Search results
Results from the WOW.Com Content Network
Diphtheria toxin is a single polypeptide chain of 535 amino acids consisting of two subunits linked by disulfide bridges, known as an A-B toxin.Binding to the cell surface of the B subunit (the less stable of the two subunits) allows the A subunit (the more stable part of the protein) to penetrate the host cell.
The diphtheria toxin precursor is a protein of molecular weight 60 kDa. Certain proteases, such as trypsin, selectively cleave DT to generate two peptide chains, amino-terminal fragment A (DT-A) and carboxyl-terminal fragment B (DT-B), which are held together by a disulfide bond . [ 23 ]
The diphtheria toxin gene is encoded by the bacteriophage found in toxigenic strains, integrated into the bacterial chromosome. [13] The diphtheria toxin repressor is mainly controlled by iron. It serves as the essential cofactor for the activation of target DNA binding. A low concentration of iron is required in the medium for toxin production.
CRM197 [1] is a non-toxic mutant of diphtheria toxin, currently used as a carrier protein for polysaccharides and haptens to make them immunogenic. [2] There is some dispute about the toxicity of CRM197, with evidence that it is toxic to yeast cells and some mammalian cell lines.
Bahasa Indonesia; Magyar; ... Pages in category "Diphtheria" The following 31 pages are in this category, out of 31 total. ... Diphtheria toxin; V. Diphtheria vaccine
Help; Learn to edit; Community portal; Recent changes; Upload file; Special pages
A vintage 1895 vial of diphtheria antitoxin. An antitoxin is an antibody with the ability to neutralize a specific toxin. Antitoxins are produced by certain animals, plants, and bacteria in response to toxin exposure. Although they are most effective in neutralizing toxins, they can also kill bacteria and other microorganisms.
A corynebacteriophage (or just corynephage) is a DNA-containing bacteriophage specific for bacteria of genus Corynebacterium as its host. [1] Corynebacterium diphtheriae virus [2] strain Corynebacterium diphtheriae phage [2] (aka Corynephage β [3] or just β-phage [4] [5]) introduces toxigenicity into strains of Corynebacterium diphtheriae as it encodes diphtheria toxin, [6] [7] [8] [5] [4 ...