Difference between revisions of "Part:BBa K2762014"
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<partinfo>BBa_K2762014 short</partinfo> | <partinfo>BBa_K2762014 short</partinfo> | ||
| − | === | + | ===Background=== |
The asr promoter was first described by Suziedeliene et al. in 1999. They showed that asr is induced under low pH which is about pH 4.8, and it is controlled by the phoBR system. From the article they have published, the promoter is named as acid shock RNA (asr) promoter due to the RNA that has been transcribed after putting the <i>E. coli</i> into a low pH condition. | The asr promoter was first described by Suziedeliene et al. in 1999. They showed that asr is induced under low pH which is about pH 4.8, and it is controlled by the phoBR system. From the article they have published, the promoter is named as acid shock RNA (asr) promoter due to the RNA that has been transcribed after putting the <i>E. coli</i> into a low pH condition. | ||
| − | In 2007 Ogasawara et al2. found out that there is another regulatory system that controlling asr transcription by using SELEX to find the binding sequences of PhoQP-RstBA. Hence the asr promoter is directly controlled by two different systems, the | + | In 2007 Ogasawara et al2. found out that there is another regulatory system that controlling asr transcription by using SELEX to find the binding sequences of PhoQP-RstBA. Hence the asr promoter is directly controlled by two different systems, the phoBR system activated through low inorganic phosphate and the RstAB system sensing the pH while it is controlled by PhoQP-system activated by low Mg<sup>2+</sup> concentrations. |
| − | === | + | ===Function of asr promoter in sfGFP reporting system=== |
| − | + | To expand the possible application of asr promoter, 2018 iGEM NCKU_Tainan put it together with sfGFP and tested this reporting system with more delicate pH gradings since a green fluorescent would be expressed once the promoter has been activated. In conclusion, we could monitor the pH in the surrounding medium in our device at any time by observing the color change of the medium. | |
[[File:T--NCKU Tainan--part BBa K2762014.png|200px|centre]] | [[File:T--NCKU Tainan--part BBa K2762014.png|200px|centre]] | ||
Revision as of 09:54, 12 October 2018
Pasr-B0034-sfGFP
Background
The asr promoter was first described by Suziedeliene et al. in 1999. They showed that asr is induced under low pH which is about pH 4.8, and it is controlled by the phoBR system. From the article they have published, the promoter is named as acid shock RNA (asr) promoter due to the RNA that has been transcribed after putting the E. coli into a low pH condition.
In 2007 Ogasawara et al2. found out that there is another regulatory system that controlling asr transcription by using SELEX to find the binding sequences of PhoQP-RstBA. Hence the asr promoter is directly controlled by two different systems, the phoBR system activated through low inorganic phosphate and the RstAB system sensing the pH while it is controlled by PhoQP-system activated by low Mg2+ concentrations.
Function of asr promoter in sfGFP reporting system
To expand the possible application of asr promoter, 2018 iGEM NCKU_Tainan put it together with sfGFP and tested this reporting system with more delicate pH gradings since a green fluorescent would be expressed once the promoter has been activated. In conclusion, we could monitor the pH in the surrounding medium in our device at any time by observing the color change of the medium.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal AgeI site found at 314
- 1000COMPATIBLE WITH RFC[1000]