Abstract
The Corynebacterium diphtheriae irp1 gene is negatively regulated by DtxR and iron. The nucleotide sequence of irp1 revealed that it has homology with genes involved in iron acquisition. Expression of the irp1 gene showed that it encodes a lipoprotein (IRP1) with a predicted size of 38 kDa. Northern blot experiments indicated that transcription from the irp1 promoter is repressed in high-iron medium and suggested that irp1 is part of an iron-regulated operon.
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Amino Acid Sequence
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Bacterial Proteins / metabolism*
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Base Sequence
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Cloning, Molecular
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Corynebacterium diphtheriae / genetics
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Corynebacterium diphtheriae / metabolism*
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DNA-Binding Proteins / metabolism*
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Gene Expression Regulation, Bacterial*
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Genes, Bacterial*
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Iron / metabolism*
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Iron Regulatory Protein 1
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Iron-Regulatory Proteins
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Iron-Sulfur Proteins / genetics*
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Iron-Sulfur Proteins / metabolism
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Lipoproteins / genetics*
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Lipoproteins / metabolism
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Molecular Sequence Data
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RNA-Binding Proteins / genetics*
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RNA-Binding Proteins / metabolism
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Sequence Analysis
Substances
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Bacterial Proteins
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DNA-Binding Proteins
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DtxR protein, Corynebacterium diphtheriae
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Iron-Regulatory Proteins
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Iron-Sulfur Proteins
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Lipoproteins
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RNA-Binding Proteins
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Iron
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Iron Regulatory Protein 1