Difference between revisions of "Part:BBa K427006"

 
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<partinfo>BBa_K427006 short</partinfo>
 
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This is a sensitivity tuner created form the Mor  protein and Pm promoter of the Mu bacteriophage it can be used to increase the PoPS of a construct. The Mor protein encoded in the first part of the construct is the activator of the Pm promoter, which does not begin transcription until the Mor protein binds to its consensus sequence and attracts the polymerase.
 
This is a sensitivity tuner created form the Mor  protein and Pm promoter of the Mu bacteriophage it can be used to increase the PoPS of a construct. The Mor protein encoded in the first part of the construct is the activator of the Pm promoter, which does not begin transcription until the Mor protein binds to its consensus sequence and attracts the polymerase.
  
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===Usage and Biology===
 
===Usage and Biology===
  
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The activation of the promoter requires the holenzyme σ70, which normally binds to the -35 and -10 consensus sequences, the promoter has the -10 but does not have the -35 sequences instead it has another sequence approximately at -51 where the activator protein binds. Once the protein is located there, the holenzyme σ70 recognizes the promoter and transcription begins.
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This device was designed with two purposes in mind, increase the PoPS output of the pBad promoter (any promoter would work) and change its almost linear production into an almost Boolean one. This part has the following structure: activator protein, transcriptional stop and phage promoter. The sensitivity tuner can be used to achieve both purposes on any construction they just have to be inserted between the desired promoter and the desired coding sequence.
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This part has no special safety considerations.
 
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<span class='h3bb'>Sequence and Features</span>
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===<span class='h3bb'>Sequence and Features</span>===
 
<partinfo>BBa_K427006 SequenceAndFeatures</partinfo>
 
<partinfo>BBa_K427006 SequenceAndFeatures</partinfo>
  
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===Functional Parameters===
 
===Functional Parameters===
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It was characterized by using the <partinfo>BBa_K427008</partinfo> device.Which means that it was characterized by adding a bidirectional terminator <partinfo>BBa_B0014</partinfo>, PBad Weak <partinfo>BBa_K206001</partinfo> the sensitivity tuner (BBa_K427006) and GFP reporter <partinfo>BBa_E0840</partinfo>.
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[[Image:MuMor.png|center|frame|Figure 1. Transfer function of <partinfo>BBa_K427006</partinfo>. Points represent individual measurements. The line is of a Hill equation fitted to our data.]]
 
<partinfo>BBa_K427006 parameters</partinfo>
 
<partinfo>BBa_K427006 parameters</partinfo>
 
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<center>
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(d[GFP]/dt)/OD<sub>600</sub> = C+A*X<sup>n</sup>/(X<sup>n</sup>+K<sup>n</sup>)
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{|{{Table}}
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!Experiment
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!Characteristic
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!Value
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|-
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|rowspan="4"|[[#Transfer Function|'''Transfer Function''']]
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|''Basal rate (C)''
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|0.96 (d[GFP]/dt)/OD<sub>600</sub>
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|-
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|''Gain (A)''
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|5.14 (d[GFP]/dt)/OD<sub>600</sub>
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|-
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|''Hill coefficient (n)''
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|17.0
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|-
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|''Switch Point (K)''
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|57.3 [ara] (µM)
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|-
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|}
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</center>
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===References===
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<partinfo>BBa_F2620</partinfo> Parts Registry entry with characterisation.
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Kumaraswami, M., & Howe, M. a.-W. (2004). Crystal Structure of the Mor Protein of Bacteriophage Mu, a Member of the Mor/C Family of Transcription Activators. The Journal of biological Chemistry, 16581–16590.

Latest revision as of 11:30, 27 October 2010

MuMor Sensitivity tuner (PoPS->PoPS)

This is a sensitivity tuner created form the Mor protein and Pm promoter of the Mu bacteriophage it can be used to increase the PoPS of a construct. The Mor protein encoded in the first part of the construct is the activator of the Pm promoter, which does not begin transcription until the Mor protein binds to its consensus sequence and attracts the polymerase.

Usage and Biology

The activation of the promoter requires the holenzyme σ70, which normally binds to the -35 and -10 consensus sequences, the promoter has the -10 but does not have the -35 sequences instead it has another sequence approximately at -51 where the activator protein binds. Once the protein is located there, the holenzyme σ70 recognizes the promoter and transcription begins.

This device was designed with two purposes in mind, increase the PoPS output of the pBad promoter (any promoter would work) and change its almost linear production into an almost Boolean one. This part has the following structure: activator protein, transcriptional stop and phage promoter. The sensitivity tuner can be used to achieve both purposes on any construction they just have to be inserted between the desired promoter and the desired coding sequence.

This part has no special safety considerations.

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
    COMPATIBLE WITH RFC[1000]

Functional Parameters

It was characterized by using the BBa_K427008 device.Which means that it was characterized by adding a bidirectional terminator BBa_B0014, PBad Weak BBa_K206001 the sensitivity tuner (BBa_K427006) and GFP reporter BBa_E0840.

Figure 1. Transfer function of BBa_K427006. 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) 0.96 (d[GFP]/dt)/OD600
Gain (A) 5.14 (d[GFP]/dt)/OD600
Hill coefficient (n) 17.0
Switch Point (K) 57.3 [ara] (µM)

References

BBa_F2620 Parts Registry entry with characterisation.

Kumaraswami, M., & Howe, M. a.-W. (2004). Crystal Structure of the Mor Protein of Bacteriophage Mu, a Member of the Mor/C Family of Transcription Activators. The Journal of biological Chemistry, 16581–16590.