Related Experiment Video
Updated: Feb 26, 2026
10:40
Assessment of Dictyostelium discoideum Response to Acute Mechanical Stimulation
Published on: November 9, 2017
7.4K
Yeast chemotropism: A paradigm shift in chemical gradient sensing
1Department of Cell and Developmental Biology, University of Colorado, Denver Anschutz Medical Campus, Aurora, CO, USA.
Cellular Logistics
|July 14, 2017
Summary
Cells sense chemical gradients using two distinct mechanisms: biased polarity complex movement and differential receptor internalization. These processes work together to interpret mating pheromone gradients, crucial for eukaryotic cell life cycles.
Area of Science:
- Cellular biology
- Biochemistry
- Molecular biology
Background:
- Cellular directional movement and growth are vital for eukaryotic life cycles.
- Chemotaxis signaling is well-understood, but chemotropism gradient interpretation remains unclear.
Purpose of the Study:
- To investigate how chemotropic cells interpret chemical gradients.
- To explore the synergistic roles of two identified mechanisms in gradient sensing.
Main Methods:
- Analysis of recent studies on budding and fission yeast chemotropism.
- Comparative examination of polarity complex dynamics and receptor-G protein internalization.
Main Results:
- Two distinct chemotropism mechanisms identified in yeast: biased polarity complex wandering and differential receptor-G protein internalization.
- Both mechanisms are proposed to be critical for decoding mating pheromone gradients.
Conclusions:
- The two mechanisms likely function collaboratively as a unified gradient sensing machine.
- Understanding this integrated system is key to deciphering cellular responses to chemical cues.
Keywords:
GPCRchemical gradient sensingchemotropismheterotrimeric G proteinpheromone responseyeast matingMore Related Videos
Related Concept Videos
01:27Chemotaxis in E. coli
1.1K
Chemotaxis in Escherichia coli is a sensory-driven motility mechanism that enables bacteria to navigate chemical gradients, moving toward beneficial environments while avoiding harmful conditions. This process relies on a signal transduction system integrating external chemical cues with flagellar motor control.Chemoreceptors and Signal DetectionE. coli detects chemical gradients through methyl-accepting chemotaxis proteins (MCPs), which are membrane-bound chemoreceptors that sense attractants...
1.1K
01:21Chemotaxis and Direction of Cell Migration
5.9K
Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
5.9K
01:28Yeast Signaling
18.3K
Yeasts are single-celled organisms, but unlike bacteria, they are eukaryotes (cells with a nucleus). Cell signaling in yeast is similar to signaling in other eukaryotic cells. A ligand, such as a protein or a small molecule released from a yeast cell, attaches to a receptor on the cell surface. The binding stimulates second-messenger kinases to activate or inactivate transcription factors that further regulate gene expression. Many of the yeast intracellular signaling cascades have similar...
18.3K
01:21Electrochemical Gradient and Channel Proteins: An Overview
4.9K
An electrochemical gradient is a fundamental concept in biology and chemistry. It regulates the movement of ions across cell membranes. This movement is influenced by two factors:
The electrical gradient: The electrical gradient across cell membranes refers to the difference in electric charge between the inside and outside of a cell. This difference drives the movement of ions towards or away from the cells. For instance, if the inside of the cell is more negatively charged relative to...
The electrical gradient: The electrical gradient across cell membranes refers to the difference in electric charge between the inside and outside of a cell. This difference drives the movement of ions towards or away from the cells. For instance, if the inside of the cell is more negatively charged relative to...
4.9K
01:32Chemiosmosis
115.6K
Oxidative phosphorylation is a highly efficient process that generates large amounts of adenosine triphosphate (ATP), the basic unit of energy that drives many cellular processes. Oxidative phosphorylation involves two processes— the electron transport chain and chemiosmosis.
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
115.6K