From 2009.igem.org

Revision as of 16:23, 18 October 2009

Plan

Aim: Create bacteria that produce a noxious odour when induced to do so

Methods:

1. Clone the yqiT gene from Bacillus subtilis into a biobrick vector.
   
2. Make constructs that express this gene constitutively and under the control of an inducible promoter.
   

6/5

Constructs to be created:

1. yqiT
   
2. ptetR-RBS-yqiT-dterm
   
3. pAraC-RBS-yqiT-dterm
   
4. pLacI-RBS-yqiT-dterm
   

Obtaining DNA:

Resuspended DNA in the following wells with 10ul water:

Plate 1 1D
[http://partsregistry.org/wiki/index.php/Part:BBa_R0080 AraC regulated promoter]

Plate 1 12E
[http://partsregistry.org/wiki/index.php?title=Part:BBa_R0010 LacI regulated promoter]

Plate 1 1H
[http://partsregistry.org/wiki/index.php/Part:BBa_B0030 Strong RBS]

Plate 1 13B
[http://partsregistry.org/wiki/index.php?title=Part:BBa_J13002 TetR repressed POPS generator]

Plate 2 24C
[http://partsregistry.org/wiki/index.php?title=Part:BBa_B0014 Double terminator]

Transformed 1ul of each of the above into DH5a competent cells:

Transformation

• Mix 1ul of DNA with 100ul of competent cells on ice.
• Leave on ice for 30 minutes.
• Heat shock at 42°Cfor 45 seconds.
• Leave on ice for 2 minutes.
• Add 500ul of LB and incubate at 37°C for 1 hour.
• Plate on LB-ampicillin plates.

6/6

No colonies grew from the 5 transformations of 6/5.

6/7

Creating a biobrick part out of yqiT

Strategy: PCR out the yqiT gene from the Bacillus subtilis genome using primers to attach the biobrick preffix/suffix and clone this into a biobrick vector. The vector utilized is the GFP generator which houses a sufficient-sized insert:

Plate 1 16E (from 2007 iGEM distribution provided by Chiba University)
[http://partsregistry.org/wiki/index.php?title=Part:BBa_E0840 GFP generator]

Overview:

1. PCR yqiT gene from genome
2. purify DNA from the PCR product
3. digest GFP generator and purified PCR product by XbaI/PstI
4. gel-purify the digested vector (GFP generator without the insert i.e. empty) and the yqiT gene
5. ligate the above 2 fragments of DNA together
6. transform into E. coli and select for ampicillin resistance
7. check for transformation success using colony PCR by yqiT primers

PCR of yqiT gene
The Bacillus subtilis genome was provided by Bacillus subtilis 168

The following primers were used to amplify an approx. 1500bp fragment from the Bacillus subtilis genome.

yqiT EX: ccggaattctctagaatggaactttttaaatatatggaacgatacg(bold text is a sequence binding yqiT gene)
yqiT SP: ctgcagcggccgctactagtattagcgacgacttaaaatatgttgg(bold text is a sequence binding yqiT gene)

PCR protocol
The following was mixed in a PCR tube:
1ul 20uM yqiT EX primer
1ul 20uM yqiT SP primer
2ul 10X Pfu Ultra buffer
1.6ul dNTP mix
0.15ul Bacillus subtilis genome
0.5ul Pfu Ultra enzyme
13.85ul MilliQ

Performed PCR using the following program:

1. 95°C 2 minutes
2. 95°C 30 seconds
3. 50°C 30 seconds
4. 72°C 40 seconds
5. Repeat 2-4 23 times
6. 25°C forever

Purified PCR product using the Promega PCR purification kit.

Ran on gel to visualize bands:

PCR unsuccessful: will digest the GFP generator but cannot perform the ligation without the PCR product.

Digestion
Digested purified PCR product and the GFP generator both with XbaI/PstI:

yqiT
3ul PCR product
1ul High buffer
0.5ul XbaI
0.5ul PstI
5ul MilliQ

GFP generator
6ul DNA
2ul High buffer
1ul XbaI
1ul PstI
10ul MilliQ

Incubated mixtures at 37°C for 1 hour.

Ran on gel to gel purify:
Lanes 1, 12:marker
Lanes 2, 5, 9:GFP
Lanes 3, 6, 10:yqiT

Cut out the second band from the bottom and dissolved the gel using the Promega gel purification kit to extract DNA from.

This DNA is stored for later usage as the GFP generator X/P vector fragment.

6/14

Creating a biobrick part out of yqiT

Strategy: PCR out the yqiT gene from the Bacillus subtilis genome using primers to attach the biobrick preffix/suffix and clone this into a biobrick vector. The vector utilized is the GFP generator which houses a sufficient-sized insert:

Plate 1 1D (from 2009 iGEM distribution provided by Tokyo University) promoter (lacI regulated)

Overview:

PCR yqiT gene from genome

gel-purify DNA from the PCR product

digest lacI regulated promoter and purified PCR product by XbaI/PstI

gel-purify the digested vector (lacI regulated promoter without the insert i.e. empty) and the yqiT gene

ligate the above 2 fragments of DNA together

transform into E. coli and select for ampicillin resistance

check for transformation success using colony PCR by yqiT primers

PCR of yqiT gene The Bacillus subtilis genome was provided by Bacillus subtilis 168

The following primers were used to amplify an approx. 1095bp fragment from the Bacillus subtilis genome.

yqiT EX: ccggaattctctagaatggaactttttaaatatatggaacgatacg(bold text is a sequence binding yqiT gene)

yqiT SP: ctgcagcggccgctactagtattagcgacgacttaaaatatgttgg(bold text is a sequence binding yqiT gene)

PCR protocol

The following was mixed in a PCR tube:

1ul 20uM yqiT EX primer

1ul 20uM yqiT SP primer

2ul 10X Pfu Ultra buffer

1.6ul dNTP mix

0.15ul Bacillus subtilis genome

0.5ul Pfu Ultra enzyme

13.75ul MilliQ

Performed PCR using the following program:

1. 95°C 2 minutes

2. 95°C 30 seconds

3. 50°C 30 seconds

4. 72°C 40 seconds

5. Repeat 2-4 29 times

6. 25°C forever

Purified PCR product using the Promega PCR purification kit.

Ran on gel to gel purify:

Lanes 1:marker 6ul

Lanes 2:yqiT PCR product 10ul + 10xLoading Dye 2ul

PCR successful

Ligation

Ligated gel purified yqiT and vector with TaKaRa Solutions 1:

lacI regulated promoter (vector) 2ul

yqiT 8ul

TaKaRa Solutions 1 6ul

Incubated mixtures at 37°C for 10 minutes.

Transformation

6/21

Creating a biobrick part out of yqiT

Strategy: PCR out the yqiT gene from the Bacillus subtilis genome using primers to attach the biobrick preffix/suffix and clone this into a biobrick vector. The vector utilized is the GFP generator which houses a sufficient-sized insert:

Plate 1 1D (from 2009 iGEM distribution provided by Tokyo University)
[http://partsregistry.org/wiki/index.php?title=Part:BBa_R0010 promoter (lacI regulated)]

Overview:

1. PCR yqiT gene from genome
2. gel-purify DNA from the PCR product
3. digest lacI regulated promoter and purified PCR product by XbaI/PstI
4. gel-purify the digested vector (lacI regulated promoter without the insert i.e. empty) and the yqiT gene
5. ligate the above 2 fragments of DNA together
6. transform into E. coli and select for ampicillin resistance
7. check for transformation success using colony PCR by yqiT primers

PCR of yqiT gene
The Bacillus subtilis genome was provided by Bacillus subtilis 168

The following primers were used to amplify an approx. 1095bp fragment from the Bacillus subtilis genome.

yqiT EX: ccggaattctctagaatggaactttttaaatatatggaacgatacg(bold text is a sequence binding yqiT gene)
yqiT SP: ctgcagcggccgctactagtattagcgacgacttaaaatatgttgg(bold text is a sequence binding yqiT gene)

PCR protocol
The following was mixed in a PCR tube:
1ul 20uM yqiT EX primer
1ul 20uM yqiT SP primer
2ul 10X Pfu Ultra buffer
1.6ul dNTP mix
0.15ul Bacillus subtilis genome
0.5ul Pfu Ultra enzyme
13.75ul MilliQ

Performed PCR using the following program:

1. 95°C 2 minutes
2. 95°C 30 seconds
3. 50°C 30 seconds
4. 72°C 40 seconds
5. Repeat 2-4 29 times
6. 25°C forever

Purified PCR product using the Promega PCR purification kit.

Ran on gel to gel purify:
Lanes 6:marker 6ul
Lanes 2, 4:yqiT PCR product 10ul + 10xLoading Dye 2ul

PCR successful

Digestion
Digested purified PCR product and the lacI regulated promoter both with XbaI/PstI:

yqiT
3ul PCR product
1ul High buffer
0.5ul XbaI
0.5ul PstI
5ul MilliQ

lacI regulated promoter
4ul DNA
4ul High buffer
2ul XbaI
2ul PstI
28ul MilliQ

Incubated mixtures at 37°C for 1 hour.

Ran on gel to gel purify:
Lanes 3:marker 6ul
Lanes 2, 5:lacI regulated promoter 40ul + 10xLoading Dye 8ul
Lanes 1, 4:yqiT 10ul + 10xLoading Dye 2ul

Cut out the band and dissolved the gel using the Promega gel purification kit to extract DNA from.

Ligation
Ligated gel purified yqiT and vector with TaKaRa Solutions 1:

lacI regulated promoter (vector) 0.5ul
yqiT 5.5ul
TaKaRa Solutions 1 4ul

Incubated mixtures at 37°C for 10 minutes.

Transformation

7/5

TA cloning of YqiT
PCR of YqiT
0.25ul Takara ExTaq
5ul 10xExTaq Buffer
4ul dNTPmix
0.5ul Bacillus subtilis genome
0.5ul 5'primer(It is the same sequence as that on 6/21)
0.5ul 3'primer(It is the same sequence as that on 6/21)
up to 50ul MilliQ

Performed PCR using the following program: 1. 94°C 2 minutes
2. 94°C 30 seconds
3. 52°C 80 seconds
4. 72°C 60 seconds
5. Repeat 2-4 29 times
6. 25°C forever

lane1:marker
lane2~5:YqiT

PCR successful!
But we couldn't do ligation because TA cloning kit was not left.
We purified PCR products and put them in -20°C.

7/19

YqiT colony PCR

put a small amount of single colony into each tube with 5ul MilliQ water
￬
95°C 5min
￬
PCR reaction
1ul 10×buffer
0.8ul 2.5mMdNTP
0.08ul Ex-Taq
0.1ul 5’-primer
0.1ul 3’-primer
2.92ul MilliQ water
￬
added the PCR reaction to each tube.
￬
Performed PCR using the following program:
1. 95°C 2min
2. 95°C 30sec
3. 52°C 30sec
4. 72.5°C 80sec
5. repeat 2-4 29times
6. 25°C forever

PCR successful!

added a small amount of colony number 2 and 3 to each test tube with 4ml LB broth.
cultured them over night.

7/20

Miniprep of E.coli cells containing YqiT gene with Promega, Wizard Plus SV Miniprep DNA Purification System

7/27

sequencing YqiT by BIG DYE
1.8ul 5xB.D.3.1.buffer
0.4ul B.D.3.1.
6.3ul MilliQ water
1ul plasmid(0.15ug/ul)
0.5ul 5'or3'primer(3.2pmol/ul)
￬
PCR　Program
1.96°C 2min
2.96°C 10sec
3.55°C 5sec
4.60°C 3min
5.go to 2.29times
6.25°C forever
￬
add 0.5ul PHOSPHATASE ALKALINE shrimp
￬
37°C 1hr incubate
￬
add 1ul 3MNaOAc
￬
add 25ul EtOH
￬
20000xg 4°C 10min centrifugation
￬
put off supernatant
￬
dry tubes
￬
add 15ul HiDi
￬
put them in the sequence machine

7/30~8/2

sequence YqiT by BigDye
unsuccessful

8/3

sequence YqiT by BigDye
successful

8/7~9

Digestion
insert YqiT gene into a terminator of iGEM parts
terminator
double terminator Miniprep., using Promega kit
plate1 23L

8/12~14

PCR of YqiT for restriction enzyme fragmentation and infusion
PCR protocol
The following was mixed in a PCR tube:
0.2ul 100uM yqiT EX primer/yqiT infusion 5'primer
0.2ul 100uM yqiT SP primer/yqiT infusion 3'primer
2ul 10X Pfu Ultra buffer
1.6ul dNTP mix
0.2ul plasmid containing YqiT gene(that sequence matches YqiT gene of Batillus genome)
0.5ul Pfu Ultra enzyme
15.3ul MilliQ

Performed PCR using the following program:

1. 95°C 2 minutes
2. 95°C 30 seconds
3. 55°C 30 seconds
4. 72.5°C 30 seconds
5. Repeat 2-4 29 times
6. 25°C forever

restriction enzyme fragmentation of double terminator by XbaI
1ug plasmid
10ul BSA
10ul 10xM buffer
2.5ul XbaI
up to　100ul MilliQ water
37°C over night
　 restriction enzyme fragmentation of double terminator by EcoRI
1ug plasmid
10ul 10xH buffer
2.5ul EcoRI
up to　100ul MilliQ water
37°C over night
　 restriction enzyme fragmentation of YqiT gene by SpeI
1ug DNA
10ul 10xH buffer
2.5ul SpeI
up to　100ul MilliQ water
37°C over night
　 restriction enzyme fragmentation of YqiT gene by EcoRI
1ug DNA
10ul 10xH buffer
2.5ul EcoRI
up to　100ul MilliQ water
37°C over night
　

8/15,16

ligate YqiT and double terminator

August

Aim
We decided to use YqiT as a reporter of dioxin!
So, we began to create this construct
1.-XRE-Gal1 promoter-yqiT-
2.-Ahr-←Gal1promoter/Gal10 promoter→-Arnt-

• PCR of yqiT and insert it in iGEM parts(plate 1-7D:Gal1 promoter)
  

Performed PCR using the following program:
1. 95°C 2 minutes
2. 95°C 30 seconds
3. 55°C 30 seconds
4. 72.5°C 30 seconds
5. Repeat 2-4 29 times
6. 25°C forever

• cut YqiT off with EcoRI and SpeI
  
• cut P1-7D off with EcoRI and XbaI
  
• ligate the upper two DNA
  

September

• read the sequence of Gal1 promoter+yqiT
  

→the result conforms with NCBI datebase

• insert XRE in P1-7D including yqiT using infusion kit(clonthech)
  

Aim
TA cloning of Ahr, Arnt and gal1/10 promoter

• PCR of Ahr and Arnt for TA cloning(Ex-taq , Funakoshi)
  

template:human Ahr cDNA and human Arnt cDNA
1,95°C 2min
2,95°C 30sec
3,55°C 30sec
4,72.5°C 1.5min
5,go°C to 2, 29times
6,25°C forever

==October='em

• PCR of gal1/10 promoter (Ex-taq , Funakoshi)
  

template:S.serevisiae genome DNA
1,95°C 2min
2,95°C 30sec
3,55°C 30sec
4,72.5°C1min
5,go°C to 2, 29times
6,25°C forever

• TA cloning of Ahr, Arnt and gal1/10 promoter
  

ligate PCR product and T bector
￬
put each plasmid into different E.coli
￬
Miniprep of them by using Promega kit
￬
read each sequence in order to check whether there is plasmids including Ahr, Arnt or gal1/10 promoter

Aim

• check YqiT expression
  

Using iGEM parts, create the construct that produces YqiT steadily or reguratory
P2-10F-YqiT-double terminator
P2-16E-YqiT-double terminator
P1-22A-YqiT-double terminator
P1-21B-YqiT-double terminator

cut YqiT-double terminator off with XbaI and PstI
cut P2-10F, P2-16E, P1-22A and P1-21B off with SpeI and PstI
￬
ligate YqiT-double terminator and iGEM part
￬
put each plasmid into different E.coli
￬
Miniprep of them by using Promega kit
￬
read each sequence in order to check whether there is plasmids including the construct

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