Dictionary > Lysozyme


noun, plural: lysozymes
A glycosidase that assists in the hydrolysis of glycosidic bond between N-acetyl muramic acid and N-acetyl glucosamine, such as that in bacterial cell wall
Lysozymes are glycosidases that assist in the hydrolysis of glycosidic bonds between N-acetyl muramic acid and N-acetyl glucosamine. These enzymes are therefore destructive to many bacteria since they can damage bacterial cell wall that is made up of peptidoglycan. Peptidoglycan is a polysaccharide consisting of alternating polymers of N-acetylmuramic acid and N-acetylglucosamine linked by glycosidic bonds. Cell walls provide structural integrity to the bacterial cell and render protection especially from turgor pressure caused by high concentration of proteins and molecules inside the cell relative to the external environment. Without their functional cell wall, bacteria lose their cell shape and rigidity. Lysozymes found in egg albumin, saliva, mucus, lysosomes of phagocytic cells, and so on have antiseptic capability as they destroy the cell walls of certain bacteria (especially gram-positive bacteria). They also occur in human tears where they serve as the main defense against many eye infections, such as conjunctivitis.

  • muramidase
  • N-acetylmuramide glycanhydrolase

See also:

  • Bacteriophage
  • Nasal mucosa
  • Specific granule
  • Cell disruption
  • glycosidase
  • lysosome
  • gram-positive bacteria

    You will also like...

    Adaptation Tutorial
    Adaptation Tutorial

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

    Thermographic image of face and neck
    Regulation of Organic Metabolism, Growth and Energy Balance

    The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..

    Adaptive Radiation
    Adaptive Radiation

    The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..

    Plant biology
    Plant Biology

    Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..

    Human perception in action
    Human Perception – Neurology

    This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

    Kidneys and Regulation of Water and Inorganic Ions

    The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..