Inter-Research > DAO > v58 > n2-3 > p151-156  
Diseases of Aquatic Organisms

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DAO 58:151-156 (2004)  -  doi:10.3354/dao058151

Identification and characterisation of the fur genes in Photobacterium damselae ssp. piscicida and ssp. damselae

Sandra Juíz-Río, Carlos R. Osorio, Manuel L. Lemos*

Departamento de Microbiología y Parasitología, Instituto de Acuicultura, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
*Corresponding author. Email:

ABSTRACT: The gene encoding the ferric uptake regulator protein (fur gene) of the fish pathogenic bacterium Photobacterium damselae ssp. piscicida Strain DI21 was partially amplified using degenerate oligonucleotides. Complete sequencing of the fur gene and neighbouring DNA was accomplished by primer walking. An open reading frame of 447 bp, coding for a protein of 148 amino acids, and with high homology to previously described Fur proteins, was identified. The fur gene of P. damselae ssp. damselae ATCC 35083 was subsequently amplified by PCR with specific primers and its sequence determined, showing a 99.3% similarity to the P. damselae ssp. piscicida fur gene. The P. damselae fur gene was able to complement the fur mutation of Escherichia coli Strain H1681 in an iron-dependent fashion.

KEY WORDS: Photobacterium damselae · Pasteurellosis · fur gene · Fur protein · Iron uptake

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