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July 1^st 2012

Moth 0109, 1202 TOPO cloning colony PCR

Results

We did colony PCR for the 5 colony of TOPO cloned samples, but there was no band, which means TOPO cloning has failed for these two genes.

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July 2^nd 2012

fdnG deletion PCP20 curing

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fdnG deletion PCP20 prep, single cut

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July 3^rd 2012

Moth_0109, 1202 PCR

As TOPO cloning of Moth_0109 and 1202 gene failed, we ran one more PCR to prepare for TOPO cloning.

Results

For each of the two genes, correct size of oligonucleotide exists in the PCR product. We noticed that there is an other restriction enzyme site in the Moth 0109, 1202. It means that it’s impossible to reuse TOPO vector. We got other vector which has same pBAD promoter with TOPO cloning. Also we redesigned the primer for Moth 0109, 1202.

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pre-culture of Moth_1197 and 1198 inserted MG1655 cell.

We did pre-culture of vector transformed cell into 3ml LB and incubated on 37℃ for 16 hours.

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July 4^th 2012

Induction of Moth_1197, Moth_1198 gene (sampling) and running SDS-PAGE gel.

We induced Moth_1197 and Moth_1198 gene in pTrcHis2A and pBAD vector with various IPTG and L-arabinose conditions: IPTG 0.5mM, 1mM and Arabinose 10mM, 30mM (0.02% and 0.2%). Temperature conditions are : 37℃, 30℃. Cells were cultured anaerobically in the anaerobic chamber. After 6 hours of induction, we run the sample into SDS-PAGE gel. The gel is stained with coomassie blue for 1 hour and de-stained for overnight.

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July 5^th 2012

fdhF Knockout PCR ( negative and knockout) and PCP20?

Results

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Moth_1197-pBAD/TOPO expression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 28.61 kDa protein, Methyltetrahydrofolate : corrinoid/iron sulfur protein methyltransferase. The band significantly appeared slightly above 42kDa. This means that protein has N and C terminal tag, of which the size is 13kDa and 3kDa each.

28.61kDa + N-term Thioredoxin 13kDa + C-term V5, 6xHis 3kDa = 44.61kDa

Therefore, the product protein locates slightly above 42kDa ladder.

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Moth_1197-pTrcHis2A expression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 28.61 kDa protein, Methyltetrahydrofolate : corrinoid/iron sulfur protein methyltransferase. The band significantly appeared between 24kDa and 35kDa. This means that protein has C terminal tag,

28.61kDa + 2.14kDa = 30.75kDa

The band that does not exist on negative sample is roughly on this size. Therefore, we can say that this protein is also expressed on pTrcHis2A vector. However, we decided to use pBAD/TOPO vector because it has expressed the protein more significantly.

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Moth_1198-pBAD/TOPO expression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 35.08kDa protein acetyl-CoA decarbonylase/synthase complex subunit delta. But the band was not certain on the gel image.

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Moth_1198-pTrcHis2A expression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 35.08kDa protein acetyl-CoA decarbonylase/synthase complex subunit delta. The band of correct size appeared on the soluble fraction of each sample.

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July 6^th 2012

No Special Event!

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July 7^th 2012

No Special Event!

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July 8^th 2012

Moth 0109, 1202 colony PCR for TOPO cloning to TOP10

Results

1202 colony PCR, The size of bands are correct. We succeed Moth 0109, 1202 gene cloning.

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July 9^th 2012

fdoG knockout confirm PCR

Results

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Moth 0109 and Moth 1202 electro transformation into MG1655 cell

Procedure

We did mini-prep to get the vectors which has Moth 0109, 1202 each from TOP10. We did electroporation to MG1655.

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July 10^th 2012

piBR181 vector arrived

piBR181 vector is known to accommodate oligonucleotide over 100kb. This vector was made from commercial pET-28a (+) vectors to accommodate standardized Biobricks parts. The work proceeded by designing a 181 bp long synthetic DNA fragment for efficient construction of an expression vector for monocistronic assembly of genes provided that each contains its own promoter, operator, ribosome-binding site and transcriptional terminator. A 181 bp long ds DNA construct was designed and ligated to pET-28a (+) (5369 bp) at BglII and XhoI restriction sites to generate piBR181 (5301 bp) expression vector replacing original bio-parts. The newly constructed vector contains SpeI-HindIII single cloning restriction site between RBS and TT sites however, BglII and BamHI/XhoI restriction sites are present before promoter and after TT sites for multi-monocistronic operon assembly.

We got this standardized vector and vector map from Professor Jae Kyung, Song and it arrived today.

▶▶Click to download Original document of piBR181 vector

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Moth 0109 transformed cell confirm PCR

Results

There was no band appeared on the gel, which means that we don’t have any colony with Moth 0109 gene.

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Moth 1202 transformed cell confirm PCR

Results

Band size is smaller than Moth 1202. It means we failed to transform Moth 1202 gene in to MG1655.

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July 11^th 2012

No Special Event!

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July 12^th 2012

pre-culture of Moth_1202, 2312 and 2315 inserted MG1655 cell.

We did pre-culture of vector transformed cell into 3ml LB and incubated on 37℃ for 16 hours.

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July 13^th 2012

Induction of Moth_1202, 2312 and 2314 gene (sampling) and running SDS-PAGE gel.

We induced Moth_1202, 2312 and 2314 gene in pTrcHis2A and pBAD vector with various IPTG and L-arabinose conditions: IPTG 0.5mM, 1mM and Arabinose 10mM, 30mM (0.02% and 0.2%). Temperature conditions are : 37℃, 30℃. Cells were cultured anaerobically in the anaerobic chamber. After 6 hours of induction, we run the sample into SDS-PAGE gel. The gel is stained with coomassie blue for 1 hour and de-stained for overnight.

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Moth_0109 transformed cell confirm PCR – second trial

Results

There was no band appeared on the gel, which means that we don’t have any colony with Moth_0109 gene.

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July 14^th 2012

piBR181 vector single cut

piBR181 vector was cut with RE to check the size of this vector.

Results

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Moth_1202-pTrcHis2Aexpression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 81.72kDa protein, bifunctional acetyl-CoA decarbonylase/synthase complex subunit alpha/beta. Although the band appeared slightly between 75kDa and 90kDa, we were not certain that this band is from Moth 1202 gene expression. This band also exists on the negative sample. Therefore, we concluded that expression of 1202 gene on pTrcHis2A vector has failed.

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Moth_2312-pBAD/TOPO expression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 98.60kDa protein formate dehydrogenase subunit alpha. Although the band significantly appeared slightly above 42kDa, this was not the correct size of protein. Therefore, we concluded that expression of 2312 gene on pBAD/TOPO vector has failed.

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Moth_2314-pBAD/TOPO expression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 78.07kDa protein formate dehydrogenase beta subunit. The band was not certain on the gel image. Therefore, we concluded that expression of 2314 gene on pBAD/TOPO vector has failed.

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Moth_2314- pTrcHis2A expression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 78.07kDa protein formate dehydrogenase beta subunit. The band was not certain on the gel image. Therefore, we concluded that expression of 2314 gene on pTrcHis2A vector has failed.

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pre-culture of Moth_1202, 1198 and 0109 inserted MG1655 cell.

We did pre-culture of vector transformed cell into 3ml LB and incubated on 37℃ for 16 hours.

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July 15^th 2012

Induction of Moth_1202, 1198 and 0109 gene (sampling) and running SDS-PAGE gel.

We induced Moth-1202, 1198 and 0109 gene in pTrcHis2A and pBAD vector with various IPTG and L-arabinose conditions: IPTG 0.5mM, 1mM and Arabinose 10mM, 30mM (0.02% and 0.2%). Temperature conditions are : 37℃, 30℃. Cells were cultured anaerobically in the anaerobic chamber. After 6 hours of induction, we run the sample into SDS-PAGE gel. The gel is stained with coomassie blue for 1 hour and de-stained for overnight.

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July 16^th 2012

Moth_1202-pBAD/TOPO expression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 81.72kDa protein, bifunctional acetyl-CoA decarbonylase/synthase complex subunit alpha/beta. Although the band appeared slightly above 75kDa, we were not certain that this band is from Moth 1202 gene expression. We thought that band of size 81.72kDa should be more biased towards 90kDa band. Therefore, we concluded that expression of 1202 gene on pBAD vector has failed.

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Moth_1198-pBAD/TOPO expression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 35.08kDa protein acetyl-CoA decarbonylase/synthase complex subunit delta. The band significantly appeared slightly above 42kDa. This means that protein has N terminal tag, of which the size is 13kDa.

35.08kDa + N-term Thioredoxin 13kDa = 48.08kDa

Therefore, the product protein locates slightly above 42kDa ladder

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Moth_1198-pTrcHis2A expression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 81.72kDa protein, bifunctional acetyl-CoA decarbonylase/synthase complex subunit alpha/beta. Although the band appeared slightly above 75kDa, we were not certain that this band is from Moth 1202 gene expression. We thought that band of size 81.72kDa should be more biased towards 90kDa band. Therefore, we concluded that expression of 1202 gene on pBAD vector has failed.

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Moth_0109-pTrcHis2A expression check (Result)

Results

Discussion

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 59.94kDa protein, formate--tetrahydrofolate ligase. The band is not significant, but appeared slightly above 54kDa marker in the 37℃ sample.

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July 17^th 2012

No Special Event!

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July 18^th 2012

No Special Event!

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July 19^th 2012

No Special Event!

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July 20^th 2012

No Special Event!

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July 21^st 2012

No Special Event!

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July 22^nd 2012

pre-culture of MG 1655 cell transformed with Moth 1202 gene inserted pTrcHis2A and pBAD/mycHisC vector.

We did pre-culture of both pTrcHis2A 1202 and pBAD/mycHisC transformed cell into 5ml LB and incubated on 37℃ for 16 hours.

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July 23^rd 2012

Moth 0109 vector double cut check

Restriction and buffers are mixed in the ratio as shown below.

Results

We checked the size of each broken fragments of vector, and found each bands appear about 1.6kb. After checking correct size of fragment, we sent mini-prepped vectors for sequencing.

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Induction of Moth_1202 gene (sampling) and running SDS-PAGE gel.

Last time we induced the samples in 0.5mM, 1mM IPTG and 10mM arabinose conditions, but there were no significant band on the gel. So we induced Moth_1202 gene in pTrcHis2A and pBAD vector with more larger concentration of IPTG and arabinose conditions: IPTG 2mM, 3mM, 4mM and Arabinose 10mM, 30mM, 40mM. Temperature conditions are : 37℃, 30℃. Cells were cultured anaerobically in the anaerobic chamber. After 6 hours of induction, we run the sample into SDS-PAGE gel. The gel is stained with coomassie blue for 1 hour and de-stained for overnight.

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July 24^th 2012

Expression check of Moth_1202 on pBAD vector (Result)

Results


For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 81.72 kDa protein, acetyl-CoA decarbonylase/synthase complex subunit alpha/beta. The band appeared significantly on the correct size for pTrcHis2A vector lanes.

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July 25^th 2012

Sequencing result of Moth_0109

We analyzed sequencing result from Macrogen using Multialin program.

Results

Cite: "Multiple sequence alignment with hierarchical clustering". F. CORPET, 1988, Nucl. Acids Res., 16 (22), 10881-10890

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July 26^th 2012

Vector mini-prep for all genes except 0109 and FDH.

Results

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colony PCR of Moth_0109 gene

Results

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July 27^th 2012

Primer design for Gibson assembly

Results

According to the Gibson assembly kit from NEB,

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PCR amplification of fragments for Gibson assembly

Results

PCR amplification result was successful except for 1199, 1191 genes; bands appear at the correct size. Correct size for each fragments are as below.

1201 : 1.3 + 0.3 = 1.6kb
1203 :
1204
1197
1198
1199
1191
1516

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July 28^th 2012

pre-culture of pTrcHis2A-Moth0109 vector inserted MG1655 cell.

We did pre-culture of pTrcHis2A 0109 transformed cell into 5ml LB and incubated on 37℃ for 16 hours.

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July 29^th 2012

PCR amplification of pBAD - Moth_1191 & 1199

We amplified target genes using PCR. Total reaction volume was 50uL and the elongation time was about 1kb/min.

Results

second trial of Moth_1199, 1191 amplification

This was the second trial of amplifying Moth 1199 and 1191, but we found no band on the gel. So, we decreased annealing temperature down to 51℃, but this time we also couldn’t find one.

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pre-culture of cell for vector miniprep - Moth_1191 & 1199

As there might be errors in vector miniprep step, we decided to pre-culture the cell once more.

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Induction of Moth_0109 gene (sampling) and running SDS-PAGE gel.

We induced Moth-0109 gene in pTrcHis2A vector with different IPTG conditions and temperature: 0.5mM, 1mM and 37℃, 30℃. And then, we run the sample into SDS-PAGE gel. The gel is stained with coomassie blue for 1 hour and de-stained for overnight.

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July 30^th 2012

Expression optimization of Moth_0109 gene on pTrcHis2A (Result)

For each samples of different induction conditions, we run SDS-PAGE gel and checked the presence of 59.94 kDa protein, formate tetrahydrofolate ligase.

Results

Discussion

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PCR amplification of Moth_1191, 1199 gene (3rd and 4th trial)

We did PCR amplification of Moth_1191 and 1199 gene with original TOPO primer and Gibson primer.

Results

We thought that there might be some problem with vector preparation, so we tried mini-prep once more, and we got no band. Also, we tried colony PCR of 1191 and 1199 gene with Gibson primers, which has failed.

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July 31^st 2012

PCR amplification of Moth_1191, 1199 gene (5th trial)

We did PCR amplification of Moth_1191 and 1199 gene with original TOPO primer and Gibson primer.

Results

We can see that only the samples with TOPO primers had the correct size of oligonucleotide. Therefore, there might be some problems with forward primers.

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pre-culture of pBAD/mycHisC-Moth0109 vector inserted MG1655 cell.

We did pre-culture of pBAD/mycHisC 0109 transformed cell into 5ml LB and incubated on 37℃ for 16 hours.

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