title: Yersiniabactin and other siderophores produced by clinical isolates of Enterobacter spp. and Citrobacter spp.
abstract: We analyzed the ability of extraintestinal strains of Enterobacter spp. and Citrobacter spp. to employ different siderophore-mediated strategies of iron acquisition. All strains produced iron-chelating compounds. Cross-feeding assays indicated that most isolates of both Enterobacter spp. and Citrobacter spp. excreted catecholate siderophore enterobactin, less produced aerobactin, and single strains excreted hydroxamates different from aerobactin. Besides, we analyzed if the strains had the ability to produce the siderophore yersiniabactin coded by the Yersinia high-pathogenicity island (HPI). The presence of HPI genes was observed in single isolates of three species: E. cloaceae, E. aerogenes and C. koseri. A detailed polymerase chain reaction analysis revealed differences in the genetic organization of the HPIs; however, in a cross-feeding test we proved that yersiniabactin was produced and the island was functional.
authors.affiliation: Department of Microbiology, Institute of Experimental Biology, Adam Mickiewicz University, ul. Fredry 10, 61-701 Poznań, Poland. amok@amu.edu.pl
authors.forename: Joanna
authors.initials: J
authors.lastname: Mokracka
authors.forename: Ryszard
authors.initials: R
authors.lastname: Koczura
authors.forename: Adam
authors.initials: A
authors.lastname: Kaznowski
mesh_terms: D001426:Bacterial Proteins; D002614:Chelating Agents / Q000737:chemistry / Q000378:metabolism; D002954:Citrobacter / Q000145:classification / Q000378:metabolism* / Q000472:pathogenicity / Q000502:physiology; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004754:Enterobacter / Q000235:genetics / Q000378:metabolism* / Q000472:pathogenicity; D004756:Enterobacteriaceae Infections / Q000382:microbiology; D044404:Genomic Islands; D006801:Humans; D006877:Hydroxamic Acids; D007501:Iron / Q000378:metabolism*; D010636:Phenols; D016133:Polymerase Chain Reaction; D017262:Siderophores / Q000096:biosynthesis* / Q000235:genetics / Q000378:metabolism; D013844:Thiazoles; D014774:Virulence / Q000235:genetics; D015007:Yersinia / Q000235:genetics / Q000378:metabolism / Q000472:pathogenicity
chemical_list: D001426:Bacterial Proteins; D002614:Chelating Agents; D004269:DNA, Bacterial; D006877:Hydroxamic Acids; D010636:Phenols; D017262:Siderophores; D013844:Thiazoles; C104398:yersiniabactin; C031819:aerobactin; D007501:Iron