Part:BBa_I13453

Pbad promoter

PBad promoter from I0500 without AraC.

Usage and Biology

Has been used as a second promoter in a system containing BBa_I0500 (PBad+AraC). In this system, it showed behavior qualitatively indistinguishable from the BBa_I0500 copy of PBad. Has not been tested independent of AraC. A second part, BBa_I13458, should allow decoupling of PBad and AraC.

See this OpenWetWare article on [http://openwetware.org/wiki/Titratable_control_of_pBAD_and_lac_promoters_in_individual_E._coli_cells#pBAD_promotersOpenWetWare pBAD and lac promoters] for additional usage and biology information

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  INCOMPATIBLE WITH RFC[12]

  Illegal NheI site found at 125
  
• 21
  INCOMPATIBLE WITH RFC[21]

  Illegal BamHI site found at 65
  
• 23
  COMPATIBLE WITH RFC[23]
• 25
  COMPATIBLE WITH RFC[25]
• 1000
  COMPATIBLE WITH RFC[1000]

Characterization

For the 2009 iGEM competition, British_Columbia characterized BBa_I13453 in the context of a pBAD promoter family. For the results of this characterization, see here.

For the 2010 iGEM competition, Tec-Monterrey characterized BBa_I13453 again, using a construct of GFP reporter after the pBad promoter. The transfer function was modeled with a Hill equation.

Figure 1. Transfer function of BBa_I13453. Points represent individual measurements. The line is of a Hill equation fitted to our data.

(d[GFP]/dt)/OD₆₀₀ = C+A*Xⁿ/(Xⁿ+Kⁿ)

Experiment	Characteristic	Value
Transfer Function	Basal rate (C)	1 d[GFP]/dt
	Gain (A)	36 d[GFP]/dt
	Hill coefficient (n)	2.16
	Switch Point (K)	2.8 [ara] (µM)