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| <div class="large-9 columns" id="content-page"> | | <div class="large-9 columns" id="content-page"> |
- | <div class="title"><h1>Imaging with Colors</h1></div> | + | <div class="title"><h1>Imaging with Colors</h1> |
| + | <div data-magellan-expedition="fixed"> |
| + | <dl class="sub-nav"> |
| + | <dd data-magellan-arrival="green"><a herf="#green">Green</a></dd> |
| + | <dd data-magellan-arrival="red"><a herf="#red">Red</a></dd> |
| + | <dd data-magellan-arrival="blue"><a herf="#blue">Blue</a></dd> |
| + | </dl> |
| + | </div> |
| + | </div> |
| <div class="text"> | | <div class="text"> |
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- | <p>we engineered three light-sensing systems wherein transcription from an output promoter is controlled by different light wavelengths. <br /> | + | <p>we engineered <b>three light-sensing systems</b> wherein transcription from an output promoter is controlled by different light wavelengths. <br /> |
| The three system is differently designed but they have the same result-----Different-colored lights activate expression of corresponding florescent protein. </p> | | The three system is differently designed but they have the same result-----Different-colored lights activate expression of corresponding florescent protein. </p> |
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- | <p>Each TCS comprises a light-switchable sensor histidine kinase (SK) containing an N-terminal phytochrome-family photosensory domain and a C-terminal bifunctional kinase-phosphatase signaling domain. </p> | + | <p>Each <i>TCS</i> comprises a light-switchable sensor <i>Histidine Kinase</i> (SK) containing an N-terminal phytochrome-family photosensory domain and a C-terminal bifunctional kinase-phosphatase signalling domain. </p> |
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- | <h2 id="green">Green</h2> | + | <a name="green"></a> |
| + | <h2 data-magellan-destination="green">Green</h2> |
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- | <p>In the green light-inducible system, the SK CcaS is produced in a green-absorbing ground state, termed Pg. <br /> | + | <p>In the green light-inducible system, the <i>SK CcaS</i> is produced in a green-absorbing ground state, termed Pg. <br /> |
- | In dark, no light activate the whole circuit so there is no florescent protein produced. Absorption of red light switches CcaS Pr back to Pg, which dephosphorylates phospho-CcaR, deactivating transcription.</p> | + | In dark, no light activate the whole circuit so there is no florescent protein produced. Absorption of red light switches <i>CcaS</i> Pr back to Pg, which dephosphorylates phospho-<i>CcaR</i>, deactivating transcription.</p> |
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- | <p>Absorption of green light flips CcaS to a kinase-active red-absorbing state (Pr) that phosphorylates the response regulator CcaR, which then binds to the cpcG2 promoter and activates the transcription of GFP.</p> | + | <p>Absorption of green light flips <i>CcaS</i> to a kinase-active red-absorbing state (Pr) that phosphorylates the response regulator <i>CcaR</i>, which then binds to the <i>cpcG2</i> promoter and activates the transcription of GFP.</p> |
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- | <h2 id="red">Red</h2> | + | <a name="red"></a> |
| + | <h2 data-magellan-destination="red">Red</h2> |
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| <p>In the red light-inducible system, The SK Cph8 is produced in a kinase-active Pr state . <br /> | | <p>In the red light-inducible system, The SK Cph8 is produced in a kinase-active Pr state . <br /> |
- | In dark, Chp8 phosphorylates the response regulator OmpR, activating the transcription from the ompC promoter thus produced more lamda C1. The increase of lamda C1 repress its transcription of downstream promoter for RFP. <br /> | + | In dark, Chp8 phosphorylates the response regulator OmpR, activating the transcription from the ompC promoter thus produced more lambda C1. The increase of lambda C1 repress its transcription of downstream promoter for <i>RFP</i>. <br /> |
- | Red light switches Cph8 Pr to a far red–absorbing state (Pfr), which dephosphorylates phospho-OmpR, deactivating the transcription of OmpR. So the inverter has no affect and RFPs are continuously transcribed. </p> | + | Red light switches <i>Cph8</i> Pr to a far red–absorbing state (Pfr), which dephosphorylates phospho-<i>OmpR</i>, deactivating the transcription of <i>OmpR</i>. So the inverter has no affect and <i>RFPs</i> are continuously transcribed. </p> |
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- | <h2 id="blue">Blue</h2> | + | <a name="blue"></a> |
| + | <h2 data-magellan-destination="blue">Blue</h2> |
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- | <p>In the blue light-inducible system, FixK2 promoter is the downstream signaling promoter of YF1/FixJ blue light-sensing system. The YF1/FixJ system become inactive when illuminated by blue and active in darkness. An inverter is placed behind FixK2 promoter. <br /> | + | <p>In the blue light-inducible system, <i>FixK2</i> promoter is the downstream signalling promoter of <i>YF1/FixJ</i> blue light-sensing system. The <i>YF1/FixJ</i> system become inactive when illuminated by blue and active in darkness. An inverter is placed behind <i>FixK2</i> promoter. <br /> |
- | In the absence of blue light, YF1 phosphorylates FixJ that activates FixK2 promoter, allowing the transcription of lamda C1, thus repressing the amilCP output (Blue Chromophore Protein). <br /> | + | In the absence of blue light, <i>YF1</i> phosphorylates <i>FixJ</i> that activates <i>FixK2</i> promoter, allowing the transcription of lambda <i>C1</i>, thus repressing the <i>amilCP</i> output (Blue Chromophore Protein). <br /> |
- | In light, however, YF1/FixJ has no effect on FixK2 promoter, which in turn has near-zero activity. The lamda C1 repressor concentration drops, eventually amilCP will be produced.</p> | + | In light, however, <i>YF1/FixJ</i> has no effect on <i>FixK2</i> promoter, which in turn has near-zero activity. The lambda <i>C1</i> repressor concentration drops, eventually <i>amilCP</i> will be produced.</p> |
| </div> | | </div> |
| </div> | | </div> |
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| {{:Team:USTC-China/partials/footer}} | | {{:Team:USTC-China/partials/footer}} |
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