Chiba/Communication

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< Chiba
Revision as of 22:26, 26 October 2007 by Maiko (Talk | contribs)

Chiba logo.png

Introduction | Project Design ( 1.Sticky Hands | 2.Communication | 3.Size Control ) | Making Marimos | Our Goal || Team Members | メンバ連絡簿


Communication Unit

Our Aim

Fig1. 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

Fig2. 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!!

Making Recievers

New Parts We Made

  • ver.1([http://partsregistry.org/Part:BBa_I729006 BBa_T729006])
    • BBa I729006 circuit.jpg
  • ver2.([http://partsregistry.org/Part:BBa_I729005 BBa_I729005])
    • BBa I729005 circuit.jpg

From Biobrick

  • ver.0(BBa_T9002)
    • T9002 circuit.jpg

Future Work

  • ver3
    • Rec inv aiia.jpg

Making Senders

New Parts We Made

  • MetK Sender

MetK circuit.jpg

From Biobrick

  • Sender(BBa_S03623)

BBa s03623.jpg

Future Work

  • Light Sensing Sender (Light -> AHL)

Light sensing sender.jpg

futureでLuxIもスイッチできた方が魅力的だと思うんだ。∵ReceiverにSenderを混ぜるのではなく,初めからReceiverとSenderを混ぜた状態で凝集させることができる。ex.)Photoswitch etc... by tashiro