Journal
INFECTION AND IMMUNITY
Volume 73, Issue 6, Pages 3758-3763Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/IAI.73.6.3758-3763.2005
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- NIDCR NIH HHS [R01 DE013657, DE 13657-02] Funding Source: Medline
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The Actinobacillus actinomycetemcomitans afeABCD iron transport system, the expression of which is controlled by iron and Fur, was identified in three different isolates. The protein products of this locus are related to bacterial ABC transporters involved in metal transport. Transformation of the Escherichia coli 1017 iron acquisition mutant with a plasmid harboring afeABCD promoted cell growth under iron-chelated conditions. However, insertion disruption of each of the afeABCD coding regions abolished this growth-relieving effect. The replacement of the parental afeA allele with the derivative afeA::EZ::TN < KAN-2 > drastically reduced the ability of A. actinomycetemcomitans cells to grow under iron-chelated conditions.
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