Team:Newcastle/Labwork/2 September 2009

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*[[#Sporulation Tuning/Chassis Team|Sporulation Tuning/Chassis Team]] '''- attempted to PCR up the sleB and cwlJ genes from the ''B. subtilis'' genome'''
*[[#Sporulation Tuning/Chassis Team|Sporulation Tuning/Chassis Team]] '''- attempted to PCR up the sleB and cwlJ genes from the ''B. subtilis'' genome'''
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*[[#Stochastic Switch Team|Stochastic Switch Team]] '''- '''
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*[[#Stochastic Switch Team|Stochastic Switch Team]] '''- digested the ''sspb'' PCR product (once cleaned up) with restriction enzymes and also froze down ''E. coli'' cells containing the transformed BioBricks.'''
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==<u>Metal Sensor Team</u>==
==<u>Metal Sensor Team</u>==
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[[Image:Team Newcastle 2009 iGEM 02-09-09 IMG 0683.JPG|200px|thumb|Arun preparing ''Bacillus subtilis'' genomic DNA]]
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===Introduction===
===Introduction===
Before anything else is carried out, the Metal Sensing team will analyse the PCR products from yesterday's PCR reactions by DNA gel electrophoresis - this includes the ''czrA'', ''sac'', ''ara'' and ''sspb'' genes. The results from this will then decide where we go from here.
Before anything else is carried out, the Metal Sensing team will analyse the PCR products from yesterday's PCR reactions by DNA gel electrophoresis - this includes the ''czrA'', ''sac'', ''ara'' and ''sspb'' genes. The results from this will then decide where we go from here.

Latest revision as of 12:10, 20 August 2010


Team Newcastle 2009 iGEM ProbationaryP-Sign.PNG

Formal Lab Session - 2nd September 2009

Team Newcastle 2009 iGEM IMG 0681.JPG


Overview

  • Metal Sensor Team - analysed PCR fragments through DNA gel electrophoresis - sac and sspb successful but others not. Genomic DNA for B. subtilis was prepared for a second attempt at PCR reactions involving ara and czrA


  • Promoter Library Sub-Project - carried out two DNA gel electrophoresis attempts in analysing the 3 variant sets of sigA promoters - both gel photographs show negative results



  • Stochastic Switch Team - digested the sspb PCR product (once cleaned up) with restriction enzymes and also froze down E. coli cells containing the transformed BioBricks.



Metal Sensor Team

Introduction

Before anything else is carried out, the Metal Sensing team will analyse the PCR products from yesterday's PCR reactions by DNA gel electrophoresis - this includes the czrA, sac, ara and sspb genes. The results from this will then decide where we go from here.

If our PCR reactions do not go to plan then today, we will prepare genomic DNA from B.subtilis 168 using the Genomic DNA kit by Sigma-Aldrich as we will need some more to be able to PCR up required genes for all 3 teams potentially.

Practical Outline

These tasks should be carried out by the Metal Sensing team for today:

  1. Analyse the PCR products from yesterday's PCR reaction by DNA gel electrophoresis
  2. If PCR reactions have failed:
    1. Prepare genomic DNA (for Bacillus subtilis) using Sigma-Aldrich's kit
    2. Reattempt PCR reactions


Observations

Team Newcastle 2009 iGEM Geldoc 2009-09-02 12hr 03minmetal sensor.jpg


Here is the gel photograph in which the PCR products were analsyed. The lanes are as follows:

  • Lane 1 = blank
  • Lane 2 = HindIII DNA ladder
  • Lane 3 = czrA PCR product
  • Lane 4 = czrA PCR control
  • Lane 5 = sac PCR product
  • Lane 6 = sac PCR control
  • Lane 7 = ara PCR product
  • Lane 8 = ara PCR control
  • Lane 9 = sspb PCR product
  • Lane 10 = sspb PCR control
  • Lane 11 = HindIII DNA ladder


It can be seen that the only PCR products produced (i.e. PCR reactions that worked) are the sac and sspb coding sequences - the other PCR reactions didn't work.

Procedure

In light of the unsuccessful PCR reaction (attempting to amplify the czrA coding sequence) the Metal Sensing Team will carry out a second PCR attempt. This time it will be done on the prepared genome of B. subtilis

B.subtilis 168 Genomic DNA preparation

We followed the instructions in the kit and got our genomic DNA.

Results from the NanoDrop reading for our 6 preparations: Newcastle 168genomicDNA01-09-09--01.png Newcsatle 2168genomicDNA01-09-09--02.png Newcastle 168genomicDNA01-09-09--03.png Newcastle 168genomicDNA01-09-09--04.png Newcastle 168genomicDNA01-09-09--05.png Newcastle 168genomicDNA01-09-09--06.png

We then stored the genomic DNA in the -20C freezer in the midiprep box.

PCR

We carried out PCR again to amplify czrA and ara genes in the same way as on the 21/08/2009 PCR reaction.


Exp.No.3 PCR experiment plan
No. Water (ul) PCR Mix (ul) Forward Primer (ul) Reverse Primer (ul) Template (ul) Polymerase used (ul) Total Volume (ul)
1 24 15 pMA1 2.5ul pMA2 2.5ul 168 DNA 5ul MolTaq (1ul) 50
2 29 15 pMA1 2.5ul pMA2 2.5ul 0 MolTaq (1ul) 50
3 24 15 araR_forward 2.5ul araR_reverse 2.5ul 168 DNA 5ul MolTaq (1ul) 50
4 29 15 araR_forward 2.5ul araR_reverse 2.5ul 0 MolTaq (1ul) 50

PCR conditions:

1- 95C for 2min
2- 95C for 30sec
3- 50C for 1min 
4- 75C for 2min
    Step 2-3-4 x 30
5- 75C for 5min
6- 4C Pause


Promoter Library Sub-Project

Introduction

Mathew analysing and recording the findings displayed in the gel photographs

In yesterday's session, PCR amplifications for the three types of sigA promoter variants was carried out (i.e. V1, V2 and V3). The amplifications of these three types of promoter variants will give rise to a library of different sigA promoters, hopefully of differing affinities.

In today's session the PCR products will be run on the gel and analysed. If there are signs that the PCR reactions have worked successfully then the PCR products will be purified. If it is apparent that the PCR reactions haven't worked at all then another attempt at PCR shall be made.

Preparing the gel and the DNA gel electrophoresis

After the addition of ethidium bromide the agarose gel was prepared in the normal way

The fragments we are expecting to be seen in the gel are roughly 100bp long therefore a fine gel is needed to capture these PCR products. Instead of making up 0.8% agarose gel, 1.5% agarose gel was made up and melted in the way the protocol dictates.

With the gel now set in the tray 6ul (5ul of PCR product and 1ul of loading buffer) of each PCR product was placed into the wells of the gel. The electrophoresis machine was switched on to 90mv and the process allowed to run for 30 minutes.

The resulting gel photograph can be seen here:

Team Newcastle 2009 iGEM 02-09-09 Geldoc 2009-09-02 11hr 54min.jpg


The samples loaded into the gel were as follows:

DNA gel electrophoresis
  • Lane 1 = blank
  • Lane 2 = HindIII DNA ladder
  • Lane 3 = C0
  • Lane 4 = V1
  • Lane 5 = V2
  • Lane 6 = V3
  • Lane 7 = 1ul of neat V1 (control)
  • Lane 8 = HindIII DNA ladder


At first glance it seems that the PCRs have completely failed but on closer inspection there are little clouds of flourescing material just below the second row of dark bands (caused by the colour bands)in the middle of the lanes. These could well be PCR products; another attempt at gel electrophoresis would clarify this. It is possible that the DNA gel electrophoresis has been left to run too long and additionally the voltage has been set too high. Of course, the white cloudy substance at the bottom of these wells are the primer-dimer complexes.

Second attempt at DNA gel electrophoresis

The result of the gel electrophoresis called for another attempt at running the PCR products on the 1.5% agarose gel. The samples were prepared in the following way:

  • 5ul of the 4 PCR samples (C0, V1, V2, V3) were extracted and to each 1ul loading buffer was added
  • 1ul of neat V1 (the control) was diluted in 8ul water - 1ul of loading buffer was added also
  • 2 x 15ul of HindIII ladder


The voltage was cut down to 60mv and the gel was only allowed to run for 15-20 minutes - this was to ensure that the DNA was not run too fast through the gel. The result of this procedure can be seen below:

Team Newcastle 2009 iGEM Geldoc 2009-09-02 18hr 19min.jpg


The samples displayed are as follows:

  • Lane 1 = blank
  • Lane 2 = 15ul of HindIII DNA ladder
  • Lane 3 = 6ul of C0
  • Lane 4 = 6ul of V1
  • Lane 5 = 6ul of V2
  • Lane 6 = 6ul of V3
  • Lane 7 = 6ul of neat V1
  • Lane 8 = 15ul of HindIII DNA ladder


This is certainly a better gel attempt than the previous one as 'bands' can be seen. However it is not clear whether the approx 100bp is excess template or the real product.

Conclusion: Repeat the PCR dropping the annealing temperature down to 45C and proceed with trying to clean up the products from lanes 3-6


Sporulation Tuning/Chassis Team

The DNA samples involved with the PCR reaction
Hanny preparing PCR reactions involving the genes sleB and cwlJ as James observes

Today we began the lab work on our PCR primers. We attempted to use two pairs of our primers; the ones to amplify the sleB and cwlJ genes from the B. subtilis genome. We prepared the solutions needed, and followed the PCR protocol. We rehydrated our primers, and diluted them accordingly. The TMs were calculated by using 5 degrees lower than the given temperature. We prepared two lots of solutions, one with genomic DNA and one without (our controls). They were loaded into the PCR machine, which ran for around 1 hour 53 minutes.

PCR

We carried out PCR of gene "sleB" and "cwlJ" using primer:

  • sleBForward & sleBReverse
  • cwlJForward & cwlJReverse


PCR conditions:

  • No.1 & 2 : 95C 2min -->[95C 30S --> 53C 30S --> 75C 1min] 30 runs --> 75C 5min --> store at 4C
  • No.3 & 4 : 95C 2min -->[95C 30S --> 55C 30S --> 75C 1min] 30 runs --> 75C 5min --> store at 4C
sleB,cwlJ gene PCR experiment
No. Water (ul) PCR Mix (ul) Forward Primer (ul) Reverse Primer (ul) Template (ul) Polymerase used (ul) Total Volume (ul)
1 24 15 sleBForward 2.5ul sleBReverse 2.5ul B.subtilis DNA 5ul MolTaq (1ul) 50
2 29 15 sleBForward 2.5ul sleBReverse 2.5ul 0 MolTaq (1ul) 50
3 24 15 cwlJForward 2.5ul cwlJReverse 2.5ul B.subtilis DNA 5ul MolTaq (1ul) 50
4 29 15 cwlJForward 2.5ul cwlJReverse 2.5ul 0 MolTaq (1ul) 50


PCR product test

Run PCR product on 0.8% agarose gel

When we ran the products on a gel, we noticed a light blue band, a dark blue band and a yellow band - however these were for all of the solutions, control included. Putting the gel under UV light showed this too. We concluded that something had gone wrong. The stochastic switch team also used a well on the same gel, which worked, so we concluded that the gel was not the likely cause of the error. Therefore something went wrong at either the preparation for the PCR stage, or during the PCR. The gel image can be seen below:

Newcastle Gel Chassis PCR1 02-09-09.jpg


We are going to try this again when we are next in the lab.

Stochastic Switch Team

Summary

Goksel adding digested sspB DNA to the gel - this band will be cut out and cleaned

Today we froze our strains into the TPA collection, by freezing them down in DMSO in the -80 freezers both in the lab as well as duplicates in the stock freezer. Goksel did a digest of the sspb PCR product that was cleaned up yesterday.

Yesterday a PCR was done of CzrA, sacA, ara, and sspb. The products of these were run on a gel, the results of which are shown below. It seemed that there was no PCR product for both the CzrA, and ara, however there is a shadow from all of the wells at around 200bp that could be contamination of PCR product- we are unsure.

Despite inconclusive gel results a PCR product clean up was done on all four reactions. Restriction digests were done on the sac and sspb purified products, which had reasonably clear bands on the gel. These were cut with EcoRI and pstI ready for ligation into the plasmid backbone.

sspB digest and DNA extract

Digested sspB

We digested sspB and run the final 70ul of the mix + 10ul of loading buffer on the gel with large wells. We used the ingredients below to prepare the 70ul of the final solution

Water, 16ul
Buffer, 7ul
sspB PCR product, 41ul
EcoRI, 3ul
SpeI, 3ul

We mixed the solution well and incubated at 37C for an hour.

sspB insert's concentration after gel extraction
sspB cut extracted from gel

We then cut the gel fragment containing our sspB cut with EcoRI and SpeI sites. The DNA of the sspB insert was then extracted from this gel fragment.

Gel fragment was measured as 378 mg and we used 3x378=1134ul of gel soluzable gel and 378ul of isopropanol to extract the DNA.

July
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[http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/6_July_2009&action=edit 6] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/7_July_2009&action=edit 7] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/8_July_2009&action=edit 8] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/9_July_2009&action=edit 9] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/10_July_2009&action=edit 10] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/11_July_2009&action=edit 11] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/12_July_2009&action=edit 12]
[http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/13_July_2009&action=edit 13] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/14_July_2009&action=edit 14] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/15_July_2009&action=edit 15] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/16_July_2009&action=edit 16] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/17_July_2009&action=edit 17] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/18_July_2009&action=edit 18] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/19_July_2009&action=edit 19]
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[http://2009.igem.org/Team:Newcastle/Labwork/27_July_2009 27] [http://2009.igem.org/Team:Newcastle/Labwork/28_July_2009 28] [http://2009.igem.org/Team:Newcastle/Labwork/29_July_2009 29] [http://2009.igem.org/Team:Newcastle/Labwork/30_July_2009 30] [http://2009.igem.org/Team:Newcastle/Labwork/31_July_2009 31]
August
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[http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/3_August_2009&action=edit 3] [http://2009.igem.org/Team:Newcastle/Labwork/4_August_2009 4] [http://2009.igem.org/Team:Newcastle/Labwork/5_August_2009 5] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/6_August_2009&action=edit 6] [http://2009.igem.org/Team:Newcastle/Labwork/7_August_2009 7] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/8_August_2009&action=edit 8] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/9_August_2009&action=edit 9]
[http://2009.igem.org/Team:Newcastle/Labwork/10_August_2009 10] [http://2009.igem.org/Team:Newcastle/Labwork/11_August_2009 11] [http://2009.igem.org/Team:Newcastle/Labwork/12_August_2009 12] [http://2009.igem.org/Team:Newcastle/Labwork/13_August_2009 13] [http://2009.igem.org/Team:Newcastle/Labwork/14_August_2009 14] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/15_August_2009&action=edit 15] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/16_August_2009&action=edit 16]
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[http://2009.igem.org/Team:Newcastle/Labwork/24_August_2009 24] [http://2009.igem.org/Team:Newcastle/Labwork/25_August_2009 25] [http://2009.igem.org/Team:Newcastle/Labwork/26_August_2009 26] [http://2009.igem.org/Team:Newcastle/Labwork/27_August_2009 27] [http://2009.igem.org/Team:Newcastle/Labwork/28_August_2009 28] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/29_August_2009&action=edit 29] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/30_August_2009&action=edit 30]
[http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/31_August_2009&action=edit 31]
September
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[http://2009.igem.org/Team:Newcastle/Labwork/7_September_2009 7] [http://2009.igem.org/Team:Newcastle/Labwork/8_September_2009 8] [http://2009.igem.org/Team:Newcastle/Labwork/9_September_2009 9] [http://2009.igem.org/Team:Newcastle/Labwork/10_September_2009 10] [http://2009.igem.org/Team:Newcastle/Labwork/11_September_2009 11] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/12_September_2009&action=edit 12] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/13_September_2009&action=edit 13]
[http://2009.igem.org/Team:Newcastle/Labwork/14_September_2009 14] [http://2009.igem.org/Team:Newcastle/Labwork/15_September_2009 15] [http://2009.igem.org/Team:Newcastle/Labwork/16_September_2009 16] [http://2009.igem.org/Team:Newcastle/Labwork/17_September_2009 17] [http://2009.igem.org/Team:Newcastle/Labwork/18_September_2009 18] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/19_September_2009&action=edit 19] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/20_September_2009&action=edit 20]
[http://2009.igem.org/Team:Newcastle/Labwork/21_September_2009 21] [http://2009.igem.org/Team:Newcastle/Labwork/22_September_2009 22] [http://2009.igem.org/Team:Newcastle/Labwork/23_September_2009 23] [http://2009.igem.org/Team:Newcastle/Labwork/24_September_2009 24] [http://2009.igem.org/Team:Newcastle/Labwork/25_September_2009 25] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/26_September_2009&action=edit 26] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/27_September_2009&action=edit 27]
[http://2009.igem.org/Team:Newcastle/Labwork/28_September_2009 28] [http://2009.igem.org/Team:Newcastle/Labwork/29_September_2009 29] [http://2009.igem.org/Team:Newcastle/Labwork/30_September_2009 30]
October
MTWTFSS
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[http://2009.igem.org/Team:Newcastle/Labwork/5_October_2009 5] [http://2009.igem.org/Team:Newcastle/Labwork/6_October_2009 6] [http://2009.igem.org/Team:Newcastle/Labwork/7_October_2009 7] [http://2009.igem.org/Team:Newcastle/Labwork/8_October_2009 8] [http://2009.igem.org/Team:Newcastle/Labwork/9_October_2009 9] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/10_October_2009&action=edit 10] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/11_October_2009&action=edit 11]
[http://2009.igem.org/Team:Newcastle/Labwork/12_October_2009 12] [http://2009.igem.org/Team:Newcastle/Labwork/13_October_2009 13] [http://2009.igem.org/Team:Newcastle/Labwork/14_October_2009 14] [http://2009.igem.org/Team:Newcastle/Labwork/15_October_2009 15] [http://2009.igem.org/Team:Newcastle/Labwork/16_October_2009 16] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/17_October_2009&action=edit 17] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/18_October_2009&action=edit 18]
[http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/19_October_2009&action=edit 19] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/20_October_2009&action=edit 20] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/21_October_2009&action=edit 21] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/22_October_2009&action=edit 22] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/23_October_2009&action=edit 23] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/24_October_2009&action=edit 24] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/25_October_2009&action=edit 25]
[http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/26_October_2009&action=edit 26] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/27_October_2009&action=edit 27] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/28_October_2009&action=edit 28] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/29_October_2009&action=edit 29] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/30_October_2009&action=edit 30] [http://2009.igem.org/wiki/index.php?title=Team:Newcastle/Labwork/31_October_2009&action=edit 31]



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