Difference between revisions of "Nucleosid diphosphate kinase"

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Random order Bi-Bi rate law is used
 
Random order Bi-Bi rate law is used
  
<center><math>\frac{ \frac{V_{max}}{K_m^{ATP}K_m^{UDP}}\left( [ATP][UDP] - \frac{[ADP][UTP]}{K_{eq}}  \right)  }  {1}</math></center>
+
<center><math>\frac{ \frac{V_{max}}{K_m^{ATP}K_m^{UDP}}\left( [ATP][UDP] - \frac{[ADP][UTP]}{K_{eq}}  \right)  }  { \left( 1 + \frac{[ATP]}{K_{m}^{ATP}}  \right)\left( 1 + \frac{[UDP]}{K_{m}^{UDP}}  \right) + \left( 1 + \frac{[ADP]}{K_{m}^{ADP}}  \right)\left( 1 + \frac{[UTP]}{K_{m}^{UTP}}  \right) -1 }</math></center>

Revision as of 10:43, 13 May 2014

Nucleoside-diphosphate kinases are enzymes that catalyze the exchange of phosphate groups between different nucleotides. The overall effect of NDKs is to transfer a phosphate group from a nucleoside triphosphate to a nucleoside diphosphate. Starting with ATP and UDP, the activity of NDK produces ADP and UTP.

Chemical equation

ATP + UDP \leftrightarrow ADP + UTP

Rate equation

Random order Bi-Bi rate law is used

\frac{ \frac{V_{max}}{K_m^{ATP}K_m^{UDP}}\left( [ATP][UDP] - \frac{[ADP][UTP]}{K_{eq}}  \right)  }  { \left( 1 + \frac{[ATP]}{K_{m}^{ATP}}  \right)\left( 1 + \frac{[UDP]}{K_{m}^{UDP}}  \right) + \left( 1 + \frac{[ADP]}{K_{m}^{ADP}}  \right)\left( 1 + \frac{[UTP]}{K_{m}^{UTP}}  \right) -1 }