Related Experiment Video
Updated: Jul 18, 2026

12:23
Granulocyte-dependent Autoantibody-induced Skin Blistering
Published on: October 12, 2012
Seaweed dermatitis: structure of lyngbyatoxin A
Summary
Lyngbyatoxin A, a potent inflammatory compound, was isolated from the marine cyanobacterium Lyngbya majuscula. This toxin shares structural similarities with teleocidin B, a known Streptomyces metabolite.
Area of Science:
- Marine Natural Products Chemistry
- Toxicology
- Phycology
Background:
- Marine cyanobacteria are prolific sources of bioactive compounds.
- Lyngbya majuscula is known to produce various toxins.
- Understanding the chemical ecology of marine organisms is crucial.
Purpose of the Study:
- To isolate and characterize novel toxins from Lyngbya majuscula.
- To elucidate the chemical structure of Lyngbya majuscula toxin.
- To investigate the relationship between Lyngbya majuscula toxin and other known toxins.
Main Methods:
- Lipid extraction from Lyngbya majuscula.
- Isolation of the active compound using chromatographic techniques.
- Structure elucidation using spectroscopic methods (NMR, MS).
Main Results:
- Isolation and identification of Lyngbyatoxin A.
- Determination of the gross structure of Lyngbyatoxin A.
- Lyngbyatoxin A identified as a highly inflammatory and vesicatory substance.
- Structural similarity noted between Lyngbyatoxin A and teleocidin B.
Conclusions:
- Lyngbya majuscula harbors potent bioactive toxins.
- Lyngbyatoxin A represents a new class of marine-derived inflammatory agents.
- The structural relationship to teleocidin B suggests potential shared biosynthetic pathways or mechanisms of action.
More Related Videos
Related Concept Videos
Structure of Amines
The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’ carbon–carbon bond (154 pm). These aspects are illustrated in Figure...
Type IV Collagen of Basal Lamina
Type IV collagen is a 400 nm long, network-forming collagen that acts as a barrier between the epithelial and endothelial cells. Type IV collagen forms the backbone of the basement membrane by scaffolding with laminin, entactin, proteoglycans, and fibronectin. Apart from rendering structural support to the basement membrane, it also helps entail signaling potentials necessary for both pathological and physiological functions.
A type IV collagen molecule has six alpha chains which can exist in...
A type IV collagen molecule has six alpha chains which can exist in...
Accessory Structures of the Skin: Sebaceous Glands
A sebaceous gland is a type of oil gland found almost all over the skin ( except palms and soles) and helps lubricate and waterproof the skin and hair. Most sebaceous glands are associated with hair follicles. They generate and excrete sebum, a mixture of lipids, onto the skin surface, thereby naturally lubricating the dry and dead layer of keratinized cells of the stratum corneum, keeping it pliable.
These glands that produce the oils on the skin and hair are holocrine glands. The mature...
These glands that produce the oils on the skin and hair are holocrine glands. The mature...
The Skin Microbiota
The human skin serves as a complex ecosystem inhabited by a diverse community of microorganisms, including bacteria, fungi, and viruses. This microbiome plays a critical role in maintaining skin health and defending against pathogenic invaders. The composition of microbial communities varies significantly across different regions of the body, influenced primarily by the local levels of moisture and sebum.Regional Variation in Skin MicrobiotaCutibacterium acnes predominantly colonizes sebaceous...
Staphylococcal Skin Infections
Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
Antifungal Agents
Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to cholesterol contributes to...

