Abstract
The Saccharopolyspora erythraea gene ( fdxA) corresponding to a previously purified ferredoxin [Shafiee and Hutchinson, J. Bacteriol., 170 (1988) 1548–1553] was cloned using an oligodeoxyribonucleotide probe based on the N-terminal sequence of the ferredoxin. The nucleotide sequence of a 1.3-kb segment encompassing fdxA indicates that the corresponding protein, SeFdI, is 105 amino acids long, and very similar to other 7Fe ferredoxins. A partial open reading frame closely linked to fdxA was also detected. Disruption of fdxA was attempted by replacing the wild-type allele with an in vitro mutated copy. The failure to construct an fdxA mutant strain suggests that fdxA lies in an essential region of the S. erythraea chromosome.
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