Transcript profiling reveals new insights into the acclimation of the mesophilic fresh-water cyanobacterium Synechococcus elongatus PCC 7942 to iron starvation.

Plant Physiology
Anke NodopKlaus-Peter Michel

Abstract

The regulatory network for acclimation of the obligate photoautotrophic fresh water cyanobacterium Synechococcus elongatus PCC 7942 to iron (Fe) limitation was studied by transcript profiling with an oligonucleotide whole genome DNA microarray. Six regions on the chromosome with several Fe-regulated genes each were identified. The irpAB and fut region encode putative Fe uptake systems, the suf region participates in [Fe-sulfur] cluster assembly under oxidative stress and Fe limitation, the isiAB region encodes CP43' and flavodoxin, the idiCB region encodes the NuoE-like electron transport associated protein IdiC and the transcriptional activator IdiB, and the ackA/pgam region encodes an acetate kinase and a phosphoglycerate mutase. We also investigated the response of two S. elongatus PCC 7942 mutants to Fe starvation. These were mutant K10, lacking IdiB but containing IdiC, and mutant MuD, representing a idiC-merodiploid mutant with a strongly reduced amount of IdiC as well as IdiB. The absence of IdiB in mutant K10 or the strongly reduced amount of IdiB in mutant MuD allowed for the identification of additional members of the Fe-responsive IdiB regulon. Besides idiA and the irpAB operon somB(1), somA(2), ftr1, ackA, pgam, and...Continue Reading

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Citations

Oct 15, 2010·Acta Crystallographica. Section F, Structural Biology and Crystallization Communications·Gye Won HanIan A Wilson
Jun 3, 2009·Microbiology and Molecular Biology Reviews : MMBR·D J ScanlanF Partensky
Jan 22, 2011·Environmental Microbiology·Ralitza AlexovaBrett A Neilan
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Jun 5, 2015·Journal of Molecular Evolution·Gilberto Álvarez-CanalesLuis Delaye
Jul 2, 2014·Frontiers in Microbiology·Karolin Zerulla, Jörg Soppa
Nov 19, 2011·FEMS Microbiology Letters·Marco GrieseJörg Soppa
Jul 11, 2014·PloS One·Dan Cheng, Qingfang He
May 30, 2014·Metallomics : Integrated Biometal Science·James Paul BarnettClaudia Andrea Blindauer
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Aug 15, 2020·Frontiers in Microbiology·Ulysse GuyetLaurence Garczarek
Sep 9, 2020·Bioelectrochemistry·Rita Vieira LemosStefano Freguia

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