Dictionary > Spot desmosome

Spot desmosome

Definition
noun, plural: spot desmosomes
A type of desmosome characterized by a circular or spot-like rivet between neighboring cells
Supplement
Desmosomes are anchoring junctions between neighboring cells. A similar anchoring junction is the hemidesmosome. Both desmosomes and hemidesmosomes use intermediate filaments as their cytoskeletal anchor. However, the transmembrane linker of desmosomes is cadherin whereas that of hemidesmosomes is integrins. Furthermore, desmosomes link cell to another cell whereas hemidesmosomes link cell to the extracellular matrix.
Desmosomes are typically found in simple and stratified squamous epithelium. They aid in resisting shearing forces. They are also found between myocytes where they bind these cells to one another. There are basically two types of desmosomes identified: (1) spot desmosomes and (2) belt desmosomes. Their difference lies on their appearance. The belt desmosomes are belt-like surrounding the cell completely, hence, the name. Spot desmosomes, on the contrary, are spot-like or circular in appearance. Spot desmosomes are also called macula adherens (i.e. macula means spot). Spot desmosomes together with belt desmosomes and tight junctions form the so-called junctional complex.1
Synonym:

  • macula adherens

Compare:

  • Belt desmosome
  • See also:

    Reference(s):

    1 Quick review: the 5 main intercellular junctions. Retrieved from ://www.pathologystudent.com/?p=9739.


    You will also like...

    Human gastrointestinal tract
    Human Biology – Food and Digestion

    This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

    Physiological Homeostasis
    Physiological Homeostasis

    Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..

    Carbohydrates, fats and proteins - dietary sources
    A Balanced Diet – Carbohydrates and Fat

    Apart from vitamins, the human body also requires high energy sources such as carbohydrates and fats. If you want an ove..

    temperature - abiotic factor
    Abiotic and Biotic Factors

    This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

    Adaptation Tutorial
    Adaptation Tutorial

    Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..

    Muscle
    Muscle

    Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..