Part:BBa_K1217003

pT7-ppk1(K.oralis)

Polyphosphate kinase (ppk1) (E.C. 2.7.4.1) catalyzes the formation of polyphosphate from ATP. In BBa_K1217003, ppk1 was under the control of T7 promotor. Under iptg induction, over-expression of ppk1 can reduce the phosphate level in the medium by its incorporation into polyphosphate synthesis inside the bacteria.

Usage and Biology

Efficiency of this construct is compared with Two other designs BBa_K1217008 and BBa_K1217010. We test the constructs' efficiency from 2 parameters: poly-P synthesis efficiency and phosphate removal efficiency from the medium.

Expected model of BBa_K1217003

Expected model of BBa_K1217008

Expected model of BBa_K1217010

Expression of ppk1 enzyme

We confirm the expression of PPK1 enzyme in e.coli.

SDS-PAGE analysis of expression of K.oralis PPK1 enzyme inside E.coli. Expression of PPK1 is induced by 0.5mM IPTG at 30 degree for 5 hours. Band marked with star is the PPK1 enzyme, the enzyme expressed is soluble.

Efficiency in phosphate removal from the environment

Testing

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  COMPATIBLE WITH RFC[21]
• 23
  COMPATIBLE WITH RFC[23]
• 25
  COMPATIBLE WITH RFC[25]
• 1000
  INCOMPATIBLE WITH RFC[1000]

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