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Related Concept Videos

Chemotaxis in E. coli01:27

Chemotaxis in E. coli

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...
Chemotaxis and Direction of Cell Migration01:21

Chemotaxis and Direction of Cell Migration

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 towards...

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Related Experiment Video

Updated: Jun 17, 2026

Imaging G Protein-coupled Receptor-mediated Chemotaxis and its Signaling Events in Neutrophil-like HL60 Cells
08:24

Imaging G Protein-coupled Receptor-mediated Chemotaxis and its Signaling Events in Neutrophil-like HL60 Cells

Published on: September 14, 2016

Deciphering chemotaxis pathways using cross species comparisons.

Rebecca Hamer1, Pao-Yang Chen, Judith P Armitage

  • 1Department of Statistics, University of Oxford, Oxford, UK.

BMC Systems Biology
|January 13, 2010
PubMed
Summary
This summary is machine-generated.

Many bacteria possess multiple chemotaxis pathways, with gene organization into operons maintaining pathway distinctness. Specific gene pairings like CheA-CheW and CheR-CheB suggest functional linkage, while CheY

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Last Updated: Jun 17, 2026

Imaging G Protein-coupled Receptor-mediated Chemotaxis and its Signaling Events in Neutrophil-like HL60 Cells
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Published on: September 14, 2016

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11:37

Measurement of Cellular Chemotaxis with ECIS/Taxis

Published on: April 1, 2012

Area of Science:

  • Bacterial signaling pathways
  • Microbial chemotaxis mechanisms
  • Comparative genomics

Background:

  • Chemotaxis enables motile bacteria to navigate chemical gradients.
  • While Escherichia coli has a single pathway, complex systems in other bacteria are less understood.

Purpose of the Study:

  • Investigate if bacterial chemotaxis pathways mirror the E. coli model.
  • Analyze gene organization and co-transcription of chemotaxis proteins across diverse species.

Main Methods:

  • Analyzed 206 bacterial species for core chemotaxis genes (CheA, CheB, CheR, CheW, CheY).
  • Developed a statistical approach to cluster genes into putative operons.
  • Reconstructed and compared chemotaxis pathways using operon models.

Main Results:

  • Identified 61 species with potential for multiple chemotaxis pathways.
  • Observed conserved gene blocks (cheA-cheW, cheR-cheB) suggesting co-transcription.
  • Found CheY genes are often dispersed, unlike other core chemotaxis genes.
  • Identified PpfA in operons of many species, indicating common cytoplasmic protein partitioning.
  • Characterized CheY6 as a potentially common variant with a disordered C-terminal region.

Conclusions:

  • Bacterial species frequently possess multiple chemotaxis pathways.
  • Operon organization is key to maintaining distinct signaling pathways.
  • Conserved gene blocks highlight functional linkage.
  • CheY's unique genomic location and interactions require consideration in pathway modeling.