Cloning and characterization of an iron-uptake ATP-binding cassette (ABC) transporter of Bartonella henselae

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Publication Type thesis
School or College School of Medicine
Department Pathology
Author Arrington, Blythe
Title Cloning and characterization of an iron-uptake ATP-binding cassette (ABC) transporter of Bartonella henselae
Date 2001-08
Description Bartonella henselae is a fastidious gram-negative, slow-growing organism that is a main causative agent of cat scratch disease. Cat scratch disease is characterized by the presence of subacute regional lymphadenopathy following a cat scratch or bite. The objective of this study was to clone and characterize the heme receptor of B. henselae. However, the cloning and characterization of an iron-uptake ATP-binding cassette transporter, or ABC transporter, are reported. ABC transporters are responsible for transporting a variety of solutes across the cell membrane. This ABC transporter is possibly for ferrichrome, ferric dicitrate, ferric enterobactin, or hemin, and is probably part of an operon involved in uptake of one of these iron sources. Iron acquisition is important for many microorganisms, and is often a virulence factor in pathogenesis. Southern hybridization with Vibrio vulnificus heme receptor DNA, hupA, with the cosmid containing B. henselae DNA fragments resulted in nonspecific binding. Oligonucleotides were then constructed from highly conserved regions of bacterial species' heme receptor protein sequences. The DNA sequencing analysis of the clones homologous to the oligonucleotide hybridization revealed the VirB operon of B. henselae. However, a 753-bp open reading frame upstream from the VirB operon revealed homology to an iron-uptake ABC transporter. The iron-uptake ABC transporter of B. henselae has 46.8% identity and 73.4% homology with Bacillus halodurans ferrichrome ABC transporter. The protein is 251 amino acids in length with a predicted molecular weight of 29.266.77 g/mol and an isoelectric point (pI) of 9.30. The DNA sequence and protein analyses are reported in this document. Further sequencing upstream from the ABC transporter may reveal the heme receptor and other iron-uptake genes.
Type Text
Publisher University of Utah
Subject Pathogenicity; Metabolism
Subject MESH Bartonella; Bartonella Infections; Iron
Dissertation Institution University of Utah
Dissertation Name MS
Language eng
Relation is Version of Digital reproduction of "Cloning and characterization of an iron-uptake ATP-binding cassette (ABC) transporter of Bartonella henselae". Spencer S. Eccles Health Sciences Library.
Rights Management © Blythe Arrington.
Format Medium application/pdf
Format Extent 1,063,113 bytes
Identifier undthes,4138
Source Original: University of Utah Spencer S. Eccles Health Sciences Library (no longer available)
Funding/Fellowship Public Health Service grant AI40067 from the National Institute of Allergy and Infectious Disease to C.M.L.
Master File Extent 1,063,153 bytes
ARK ark:/87278/s61c1zq0
Setname ir_etd
Date Created 2012-04-24
Date Modified 2012-04-24
ID 191551
Reference URL