title: Determination of the amino acid change responsible for the nontoxic, cross-reactive exotoxin A protein (CRM 66) of Pseudomonas aeruginosa PAO-PR1.
abstract: Analysis of purified exotoxin A from parental Pseudomonas aeruginosa PAO1 and mutant strain PAO-PR1, which produces enzymatically inactive exotoxin A (CRM 66), revealed that CRM 66 lost 90% of parental enzymatic activity. Nucleotide sequence analysis of cloned exotoxin A genes showed a single amino acid substitution in CRM 66. Position 426 in the mature protein of parental (PAO1) exotoxin A is histidine, whereas in CRM 66, it is tyrosine.
mesh_terms: D036002:ADP Ribose Transferases; D000596:Amino Acids / Q000032:analysis; D001427:Bacterial Toxins; D005098:Exotoxins / Q000235:genetics* / Q000302:isolation & purification; D005796:Genes; D005798:Genes, Bacterial; D009154:Mutation; D011550:Pseudomonas aeruginosa / Q000235:genetics* / Q000472:pathogenicity; D037521:Virulence Factors; D000097668:Pseudomonas aeruginosa Exotoxin A
chemical_list: D036002:ADP Ribose Transferases; D000596:Amino Acids; D001427:Bacterial Toxins; D005098:Exotoxins; D037521:Virulence Factors; D000097668:Pseudomonas aeruginosa Exotoxin A