This is a double terminator which contains two <partinfo>B0010</partinfo> terminators. We used this double terminator instead of the commonly used <partinfo>B0015</partinfo> double terminator (which was assembled from the <partinfo>B0010</partinfo> and the <partinfo>B0012</partinfo> terminator) because of problems mentioned in the partsregistry with the <partinfo>B0012</partinfo> terminator.

The strong ribosomal binding site (RBS) AGGAG was always assembled.

This is a gene for the lac repressor lacI with a LVA degradation tag. We used this BioBrick to build a tightly regulated lac-operon <partinfo>K389050</partinfo> with low basal transcription. It seems that this lacI is either degraded too quickly or it does not work properly because it is not possible to repress the lac operon with this part.

This BioBrick was used as a reporter gene, e.g. in the construct <partinfo>K389013</partinfo>. mRFP as a reporter gene has the advantage that it is easy to measure and comparatively stable.

This promoter is a strong constitutive promoter which is natively located upstream of the lacI gene in E. coli lacI^q strains. It was used to build a tightly regulated lac-operon <partinfo>K389050</partinfo> in which it was assembled upstream of the lacI gene from the partsregistry <partinfo>C0012</partinfo>.

We used this BioBrick to amplify our read-out signal luciferase in the part <partinfo>K389401</partinfo>. This BioBrick is supposed to amplify the effect of a PoPS device 15 - 20 fold compared to a system without sensitivity tuner (Cambridge, iGEM 2007, amplifier project).

We used this BioBrick to amplify our read-out signal luciferase in the part <partinfo>K389402</partinfo>. This BioBrick is supposed to amplify the effect of a PoPS device 10 fold compared to a system without sensitivity tuner (Cambridge, iGEM 2007, amplifier project).

We used this BioBrick to amplify our read-out signal luciferase in the part <partinfo>K389403</partinfo>. This BioBrick is supposed to amplify the effect of a PoPS device 30 - 35 fold compared to a system without sensitivity tuner (Cambridge, iGEM 2007, amplifier project).

This BioBrick was used as a visible selection marker for cloning other BioBricks into the <partinfo>pSB1C3</partinfo> plasmid to submit them to the registry. The promoter in this mRFP generator is pretty strong so it is easy to separate colonies which carry this BioBrick from colonies which do not carry this BioBrick anymore.

A strong constitutive promoter which was used to create BioBrick <partinfo>K389318</partinfo> to test the firefly luciferase BioBrick <partinfo>K389004</partinfo> and the luciferase measurement system.

A weak constitutive promoter which was used to create BioBrick <partinfo>K389302</partinfo> to test the firefly luciferase BioBrick <partinfo>K389004</partinfo> and the luciferase measurement system.

This medium strong constitutive promoter from the registry was assembled before our BioBricks, so they are neither expressed too strong, so the cell suffers from metabolomic stress, nor too weak, so there is no visible effect of our BioBricks. This BioBrick was used e.g. in <partinfo>K389010</partinfo> or <partinfo>K389011</partinfo>.

A medium strong constitutive promoter which was used to create BioBrick <partinfo>K389307</partinfo> to test the firefly luciferase BioBrick <partinfo>K389004</partinfo> and the luciferase measurement system.

This BioBrick was used to create a plasmid without ColE1 ori. The R6K ori has a different compatibility class than the ColE1 ori. So it is used for a two plasmid screening system. The R6K ori is a medium copy plasmid in pir+ / pir116 E. coli strains like EC100D but it does not replicate in pir- strains like E. coli TOP10. So it is easy to separate a ColE1 ori plasmid from another with R6K ori by simply transforming both to e.g. E. coli TOP10. The R6K ori was cloned into the pSB1C3 plasmid. Subsequently, the plasmid containing the R6K ori was digested with Hin6I. The largest fragment was extracted from an agarose gel and ligated with T4 DNA Polymerase. Thereby the ColE1 ori was removed, leaving a small fragment of about 30 bp.

We wanted to use this virA BioBrick from the registry but problems occurred ( characterization), so we created our own virA from Agrobacterium tumefaciens C58 TI-plasmid. Our own (working) virA has the partnumber <partinfo>K389001</partinfo>.

The same problems occurred as with the virA BioBrick - this one from the registry does not work properly, so we made a vir-promoter by ourselves (<partinfo>K389003</partinfo>). The part that was sent to us is actually a tetR gene (<partinfo>C0040</partinfo>) under the control of a constitutive promoter (<partinfo>J23105</partinfo>) before a double terminator (<partinfo>B0015</partinfo>, compare our sequencing results).

The VirA receptor is used by A. tumefaciens to detect acetosyringone and other phenolic substances which are secreted by plants after injury. In presence of these substances VirA phosphorylates itself and afterwards VirG, a response regulator which activates vir promoters. These promoters control genes which are used for infecting the injured plant. This virA gene was isolated from the TI-plasmid of A. tumefaciens C58. An illegal PstI restriction site was removed by site-directed mutagenesis. The functionality of this BioBrick was proved with <partinfo>K389015</partinfo> and <partinfo>K389016</partinfo>.

This is the VirG response regulator from the VirA/G receptor system. The VirA/G receptor system is used by A. tumefaciens to detect phenolic substances secreted by injured plants, e.g. acetosyringone. In presence of these substances, VirG is activated by the VirA receptor and induces the transcription of genes under the control of a vir promoter. Normally, VirG needs the rpoA gene (RNA polymerase subunit) from A. tumefaciens to work in Escherichia coli but this virG BioBrick is mutated, so it works with the rpoA subunit from E. coli. For this reason the point mutations G56V and I77V were brought into the gene ([http://www.springerlink.com/content/wmq06kua5qkma1au/ YC Jung et al., 2004]). Because this BioBrick is synthesized (Mr. Gene GmbH), codon usage is optimized for E. coli and illegal restriction sites were removed. When you use this virG gene in a VirA/G signaling system you do not need <partinfo>BBa_K238010</partinfo> anymore to get the system working in E. coli.

Vir-promoters from A. tumefaciens are induced by phosphorylated VirG response regulators and control genes for infecting plants in their natural host. They are part of the VirA/G signal transduction system. This is a vir promoter from A. tumefaciens C58. It is located on the TI-plasmid upstream the virB genes.

This is a BioBrick for a firefly (Photinus pyralis) luciferase. It is a sensitive reporter gene. It was isolated from Promega's pGL4.10[luc2] plasmid.

This is a kanamycin / neomycin resistance gene without promoter or RBS. It is used for directed evolution of virA and mutated virA screenings, respectively. It was isolated from the BioBrick <partinfo>P1003</partinfo> (a kanamycin resistance gene with promoter and RBS).

This part is for expressing a VirA receptor. A medium strong constitutive promoter is used, so there is enough VirA receptor expressed but not too much so the cell suffers from the expression (VirA is a membrane protein). This version exists in a <partinfo>pSB1C3</partinfo> and a <partinfo>pSB1AT3</partinfo> vector. We used the BioBrick in the <partinfo>pSB1AT3</partinfo> plasmid for error-prone PCR and later in our two plasmid screening system together with the <partinfo>K389011</partinfo> VirA-screening device.

This BioBrick contains the new, mutated virG which works in E. coli without the rpoA gene from A. tumefaciens which is expressed constitutively and a kanamycin resistance gene which is under the control of a vir promoter. It is used to screen mutants of virA which are on a different plasmid in a <partinfo>K389010</partinfo>-like part and were created by error-prone PCR. The better the VirA receptor recognizes a substance the more resistant the cell is against kanamycin. This device has to be on a plasmid with different ori than the virA which should be screened (different compatibility classes). We cloned this BioBrick into a plasmid with R6K ori which only replicates in pir+ or pir116 strains (e.g. E. coli EC100D), so we can easily seperate the two plasmids by transforming them into strains without Pir protein (e.g. E. coli TOP10).

This BioBrick is similar to <partinfo>K389011</partinfo> but with the reporter luciferase instead of an antibiotic resistance gene. With this BioBrick it is possible to measure the activity of the vir promoter and the VirA receptor, respectively.

This BioBrick is similar to <partinfo>K389011</partinfo> but with the reporter mRFP instead of an antibiotic resistance gene. With this BioBrick it is possible to measure the activity of the vir promoter and the VirA receptor, respectively.

This BioBrick is an assembly of <partinfo>K389010</partinfo> and <partinfo>K389011</partinfo>. It is used for testing the general screening concept of expressing an antibiotic resistance with a vir promoter after induction with acetosyringone (the natural VirA inductor).

This BioBrick is an assembly of <partinfo>K389010</partinfo> and <partinfo>K389012</partinfo>. It is used for characterizing the natural VirA/G system and the vir promoter, respectively. It is also possible to demonstrate the functionality of four new created BioBricks in one device.

This BioBrick is an assembly of <partinfo>K389010</partinfo> and <partinfo>K389013</partinfo>. It is used for characterizing the natural VirA/G system and the vir promoter, respectively.

This is a complete VirA/G signaling system without a reporter gene, so any gene of interest can be assembled to a vir promoter. We assembled some sensitivity tuners and a luciferase gene behind this BioBrick, so we get an enhanced luciferase signal (e.g. in part <partinfo>K389421</partinfo>).

A lac operator is combined with a lacI^q so there is always enough lacI to repress the lac operator. The system is still inducible with IPTG but it has a low basal transcription (in theory). This part should be used to test the sensitivity of the luciferase BioBrick <partinfo>K389004</partinfo> and compare it to the sensitivity of the mRFP BioBrick <partinfo>E1010</partinfo>. But the part did not work as expected - it had a very high basal expression. The problem is probably the lacI gene <partinfo>C0012</partinfo> from the registry which has a degradation tag. Either this tag leads to that quick degradation, that the lacI repressor cannot work as a repressor anymore or the repressor itself does not work properly.

The part <partinfo>K389050</partinfo> is combined with a luciferase gene as reporter. But <partinfo>K389050</partinfo> does not work as expected so this part could not be used for its original purpose (demonstrating the sensitivity of the firefly luciferase).

The part <partinfo>K389050</partinfo> is combined with a mRFP gene as reporter. But <partinfo>K389050</partinfo> does not work as expected so this part could not be used for its original purpose (comparing the sensitivity of mRFP with the sensitivity of the firefly luciferase).

Luciferase under the control of a weak constitutive promoter.

Luciferase under the control of a medium strong constitutive promoter.

Luciferase under the control of a strong constitutive promoter.

The <partinfo>I746370</partinfo> sensitivity tuner was modified: the arabinose promoter and the GFP readout were erased from the original part and a firefly luciferase BioBrick was added as a new readout. This part can be used behind a random promoter and gives an enhanced luciferase readout signal.

The <partinfo>I746380</partinfo> sensitivity tuner was modified: the arabinose promoter and the GFP readout were erased from the original part and a firefly luciferase BioBrick was added as a new readout. This part can be used behind a random promoter and gives an enhanced luciferase readout signal.

The <partinfo>I746390</partinfo> sensitivity tuner was modified: the arabinose promoter and the GFP readout were erased from the original part and a firefly luciferase BioBrick was added as a new readout. This part can be used behind a random promoter and gives an enhanced luciferase readout signal.

This is a modified <partinfo>I746370</partinfo> sensitivity tuner with luciferase readout behind a vir promoter. This part also contains a virG gene under the control of a constitutive promoter. The plan is to assemble a mutated virA from a <partinfo>K389010</partinfo>-like BioBrick in front of this part to get a strong readout signal in order to reach our goal - make spiciness visible. The mutated virA is generated with error-prone PCR and screened together with the <partinfo>K389011</partinfo> Biobrick.

This is a modified <partinfo>I746380</partinfo> sensitivity tuner with luciferase readout behind a vir promoter. This part also contains a virG gene under the control of a constitutive promoter. The plan is to assemble a mutated virA from a <partinfo>K389010</partinfo>-like BioBrick in front of this part to get a strong readout signal in order to reach our goal - make spiciness visible. The mutated virA is generated with error-prone PCR and screened together with the <partinfo>K389011</partinfo> Biobrick.

This is a modified <partinfo>I746390</partinfo> sensitivity tuner with luciferase readout behind a vir promoter. This part also contains a virG gene under the control of a constitutive promoter. The plan is to assemble a mutated virA from a <partinfo>K389010</partinfo>-like BioBrick in front of this part to get a strong readout signal in order to reach our goal - make spiciness visible. The mutated virA is generated with error-prone PCR and screened together with the <partinfo>K389011</partinfo> Biobrick.

This is a modified <partinfo>I746370</partinfo> sensitivity tuner with luciferase readout behind a vir promoter characterisation BioBrick, so it also contains a virG and an unmutated virA gene under the control of a constitutive promoter. This BioBrick is used to prove the function of the modified sensitivity tuner and to check whether the sensitivity tuner enhances the luciferase signal enough to make it visible.

This is a modified <partinfo>I746380</partinfo> sensitivity tuner with luciferase readout behind a vir promoter characterisation BioBrick, so it also contains a virG and an unmutated virA gene under the control of a constitutive promoter. This BioBrick is used to prove the function of the modified sensitivity tuner and to check whether the sensitivity tuner enhances the luciferase signal enough to make it visible.

This is a modified <partinfo>I746370</partinfo> sensitivity tuner with luciferase readout behind a vir promoter characterisation BioBrick, so it also contains a virG and an unmutated virA gene under the control of a constitutive promoter. This BioBrick is used to prove the function of the modified sensitivity tuner and to check whether the sensitivity tuner enhances the luciferase signal enough to make it visible.

This kanamycin resistance cassette BioBrick was used as a template to create <partinfo>K389005</partinfo>.

The ccdB gene targets the gyrase of Escherichia coli and is lethal for all E. coli strains without the gyrase mutation gyrA462 ([http://openwetware.org/wiki/CcdB openwetware]). The ccdB BioBrick is used for the 3A-assembly as a positive selection marker.

This plasmid was used in 3A-assemblies and as the backbone of the mutated and unmutated <partinfo>K389010</partinfo> part.

This is the plasmid used to submit the BioBricks.

This is a lac operator which is inducible with IPTG and repressed by lacI. It was used to build a tightly regulated lac operator (<partinfo>K389050</partinfo>) by adding a lacI repressor gene under the control of the lacI^q promoter.