Abstract:
:We have investigated the iron-dependent regulation of the psbA gene, encoding the enzyme L-ornithine N(5)-oxygenase in the rhizobacterium Pseudomonas B10. We have cloned and characterized a Pseudomonas B10 gene, designated psbS, required for psbA expression. PsbS is endowed with structural and functional features of extracytoplasmatic function (ECF) sigma factors, and is closely related to the iron starvation sigmas PvdS, PbrA, and PfrI, which mediate the iron-repressible expression of pseudobactin biosynthesis genes in different Pseudomonas species. Expression of psbA was found to be indirectly controlled by Fur, which abrogates psbS transcription in the presence of sufficient iron.
journal_name
FEMS Microbiol Lettjournal_title
FEMS microbiology lettersauthors
Leoni L,Ambrosi C,Petrucca A,Visca Pdoi
10.1111/j.1574-6968.2002.tb11085.xkeywords:
subject
Has Abstractpub_date
2002-03-05 00:00:00pages
219-25issue
2eissn
0378-1097issn
1574-6968pii
S0378109702004512journal_volume
208pub_type
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