Difference between revisions of "Team:UNITN-Trento/Modeling"

m
m
Line 19: Line 19:
 
<header>
 
<header>
 
<h2><strong>Modeling</strong></h2>
 
<h2><strong>Modeling</strong></h2>
−
<p>Modeling</p>
+
<p>Can we relate light incidence to ATP production?</p>
 
 
 
</header>
 
</header>
Line 30: Line 30:
 
<div class="content">
 
<div class="content">
 
<header>
 
<header>
−
<h3 class="wow fadeInDown">Title</h3>
+
<h3 class="wow fadeInDown">Introduction</h3>
 
</header>
 
</header>
−
<p>$R_{PR=}\left( \frac{V_{\max }\cdot I}{K_{m}+I} \right)^{-1}$</p>
+
<p><span class="i_enph">We really want to thank the team iGEM Kent 2015 for this modeling born from the collaboration between the two groups</span>.</p>
 +
<p>Proteorhodopsin is a light-powered proton pump. This protein has the property to use light energy to generate an outward proton flux that can subsequently power cellular processes, such as ATP synthesis.After having experimentally assessed that our engineered E. coli was able to produce more ATP thanks to the proteorhodopsin, we decided to quantify this effect by modeling the amount of ATP that can be produced in function of the proteorhodopsin’s activation.</p>
 +
</div>
 +
<div class="content">
 +
<header>
 +
<h3 class="wow fadeInDown">What is the number of ATP molecules that can be produced per second as a function of light irradiance that hits the bacterial membrane?</h3>
 +
</header>
 +
<p>Once a photon is absorbed by proteorhodopsin (PR), PR must complete its photocycle before it can absorb another photon [1]. At high light irradiance, this leads to saturation. For this we choose to exploit the Michaelis-Menten kinetics, where V_max is the maximum rate of the system and the Michaelis-Menten constant, K_m, is the substrate concentration at which the reaction rate is $\frac{1}{2}V\max$</p>
 +
<p>Walter et al. demonstrated that the system is analogous to a circuit (figure 1), in this circuit representation; the proteorhodopsin (PR) acts like a battery with internal resistance. [2][3]</p>
 
</div>
 
</div>
 
</section>   
 
</section>   

Revision as of 13:51, 17 September 2015

Modeling

Can we relate light incidence to ATP production?

Introduction

We really want to thank the team iGEM Kent 2015 for this modeling born from the collaboration between the two groups.

Proteorhodopsin is a light-powered proton pump. This protein has the property to use light energy to generate an outward proton flux that can subsequently power cellular processes, such as ATP synthesis.After having experimentally assessed that our engineered E. coli was able to produce more ATP thanks to the proteorhodopsin, we decided to quantify this effect by modeling the amount of ATP that can be produced in function of the proteorhodopsin’s activation.

What is the number of ATP molecules that can be produced per second as a function of light irradiance that hits the bacterial membrane?

Once a photon is absorbed by proteorhodopsin (PR), PR must complete its photocycle before it can absorb another photon [1]. At high light irradiance, this leads to saturation. For this we choose to exploit the Michaelis-Menten kinetics, where V_max is the maximum rate of the system and the Michaelis-Menten constant, K_m, is the substrate concentration at which the reaction rate is $\frac{1}{2}V\max$

Walter et al. demonstrated that the system is analogous to a circuit (figure 1), in this circuit representation; the proteorhodopsin (PR) acts like a battery with internal resistance. [2][3]