Related Concept Videos

Phosphorylation01:02

Phosphorylation

The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
Phosphorylation01:02

Phosphorylation

The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
Roles of Electrolytes: Calcium and Phosphate01:27

Roles of Electrolytes: Calcium and Phosphate

Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
The calcium concentration in blood plasma is primarily regulated...
Protein Kinases and Phosphatases02:54

Protein Kinases and Phosphatases

Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Calmodulin-dependent Signaling01:16

Calmodulin-dependent Signaling

Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
Amplifying Signals via Second Messengers01:15

Amplifying Signals via Second Messengers

Many receptor binding ligands are hydrophilic; they do not cross the cell membrane but bind to cell-surface receptors. Thus, their message must be relayed by second messengers present in the cell cytoplasm. There are several second messenger pathways, each with its own way of relaying information. For example, the G protein-coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol pathway is active when the receptor induces...

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Related Experiment Video

Updated: May 18, 2026

Identification of Inositol Phosphate or Phosphoinositide Interacting Proteins by Affinity Chromatography Coupled to Western Blot or Mass Spectrometry
08:07

Identification of Inositol Phosphate or Phosphoinositide Interacting Proteins by Affinity Chromatography Coupled to Western Blot or Mass Spectrometry

Published on: July 26, 2019

Phosphate as a sensor and signaling molecule.

Yves Sabbagh1

  • 1Sanofi-Genzyme R & D Center, Genzyme, Framingham, MA, USA. yves.sabbagh@genzyme.com

Clinical Nephrology
|September 26, 2012
PubMed
Summary
This summary is machine-generated.

Maintaining phosphate homeostasis is crucial for health. This review explores evidence for phosphate sensing mechanisms in eukaryotes, drawing parallels with the well-studied bacterial Pho regulon.

More Related Videos

Assaying for Inorganic Polyphosphate in Bacteria
07:20

Assaying for Inorganic Polyphosphate in Bacteria

Published on: January 21, 2019

Related Experiment Videos

Last Updated: May 18, 2026

Identification of Inositol Phosphate or Phosphoinositide Interacting Proteins by Affinity Chromatography Coupled to Western Blot or Mass Spectrometry
08:07

Identification of Inositol Phosphate or Phosphoinositide Interacting Proteins by Affinity Chromatography Coupled to Western Blot or Mass Spectrometry

Published on: July 26, 2019

Assaying for Inorganic Polyphosphate in Bacteria
07:20

Assaying for Inorganic Polyphosphate in Bacteria

Published on: January 21, 2019

Area of Science:

  • Cellular Biology
  • Physiology
  • Biochemistry

Background:

  • Inorganic phosphate is vital for prokaryotic and eukaryotic cellular processes.
  • Proper phosphate homeostasis is essential; deviations cause disease.
  • Phosphate sensing and signaling mechanisms maintain physiological levels.

Purpose of the Study:

  • To review evidence for phosphate sensing mechanisms in eukaryotes.
  • To highlight parallels between eukaryotic mechanisms and the bacterial Pho regulon.
  • To examine inter-organ crosstalk in phosphate regulation.

Main Methods:

  • Literature review focusing on phosphate homeostasis.
  • Analysis of signaling pathways including Pho regulon and protein kinase A (PKA).
  • Examination of kidney-parathyroid, kidney-intestinal, parathyroid-intestinal, kidney-bone, and parathyroid-bone axes.

Main Results:

  • The Pho regulon in yeast and bacteria is a well-characterized phosphate sensing system.
  • Protein kinase A (PKA) signaling is involved in phosphate metabolism.
  • Inter-organ crosstalk provides evidence for eukaryotic phosphate sensing mechanisms.

Conclusions:

  • Eukaryotic phosphate sensing is complex due to multiple organ involvement.
  • Parallels exist between eukaryotic phosphate regulation and the Pho regulon.
  • Understanding these axes is key to maintaining phosphate homeostasis and preventing disease.