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Clostridioides difficile infection [5] (CDI or C-diff), also known as Clostridium difficile infection, is a symptomatic infection due to the spore-forming bacterium Clostridioides difficile. [6] Symptoms include watery diarrhea, fever, nausea, and abdominal pain. [1] It makes up about 20% of cases of antibiotic-associated diarrhea. [1]
Clostridioides difficile toxin A (TcdA) is a toxin produced by the bacteria Clostridioides difficile, formerly known as Clostridium difficile. [1] It is similar to Clostridioides difficile Toxin B . The toxins are the main virulence factors produced by the gram positive , anaerobic, [ 2 ] Clostridioides difficile bacteria.
Clostridioides difficile (syn. Clostridium difficile) is a bacterium known for causing serious diarrheal infections, and may also cause colon cancer. [4] [5] It is known also as C. difficile, or C. diff (/ s iː d ɪ f /), and is a Gram-positive species of spore-forming bacteria. [6]
Bezlotoxumab is a human monoclonal antibody designed for the prevention of recurrence of Clostridium difficile infections. By x-ray crystallized structure of N-terminal of TcdB, the toxin is identified to consist of three domains: a glucosyltransferase domain (GTD), a cysteine protease and a combined repetitive oligopeptide (CROP) domain.
Proteolytically processed clostridial cytotoxins A (306 kDa; TC# 1.C.57.1.2) and B (269 kDa; TC# 1.C.57.1.1) are O-glycosyltransferases that modify small GTPases of the Rho family by glucosylation of threonine residues, thereby blocking the action of the GTPases as switches of signal processes such as those mediated by the actin cytoskeleton.
Toxigenic strains of C. difficile produce two large toxins (TcdA and TcdB) encoded within a pathogenicity locus. tcdE, encoded between tcdA and tcdB, encodes a 166 amino acyl (aa) protein which causes death to E. coli when expressed, and the structure of TcdE resembles holins .
The human NAA10 is located on chromosome Xq28 and contains 8 exons, 2 encoding three different isoforms derived from alternate splicing. [8] Additionally, a processed NAA10 gene duplication NAA11 (ARD2) has been identified that is expressed in several human cell lines; [9] however, later studies indicate that Naa11 is not expressed in the human cell lines HeLa and HEK293 or in cancerous ...
Clostridium botulinum can produce botulinum toxin in food or wounds and can cause botulism. This same toxin is known as Botox and is used in cosmetic surgery to paralyze facial muscles to reduce the signs of aging; it also has numerous other therapeutic uses.
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