What does lysin mean?
Lysin is a technical noun for an enzyme that breaks open bacterial cells by digesting the peptidoglycan layer in their cell walls. Such enzymes are of particular interest in microbiology and antimicrobial research. A bacteriophage may produce a lysin to break out of the bacterial host in which it has multiplied, and purified lysins are also being investigated as possible treatments for bacterial infections, including infections involving antibiotic-resistant organisms. The word is specialized rather than everyday, and its precise use can depend on context: it may denote a particular enzyme or the broader class of enzymes with this destructive action. Although lysin and lysine look and sound similar, they name entirely different things. Lysin is an enzyme associated with cell-wall breakdown, while lysine is an amino acid involved in the structure and function of proteins.
nounA lysin is a biochemical or antimicrobial enzyme that breaks down the peptidoglycan layer of bacterial cell walls, causing the cells to rupture or lyse. The term is especially used for enzymes produced by bacteriophages as a means of breaking open their bacterial hosts.
- An enzyme that breaks down bacterial cell walls and causes bacterial lysis, including enzymes used by bacteriophages to escape from their hosts.
"The bacteriophage-derived lysin was effective against antibiotic-resistant bacteria in the laboratory."
"Researchers engineered the lysin to target a specific species of antibiotic-resistant bacteria."
"The enzyme entered the bacterial cell and disrupted the peptidoglycan wall until the cell lysed."
The plural is used when referring to several distinct lysins, different lysin enzymes, or multiple types of lysin.
"The scientists compared several lysins for their ability to kill antibiotic-resistant bacteria."
A microscopic demolition expert: a lysin chews through a bacterium’s protective wall and lets the cell burst open.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does lysin come from?
Lysin was formed in English from the Greek-derived word lysis and the biochemical suffix -in. Greek lysis means a loosening or dissolving, referring to the destruction of a cell when its wall or membrane fails. The same root also underlies words such as lysosome, lysate, and lytic, all of which describe dissolving, cellular breakdown, or substances produced by such breakdown.
How lysin is actually used
Lysin is primarily a technical term used in microbiology, biochemistry, and antimicrobial research. In discussions of bacteriophages, it commonly refers to a phage enzyme that destroys the host bacterium's cell wall from within.
Easily confused with lysin
Lysin is an enzyme that breaks down bacterial cell walls, whereas lysine is an amino acid that is essential to human protein synthesis.