Statements in which the resource exists.
SubjectPredicateObjectContext
pubmed-article:11448229rdf:typepubmed:Citationlld:pubmed
pubmed-article:11448229lifeskim:mentionsumls-concept:C0205145lld:lifeskim
pubmed-article:11448229lifeskim:mentionsumls-concept:C0142281lld:lifeskim
pubmed-article:11448229lifeskim:mentionsumls-concept:C0450442lld:lifeskim
pubmed-article:11448229lifeskim:mentionsumls-concept:C0237881lld:lifeskim
pubmed-article:11448229lifeskim:mentionsumls-concept:C0750502lld:lifeskim
pubmed-article:11448229lifeskim:mentionsumls-concept:C0332514lld:lifeskim
pubmed-article:11448229pubmed:issue15lld:pubmed
pubmed-article:11448229pubmed:dateCreated2001-7-12lld:pubmed
pubmed-article:11448229pubmed:abstractTextThe syntheses of the microbial iron chelators L-fluviabactin, its unnatural enantiomer, D-fluviabactin, L-homofluviabactin, and L-agrobactin, are described. The key steps involve the selective bis-acylation of the terminal nitrogens of norspermidine, spermidine, or homospermidine with 2,3-bis(benzyloxy)benzoic acid in the presence of 1,1-carbonyldiimidazole, followed by coupling of the N-hydroxysuccinimide ester of CBZ-protected L- or D-threonine with the central nitrogen. The effectiveness of each of these ligands in supporting the growth of Paracoccus denitrificans in a low-iron environment and the ability of these compounds to promote iron uptake are evaluated. The stereochemical configuration of the oxazoline ring is shown to be the major structural factor controlling both microbial growth stimulation and iron uptake. L-Fluviabactin, L-homofluviabactin, and L-agrobactin all promoted growth and iron uptake; D-fluviabactin was only marginally active. As with the microorganism's native siderophore, L-parabactin, all three ligands in the L-configuration investigated exhibited biphasic, i.e., both high-affinity and low-affinity, kinetics. The high-affinity system (iron concentration < 1 microM) yielded K(m) values between 0.11 and 0.23 microM and V(max) values from 157 to 129 pg-atoms Fe min(-1) (mg of protein)(-1), whereas the low-affinity scheme (iron concentration > 1 microM) gave K(m) values from 0.53 to 3.5 microM and V(max) values between 96 and 413 pg-atoms Fe min(-1) (mg of protein)(-1). Both L- and D-fluviabactin are very effective at clearing iron from the bile duct-cannulated rodent; when given subcutaneously at a dose of 150 micromol/kg, both ligands had iron clearing efficiencies of >13%, which is much greater than that of desferrioxamine in this model. Thus, by altering the stereochemistry of certain microbial siderophores, it is possible to generate deferration agents that are still effective at clearing iron from animals, yet do not promote microbial growth.lld:pubmed
pubmed-article:11448229pubmed:languageenglld:pubmed
pubmed-article:11448229pubmed:journalhttp://linkedlifedata.com/r...lld:pubmed
pubmed-article:11448229pubmed:citationSubsetIMlld:pubmed
pubmed-article:11448229pubmed:chemicalhttp://linkedlifedata.com/r...lld:pubmed
pubmed-article:11448229pubmed:chemicalhttp://linkedlifedata.com/r...lld:pubmed
pubmed-article:11448229pubmed:chemicalhttp://linkedlifedata.com/r...lld:pubmed
pubmed-article:11448229pubmed:chemicalhttp://linkedlifedata.com/r...lld:pubmed
pubmed-article:11448229pubmed:chemicalhttp://linkedlifedata.com/r...lld:pubmed
pubmed-article:11448229pubmed:chemicalhttp://linkedlifedata.com/r...lld:pubmed
pubmed-article:11448229pubmed:chemicalhttp://linkedlifedata.com/r...lld:pubmed
pubmed-article:11448229pubmed:statusMEDLINElld:pubmed
pubmed-article:11448229pubmed:monthJullld:pubmed
pubmed-article:11448229pubmed:issn0022-2623lld:pubmed
pubmed-article:11448229pubmed:authorpubmed-author:SmithR ERElld:pubmed
pubmed-article:11448229pubmed:authorpubmed-author:WeimarW RWRlld:pubmed
pubmed-article:11448229pubmed:authorpubmed-author:WeiL FLFlld:pubmed
pubmed-article:11448229pubmed:authorpubmed-author:BergeronR JRJlld:pubmed
pubmed-article:11448229pubmed:authorpubmed-author:WiegandJJlld:pubmed
pubmed-article:11448229pubmed:issnTypePrintlld:pubmed
pubmed-article:11448229pubmed:day19lld:pubmed
pubmed-article:11448229pubmed:volume44lld:pubmed
pubmed-article:11448229pubmed:ownerNLMlld:pubmed
pubmed-article:11448229pubmed:authorsCompleteYlld:pubmed
pubmed-article:11448229pubmed:pagination2469-78lld:pubmed
pubmed-article:11448229pubmed:dateRevised2003-11-14lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:meshHeadingpubmed-meshheading:11448229...lld:pubmed
pubmed-article:11448229pubmed:year2001lld:pubmed
pubmed-article:11448229pubmed:articleTitleSignificance of asymmetric sites in choosing siderophores as deferration agents.lld:pubmed
pubmed-article:11448229pubmed:affiliationDepartment of Medicinal Chemistry, University of Florida, J. Hillis Miller Health Science Center, Gainesville, Florida 32610, USA. bergeron@mc.cop.ufl.edulld:pubmed
pubmed-article:11448229pubmed:publicationTypeJournal Articlelld:pubmed
http://linkedlifedata.com/r...http://linkedlifedata.com/r...pubmed-article:11448229lld:chembl
http://linkedlifedata.com/r...pubmed:referesTopubmed-article:11448229lld:pubmed