Related Experiment Video

Updated: Aug 15, 2026

Immuno-fluorescence Assay of Leptospiral Surface-exposed Proteins
10:47

Immuno-fluorescence Assay of Leptospiral Surface-exposed Proteins

Published on: July 1, 2011

Characterization of outer membrane proteins in Chlamydia trachomatis LGV serovar L2

R J Tanzer1, T P Hatch

  • 1Department of Molecular Sciences, University of Tennessee Center for Health Sciences, Memphis, Tennessee 38163, USA.

Journal of Bacteriology
|March 29, 2001
PubMed

Insights

Researchers identified key outer membrane proteins in Chlamydia trachomatis using a novel labeling method. This study enhances understanding of Chlamydia

Area of Science:

  • Microbiology
  • Cell Biology
  • Biochemistry

Background:

  • Chlamydia trachomatis is a significant human pathogen.
  • The outer membrane proteins (OMPs) of Chlamydia are crucial for its survival and pathogenesis.
  • Understanding the composition of the elementary body outer membrane is vital for developing targeted therapies.

Purpose of the Study:

  • To identify proteins located in the outer membrane of Chlamydia trachomatis LGV serovar L2 elementary bodies.
  • To utilize a photoactivatable lipophilic reagent for protein labeling in situ.
  • To characterize the protein components of the Chlamydia trachomatis outer membrane.

Main Methods:

  • Employing a photoactivatable, lipophilic reagent, 3'-(trifluoromethyl)-3-(m-[125I]iodophenyl)diazirine, for targeted protein labeling.
  • Utilizing mass spectrometry to identify proteins labeled within the Chlamydia trachomatis outer membrane.
  • Analyzing protein expression patterns in relation to the Chlamydia developmental cycle.

Main Results:

  • Successfully labeled and identified several key outer membrane proteins.
  • Identified polymorphic outer membrane proteins E, G, and H, which are expressed late in the developmental cycle.
  • Identified the major outer membrane protein and a mixture of 46-kDa proteins, including open reading frame 623 protein.

Conclusions:

  • The study successfully identified critical outer membrane proteins of Chlamydia trachomatis.
  • The findings provide insights into the protein composition of the Chlamydia elementary body outer membrane.
  • This research contributes to a better understanding of Chlamydia pathogenesis and potential therapeutic targets.

More Related Videos

Separation of the Cell Envelope for Gram-negative Bacteria into Inner and Outer Membrane Fractions with Technical Adjustments for Acinetobacter baumannii10:24

Separation of the Cell Envelope for Gram-negative Bacteria into Inner and Outer Membrane Fractions with Technical Adjustments for Acinetobacter baumannii

Published on: April 10, 2020

Cell-Free Scaled Production and Adjuvant Addition to a Recombinant Major Outer Membrane Protein from Chlamydia muridarum for Vaccine Development12:53

Cell-Free Scaled Production and Adjuvant Addition to a Recombinant Major Outer Membrane Protein from Chlamydia muridarum for Vaccine Development

Published on: March 16, 2022

Related Concept Videos

Outer Layers of the Cell Envelope01:18

Outer Layers of the Cell Envelope

The outermost layers of prokaryotic cells play a critical role in their survival, virulence, and interaction with the environment. These layers, often composed of polysaccharides, polypeptides, or proteins, form protective and adhesive structures that vary in organization and function.Capsules and Slime LayersCapsules are highly organized, tightly bound layers that firmly attach to the bacterial cell wall. Capsules are usually made of polysaccharides, though some are made of polypeptides. These...
Formation of Lipopolysaccharides01:19

Formation of Lipopolysaccharides

Lipopolysaccharides (LPS) are crucial components of the outer membrane of Gram-negative bacteria, serving both structural and functional roles. It contributes to membrane stability and protects bacteria from host immune responses. LPS is composed of three major regions—lipid A, a core oligosaccharide, and an O antigen. The biosynthesis and assembly of LPS involve a highly coordinated set of enzymatic reactions and transport mechanisms. Additionally, LPS is recognized as an endotoxin, triggering...
Gram-negative Bacterial Protein Secretion Systems01:17

Gram-negative Bacterial Protein Secretion Systems

Gram-negative bacteria utilize sophisticated protein secretion systems to transport proteins across their double-membrane envelope into the extracellular environment or host cells. Based on their mechanism of action, these systems are classified into one-step and two-step pathways.One-Step Secretion Systems (Types I, III, IV, and VI)One-step secretion systems bypass the periplasm entirely, forming a continuous channel that spans both the inner and outer membranes:Type I Secretion System (T1SS):...
Bacterial Phylum Chlamydiae01:29

Bacterial Phylum Chlamydiae

The phylum Chlamydiae or Chlamydiota is composed of a single order, Chlamydiales. This phylum consists entirely of obligate intracellular parasites that infect eukaryotic hosts. While human pathogens within this group have been studied extensively, the phylum encompasses many species capable of interacting with various eukaryotic organisms. Members of Chlamydiae are typically small cocci, approximately 0.5 μm in diameter, and exhibit a distinctive developmental cycle. As is characteristic of...
Archaeal Cell Wall01:29

Archaeal Cell Wall

Archaeal cell walls are structurally and compositionally distinct from their bacterial counterparts, lacking the characteristic peptidoglycan layer found in most bacteria. Instead, archaeal cell walls exhibit remarkable diversity, utilizing materials such as pseudomurein, polysaccharides, and proteins to construct their protective outer layers. This structural flexibility is closely tied to archaea's ecological adaptability.S-Layers: The Common Archaeal Cell WallThe S-layer is the most...
Regulation of Bacterial Virulence01:28

Regulation of Bacterial Virulence

Pathogenic bacteria employ a range of regulatory mechanisms to modulate the expression of virulence genes in response to environmental and host-derived signals. These mechanisms ensure that virulence factors are expressed only under favorable conditions, thereby optimizing infection and survival strategies.Mechanisms of Virulence RegulationKey regulatory strategies include:Two-Component Systems: These consist of a membrane-bound sensor kinase and a cytoplasmic response regulator. Environmental...