Difference between revisions of "Part:BBa K549001"
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Transformed and induced ''E. coli'' cells, cultivated in LB-media (containing Ni(II)). Left-hand side: GFP-excitation; right-hand side: bright-field | Transformed and induced ''E. coli'' cells, cultivated in LB-media (containing Ni(II)). Left-hand side: GFP-excitation; right-hand side: bright-field | ||
Revision as of 16:05, 30 September 2011
Ni(II) dependent rcnA-promoter and GFP
E. coli has an RcnR-regulator that represses the rcnA-promoter in the absence of Ni(II). After addition of Ni (II) (NiCl2), RcnR binds this ion and is released from the promoter. Therefore, GFP will be expressed.
E. coli has to be used as reporter organism since RcnR is not coded on the plasmid.
In presence of nickel the Luciferase is expressed.
Usage and Biology
This BioBrick can be used to detect Ni(II)-Ions in water.
This is how it works:
The sensor is also sensing Co 2+, but not very sensitivly.
Experience: works
Transformed and induced E. coli cells, cultivated in LB-media (containing Ni(II)). Left-hand side: GFP-excitation; right-hand side: bright-field
Sources:
- [http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2958.2006.05369.x/pdf Nickel homeostasis in Escherichia coli – the rcnR-rcnA efflux pathway and its linkage to NikR function] Iwig JS, Rowe JL, Chivers PT
- [http://www.ncbi.nlm.nih.gov/pubmed?term=coordinating%20intracellular%20chivers Coordinating intracellular nickel-metal-site structure-function relationships and the NikR and RcnR repressors] Iwig JS, Chivers PT
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000INCOMPATIBLE WITH RFC[1000]Illegal BsaI.rc site found at 863