Team:Bielefeld-CeBiTec/Results/CO2-fixation/Carboxysome

From 2014.igem.org

(Difference between revisions)
(some changes)
(extern table opti)
Line 96: Line 96:
   </div>
   </div>
</div>
</div>
 +
 +
 +
 +
 +
 +
 +
 +
 +
 +
 +
 +
 +
 +
<b>Table1:</b> Functions of different proteins encoded by the carboxysomal operon of <i>H.neapolitanus</i>.
 +
<table width="100%" border="1" cellpadding="5" style="background-color:transparent">
 +
<tr>
 +
<th>Protein</th>
 +
<th>Function</th>
 +
</tr>
 +
<tr> <td>CsoS1ABC</td>  <td>-----</td></tr>
 +
<tr> <td>CsoS1D</td>  <td>-----</td></tr>
 +
<tr> <td>CsoS2</td>  <td>-----</td></tr>
 +
<tr> <td>CsoS3</td> <td>-----</td></tr>
 +
<tr> <td>CsoS4AB</td> <td>-----</td></tr>
 +
</table>

Revision as of 18:55, 15 October 2014



CO2 fixation

Theory

The carboxysome is a protein-enveloped microcompartement for the carbon fixation in cyanobacteria like Synechococus elangatus or sulfur bacteria like Halothiobacillus neapolitanus. It is composed of thousands of subunits including hexameric and pentameric proteins that form a shell to encapsulate the enzymes Ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) and the carbonic anhydrase. The compartimentalization allows an incrasing substrate concentration for the RubisCO within this microcompartement and therefore an improved catalytic efficiency of the encapsulated enzymes.
First of all carbonate (HCO3-) diffuse into the caboxysome and is than converted into carbon dioxide (CO2) enabling high substrate concentration for the RuBisCO, which catalyzse the fixation of carbon dioxide and ribulose 1,5-bisphosphate into 3-phosphogylcerate. In the presence of oxygen (O2) the RuBisCO produces phosphoglycolate, a waste product which must be recycled by the cell. As carbon dioxide and oxygen competivly bind as substrates of the RubisCO, the accumulation of carbon dioxide by the carbonic anhydrase and the prevention of oxygen diffusion by the barrier of the carboxysome shell enables an efficient carbon dioxide fixation

GFP-Fusion

Cloaning approach and purification

Table1: Functions of different proteins encoded by the carboxysomal operon of H.neapolitanus.
Protein Function
CsoS1ABC -----
CsoS1D -----
CsoS2 -----
CsoS3 -----
CsoS4AB -----

Retrieved from "http://2014.igem.org/Team:Bielefeld-CeBiTec/Results/CO2-fixation/Carboxysome"