Chiba/Communication

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(Our Aim)
(About Quorum Sensing)
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===About Quorum Sensing===
===About Quorum Sensing===
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[[Image:Chiba_aboutqs.png|frame|'''Fig2.''' Constructed circuit of Quorum sensing in our system.]]
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[[Image:Chiba_aboutqs.png|frame|'''Fig14.''' Constructed circuit of Quorum sensing in our system.]]
Quorum sensing is a cell-to-cell signaling action of bacteria.
Quorum sensing is a cell-to-cell signaling action of bacteria.
They detect the cell density of the same species and coordinate the expression behavior of their cells.
They detect the cell density of the same species and coordinate the expression behavior of their cells.

Revision as of 05:04, 27 October 2007

Chiba logo.png

Introduction | Project Design ( 1.Affinity Tag | 2.Communication Module | 3.Size Control ) | Making Marimos | Our Goal
Acknowledgements | Team Members | [http://chem.tf.chiba-u.jp/igem/ iGEM Chiba Website] | メンバ連絡簿


Communication Unit

Our Aim

Fig13. Quorum sensing for activating receivers!

Our aim is to make bacteria stick around a bacteria core. Make a sender, a bacteria core that sends a signal, and a receiver, a bacteria that receive a signal. Our system works like this: Sender core, which is sticking each other in advance, sends a signal to receivers, which grow stickey tags. Then they stick together. We use Quorum sensing as a signal.

About Quorum Sensing

Fig14. Constructed circuit of Quorum sensing in our system.

Quorum sensing is a cell-to-cell signaling action of bacteria. They detect the cell density of the same species and coordinate the expression behavior of their cells. Species of Gram-Negative signaling transfer molecules (so-called autoinducer) is a series of acyl homoserine lactone (AHL). When the AHL concentration exceeds a threshold, that is, the cell population is over a certain number, the promoter plux transcription is activated.

Detailed gene circuit is discribed in Fig. 2.

  • more about quorum sensing

[http://partsregistry.org/Featured_Parts:Cell-Cell-Signaling Cell-Cell-Signaling]

[http://www.che.caltech.edu/groups/fha/quorum.html About Quorum sensing]

Experiments: New Parts!!

Recievers

New Parts We Made!!

  • AHL > GFP generator (constitutive aiiA) : [http://partsregistry.org/Part:BBa_I729006 BBa_T729006]
    • BBa I729006 circuit.jpg
  • AHL > GFP & aiiA generator : [http://partsregistry.org/Part:BBa_I729005 BBa_I729005]
    • BBa I729005 circuit.jpg
  • Sensitive AHL > GFP generator : [http://partsregistry.org/Part:BBa_I729004 BBa_I729004]

From Biobrick

  • BBa_T9002
    • T9002 circuit.jpg

Future Work

  • inverter-aiiA
    • Rec inv aiia.jpg

Senders

New Parts We Made

  • MetK Sender ( could not deposit to registry )

MetK circuit.jpg

From Biobrick

  • Sender(BBa_S03623)

BBa s03623.jpg