Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Roles of Electrolytes: Sodium and Potassium01:24

Roles of Electrolytes: Sodium and Potassium

1.8K
Sodium plays a crucial role in maintaining fluid and electrolyte balance and overall bodily homeostasis. Sodium balance is primarily regulated by kidney function, which adjusts sodium elimination to match dietary intake and maintain proper electrolyte levels. Sodium is the most abundant cation in the extracellular fluid (ECF) and is found in salts such as sodium chloride (NaCl) and sodium bicarbonate (NaHCO3). Although cellular plasma membranes are relatively impermeable to sodium, its role in...
1.8K
Primary Active Transport01:47

Primary Active Transport

195.6K
In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps that are embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction...
195.6K
Primary Active Transport01:29

Primary Active Transport

13.4K
In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction they would...
13.4K
ATP Driven Pumps I: An Overview01:27

ATP Driven Pumps I: An Overview

9.6K
ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
9.6K
Antihypertensive Drugs: Potassium-Sparing Diuretics01:28

Antihypertensive Drugs: Potassium-Sparing Diuretics

2.1K
Liddle syndrome is a genetically inherited form of hypertension characterized by the overactivity of epithelial sodium channels in the nephron, the functional unit of the kidney. This heightened activity leads to increased sodium reabsorption and excessive excretion of potassium. To counteract this, potassium-sparing diuretics such as amiloride are used. They function by blocking these sodium channels, thereby reducing the influx of sodium into the epithelial cells and minimizing the loss of...
2.1K
Regulation of Sodium and Potassium01:26

Regulation of Sodium and Potassium

1.9K
The regulation of sodium and potassium ion concentrations in the human body is a complex process governed primarily by hormones such as aldosterone, antidiuretic hormone (ADH), and atrial natriuretic peptide (ANP).
Sodium Regulation
Sodium ions make up approximately 90% of extracellular cations, with a normal blood plasma concentration of 136–148 mEq/L. A decrease in blood volume and pressure triggers the release of renin from granular cells in the juxtaglomerular complex (JGC), primarily...
1.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A portable Cas6f-based system for multiplex translational repression in bacteria.

Nature communications·2026
Same author

Mind the Porins: Differential Effects of Porin Knockouts and Overexpression on Glucose and Xylose Uptake and Utilization in Pseudomonas putida.

Microbial biotechnology·2026
Same author

Cascading recombinase memory switch for programmable and stable gene expression in Pseudomonas putida.

Nucleic acids research·2026
Same author

Professional Academies: The Duty to Lead.

Microbial biotechnology·2026
Same author

Natural and Synthetic Metabolic Architectures.

Chembiochem : a European journal of chemical biology·2026
Same author

Adaptive evolution of <i>Pseudomonas putida</i> in the presence of fluoride exposes novel functions of a benzoate transporter.

Journal of bacteriology·2026

Related Experiment Video

Updated: Jan 5, 2026

Making, Testing, and Using Potassium Ion Selective Microelectrodes in Tissue Slices of Adult Brain
11:20

Making, Testing, and Using Potassium Ion Selective Microelectrodes in Tissue Slices of Adult Brain

Published on: May 7, 2018

12.6K

Why Nature Chose Potassium.

Antoine Danchin1,2, Pablo Iván Nikel3

  • 1Institut Cochin INSERM U1016 - CNRS UMR8104 - Université Paris Descartes, Paris, France. antoine.danchin@normalesup.org.

Journal of Molecular Evolution
|October 30, 2019
PubMed
Summary

The role of potassium (K+) in early life is debated. While sodium is more abundant in seawater, K+ is crucial for translation and unique metabolic pathways, suggesting it may have been positively selected during evolution.

Keywords:
AbiogenesisLandauer’s principleRibosomeSplicingWater structurenanoRNases

More Related Videos

Measuring Fluxes of Mineral Nutrients and Toxicants in Plants with Radioactive Tracers
13:14

Measuring Fluxes of Mineral Nutrients and Toxicants in Plants with Radioactive Tracers

Published on: August 22, 2014

11.7K
Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays
12:48

Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays

Published on: February 19, 2013

11.0K

Related Experiment Videos

Last Updated: Jan 5, 2026

Making, Testing, and Using Potassium Ion Selective Microelectrodes in Tissue Slices of Adult Brain
11:20

Making, Testing, and Using Potassium Ion Selective Microelectrodes in Tissue Slices of Adult Brain

Published on: May 7, 2018

12.6K
Measuring Fluxes of Mineral Nutrients and Toxicants in Plants with Radioactive Tracers
13:14

Measuring Fluxes of Mineral Nutrients and Toxicants in Plants with Radioactive Tracers

Published on: August 22, 2014

11.7K
Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays
12:48

Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays

Published on: February 19, 2013

11.0K

Area of Science:

  • Biochemistry
  • Astrobiology
  • Origin of Life Research

Background:

  • Most atoms in living cells are explained by physico-chemical properties.
  • Potassium cation (K+) involvement in life's origins is mysterious due to lower abundance than sodium in seawater.
  • K+ plays roles in essential cellular functions like electrochemical potential and osmolarity, which sodium could also fulfill.

Purpose of the Study:

  • To investigate whether potassium's presence in life is due to specific advantageous properties or an accidental origin in a potassium-rich environment.
  • To explore the unique roles of K+ in biological systems, particularly in translation and methylglyoxal metabolism.

Main Methods:

  • Review of existing literature on the physico-chemical properties of K+.
  • Analysis of K+'s role in key cellular processes, including translation and metabolism.
  • Comparison of K+ and sodium (Na+) roles in the context of early Earth environments.

Main Results:

  • Potassium is essential for a functional translation machinery.
  • K+ is involved in a unique metabolic pathway utilizing methylglyoxal.
  • Specific physico-chemical properties of K+ may favor its selection in biological systems.

Conclusions:

  • Potassium's unique properties might have led to its positive selection during the evolution of life.
  • Alternatively, life may have originated in a potassium-rich environment, making its presence a 'frozen accident'.