Chiba
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[[Image:chiba_logo.png|center]] | [[Image:chiba_logo.png|center]] | ||
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| - | [[Chiba/Introduction|Introduction]] | [[Chiba/Project_Design|Project Design]] ( [[Chiba/Engeneering_Flagella|1.Affinity Tag]] | [[Chiba/Communication|2.Communication Module]] | [[Chiba/Quorum_Sensing|3.Size Control]] ) | [[Chiba/Making Marimo|Making Marimos]] | [[Chiba/Goal|Our Goal]]<br> | + | [[Chiba|Home]]<br> |
| + | <span style="font-size:120%;font-weight:bold;">[[Chiba/Introduction|Introduction]] | [[Chiba/Project_Design|Project Design]] ( [[Chiba/Engeneering_Flagella|1.Affinity Tag]] | [[Chiba/Communication|2.Communication Module]] | [[Chiba/Quorum_Sensing|3.Size Control]] ) | [[Chiba/Making Marimo|Making Marimos]] | [[Chiba/Goal|Our Goal]]</span><br> | ||
[[Chiba/Acknowledgements|Acknowledgements]] | [[Chiba/Team_Members|Team Members]] | [http://chem.tf.chiba-u.jp/igem/ iGEM Chiba Website] | [[Chiba/Members_Only|メンバ連絡簿]] | [[Chiba/Acknowledgements|Acknowledgements]] | [[Chiba/Team_Members|Team Members]] | [http://chem.tf.chiba-u.jp/igem/ iGEM Chiba Website] | [[Chiba/Members_Only|メンバ連絡簿]] | ||
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==Project Overview== | ==Project Overview== | ||
[[Image:Chiba_marimobig.jpg|frame|'''photo. 1''' Marimo in the lake]]Our iGEM project is to make a '''Marimo-ish gathering of bacteria'''. Marimo is a green spherical shaped algae (shown in Fig.1), which is a popular living organism in Japan as a National Treasure because of its beautiful shape and its smoothness. | [[Image:Chiba_marimobig.jpg|frame|'''photo. 1''' Marimo in the lake]]Our iGEM project is to make a '''Marimo-ish gathering of bacteria'''. Marimo is a green spherical shaped algae (shown in Fig.1), which is a popular living organism in Japan as a National Treasure because of its beautiful shape and its smoothness. | ||
| - | ===[[Chiba/Introduction|Why We Make a Marimo | + | ===[[Chiba/Introduction|Introduction: Why We Make a Marimo]]=== |
| + | ====Spherical Multicellular Organism!?==== | ||
When you see a shape in Nature, you will notice whether a sphere, which is absolutely symmetric in 3D, is really stable or not in Nature. | When you see a shape in Nature, you will notice whether a sphere, which is absolutely symmetric in 3D, is really stable or not in Nature. | ||
In fact, an oil droplet is a sphere in water. Red blood cell in a hypotonic solution shows its shape change to a spherical balloon. | In fact, an oil droplet is a sphere in water. Red blood cell in a hypotonic solution shows its shape change to a spherical balloon. | ||
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[[Chiba/Introduction|more...]] | [[Chiba/Introduction|more...]] | ||
| - | ===[[Chiba/Project Design|How To Make Our Marimo]]=== | + | ===[[Chiba/Project Design|Project Design: How To Make Our Marimo]]=== |
[[Image:Chiba_marimosystem.png|frame|'''scheme. 1''' Our marimo system.]]What we require to our system is as follows: | [[Image:Chiba_marimosystem.png|frame|'''scheme. 1''' Our marimo system.]]What we require to our system is as follows: | ||
#Affinity Tag. | #Affinity Tag. | ||
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==[[Chiba/Goal|Our Goal]]== | ==[[Chiba/Goal|Our Goal]]== | ||
| - | + | Although we could not reach them, below we describe the goal that we set to make a marimo bacteria. | |
*A test of adsorption between flagella | *A test of adsorption between flagella | ||
*A test to confirm a limit of size | *A test to confirm a limit of size | ||
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[[Chiba/Goal| See Details]] | [[Chiba/Goal| See Details]] | ||
| - | ===[[Chiba/Goal# | + | ===[[Chiba/Goal#In the Long Run|In the Long Run]]=== |
| - | See [[Chiba/Goal# | + | See [[Chiba/Goal#In the Long Run|here]] : our brainstorming of the marimo future! |
[[Chiba/Goal|more...]] | [[Chiba/Goal|more...]] | ||
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| + | ==Sponsers== | ||
| + | <center> | ||
| + | [[Image:Chiba_Knowledge.jpg]] | ||
| + | [[Image:Chiba_yakukensha.gif]] | ||
| + | [[Image:Chiba_Stratagene.gif]] | ||
| + | [[Image:Chiba_Greiner.gif]]<br><br> | ||
| + | [[Image:Chiba-u.gif]] | ||
| + | </center> | ||
Latest revision as of 06:44, 27 October 2007
|
Home |
Project Overview
photo. 1 Marimo in the lake
Introduction: Why We Make a Marimo
Spherical Multicellular Organism!?
When you see a shape in Nature, you will notice whether a sphere, which is absolutely symmetric in 3D, is really stable or not in Nature. In fact, an oil droplet is a sphere in water. Red blood cell in a hypotonic solution shows its shape change to a spherical balloon. However multicellular organisms have their shape different from a sphere except Marimo. Of course, other algae do not show spherical shape, they live on a surface of stone. It is quite intriguing how Marimo remains its spherical shape in a lake!
Our team focuses understanding how such spherical structure can be sustained even when it Is multicellular organisms.
more...
Project Design: How To Make Our Marimo
scheme. 1 Our marimo system.
- Affinity Tag.
- Communication Module.
- Size Control.
Two cells are used in our system: AHL senders and receivers. Senders generates the affinity tags constitutively, while receivers generates them only when they are induced by AHL. The marimo-forming goes like this:
- Make the sender core by sticking with the affinity tag.
- Insert the sender core into the receiver culture.
- The sender core produces AHL, which make the near receivers to generate the affinity tags and GFPs.
- The affinity tagged receiver sticks with the central sender core. This will continue until the AHL cannnot reach the marimo boundary,
- When the AHL reached the marimo boundary, the adsorping stops, which makes a finite-sized marimo bacteria.
Experiments Overview
Making Affinity Tags
scheme. 2 The short peptide with six histidine (“His-Tag”) was inserted into the fliC D3 domain.
- Make the affinity tag by inserting the his-tag into the flagellar fillament.
Sequence confirmed
- Swarm confirmed
- Flagella strained with anti-flagella antibody
- Phenotype confirmed
- Affnity confirmed
Making Communication Module
scheme.3 New parts BBa_I729005.
- Making Receivers
- AHL > GFP generator (constitutive aiiA) : BBa_T729006
- AHL > GFP & aiiA generator : BBa_I729005
- Sensitive AHL > GFP generator : BBa_I729004
inverter-aiiA
- Making Senders
- MetK Sender : Could not deposit to registry
Controlling Size
photo. 2 Improved Receiver.
- Improve Sender
- Overexpressed the metK (the AHL precursur synthesis enzyme) in the hope to increase AHL synthesis. : Turned out not to work
- Improve Receiver
- Inserted 2 mutations in LuxR which is known from the paper to increase activity.
- Localize AHL
- Tested the GFP expression in constitutive aiiA generator receiver : Went too much.
- Tested the GFP expression in AHL-induced aiiA generator receiver : Needed to twist the circuit more.
- AHL-induced inverter aiiA receiver. Not yet assembled.
Making Marimo
- Moving FliC-His generator. : Not yet assembled.
- FliC-his biobrick : Not yet assembled.
Our Goal
Although we could not reach them, below we describe the goal that we set to make a marimo bacteria.
- A test of adsorption between flagella
- A test to confirm a limit of size
- A test to form Marimo
- A test of size control
In the Long Run
See here : our brainstorming of the marimo future!
Sponsers
