FurC Regulates Expression of zupT for the Central Zinc Importer ZupT of Cupriavidus metallidurans
FurC Regulates Expression of zupT for the Central Zinc Importer ZupT of Cupriavidus metallidurans
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FurC 调节 Curiavidus Metallidurans 中央锌输入蛋白 ZupT 的表达
DOI:
10.1128/jb.01713-14
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发表时间:
2014
影响因子:
3.2
通讯作者:
Nies DH
中科院分区:
文献类型:
--
作者:
Schmidt C;Schwarzenberger C;Grosse C;Nies DH
The zinc importer ZupT is required for the efficient allocation of zinc to zinc-dependent proteins in the metal-resistant bacterium Cupriavidus metallidurans but not for zinc importper se. The expression ofzupTis upregulated under conditions of zinc starvation. C. metallidurans contains three members of the Fur family of regulators that qualify as candidates for thezupTregulator. The expression of azupT-lacZreporter gene fusion was strongly upregulated in a ΔfurCmutant but not in a ΔfurAor ΔfurBmutant. Expression of the genes for transition-metal importers (pitA,corA1,corA2, andcorA3) was not changed in this pattern in all three Δfurmutants, but they were still downregulated under conditions of elevated zinc concentrations, indicating the presence of another zinc-dependent regulator. FurA was a central regulator of the iron metabolism in C. metallidurans, andfurAwas constitutively expressed under the conditions tested. Expression offurBwas upregulated under conditions of iron starvation, and FurB could be an iron starvation Fur connecting general metal and iron homeostasis, as indicated by the phenotype of a ΔfurBΔfurCdouble mutant. FurC was purified as a Strep-tagged protein and retarded the electrophoretic mobility of a DNA fragment upstream ofzupT. Binding of FurC to this operator region was influenced by the presence of zinc ions and EDTA. Thus, FurC is the main zinc uptake regulator (Zur) of C. metallidurans and represses synthesis of the central zinc importer ZupT when sufficient zinc is present.
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DOI:
10.1515/znc-1999-1103
发表时间:
1999
期刊:
Zeitschrift für Naturforschung C
影响因子:
--
作者:
Maik Münzinger;K. Taraz;H. Budzikiewicz
通讯作者:
H. Budzikiewicz
影响因子:
3.2
作者:
D. Nies
通讯作者:
D. Nies
影响因子:
3.4
作者:
Herzberg, M.;Bauer, L.;Nies, D. H.
通讯作者:
Nies, D. H.
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
J. Helmann;Sumarin Soonsanga;Scott E. Gabriel
通讯作者:
Scott E. Gabriel
影响因子:
2.7
作者:
Marx, CJ;Lidstrom, ME
通讯作者:
Lidstrom, ME