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From 2010.igem.org

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Revision as of 16:57, 23 October 2010

	Sunday	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
Week 1	-	6/28/2010	6/29/2010	6/30/2010	7/1/2010	7/2/2010	-
Week 2	-	-	-	7/7/2010	7/8/2010	7/9/2010	7/10/2010
Week 3	-	7/12/2010	7/13/2010	7/14/2010	-	-	-
Week 4	-	-	-	-	-	-	-
Week 5	7/25/2010	7/26/2010	7/27/2010	7/28/2010	7/29/2010	7/30/2010	7/31/2010

6/28/2010

Pseudomonas putida KT2440 Antibiotic Resistance

• Protocol for starting overnight culture from -80°C freezer
• All protocols can also be found in the Protocols section of the Notebook

6/29/2010

Pseudomonas putida KT2440 Antibiotic Resistance

• Protocol for making frozen stocks

6/29/2010 and 6/30/2010

Pseudomonas putida KT2440 Antibiotic Resistance

• Protocol for P. putida KT2440 antibotic resistance

7/1/2010

Literature Review Napthenic Acids Composition & HPLC Analysis

• Literature Review of the composition of napthenic acids in oil sands

7/2/2010

• Literature Review of HPLC columns for analysis of napthenic acids

Pseudomonas putida KT2440 Antibiotic Resistance

• Results

7/7/2010

Ann

Biobrick Transformation with Alex and Jennifer

• Made CaCl2 solution, and 100 mg/mL amphicilin stock solution according to the media section of the wiki
• Started an overnight culture of DH5alpha according to the heat shock transformation protocol
  • A 12 mL culture was started because we were multiplying the protocol by 4

7/8/2010

Ann

Biobrick Transformation with Marc, Katie and Audra according to the heat shock transformation protocol

• Started culture for biobrick transformation from over night at 2:30
• At 5:00pm the cultures had overgrown to an OD600 of 1.2
  • A a 1:3 dilution of cells was performed and the cells were allowed to go through another doubling period of 20 minutes
• The OD600 was measured again and found to be around 0.500
• the cultures were placed on ice at 5:30 and allowed to chill for 20 minutes
• The washings were performed and the comp cells were resuspended in the residual CaCl2 only
• The OD600 of the comp cells without the glycerol was above 0.3 therefore the comp cells were concentrated enough
• The heat shock was performed for the following biobricks
  • BBa_179015
  • BBa_179005
  • BBa_145001
  • BBa_117008
  • BBa_117002
  • BBa_103006
• The cultures were placed in the 30C shaker to grow up for an hour at 30C at 9:00pm
• The cultures were plated at 10:00pm

7/9/2010

Ann

Biobrick Transformation with Josh, Prae, Charlie according to the miniprep protocol

• After 9 hours of growing at 37C, the plates did not have any colonies on them
• After 22 hours of growth plates that had grown had clear colonies
  • The positive and negative controls grew out accordingly
  • Only BBa_179015 and BBa_179005 had colonies (both from plate 1 and none from plate 2...)
    • BBa_179015 had over 100 colonies
    • BBa_179005 had 2 colonies
• 5 mL overnight cultures were started with 100 mg/mL amp at 8pm from a single colony on each plate

7/10/2010

Ann

Biobrick Transformation with Marcus, Bryce, Kilho, Josh, Charlie, Jeremy

Miniprep

• Made frozen stocks from overnight culture of miniprep
• Performed miniprep on BBa_179015 and BBa_179005
• Measured DNA concentration with the Nanodrop
  • BBa_179015-11 ng/mL
  • BBa_179005-40 ng/mL

Digest

• Ran according to the digest protocol in the protocol section
  • Cut parts with EcoRI and PstI
• Digested at 37C for 30 minutes

Gel

• Ran according to the protocol in the protocol section
• Used 8 well comb instead of 13 well comb so the samples were too dilute too see

7/12/2010

Ann

Biobrick Transformation with Jeremy

Gel

• Reran gel from 7/10/2010
  • Lane 1-Invitrogen 1 kb plus ladder
  • Lane 2-Digested Bba_179005
    • Ran out of undigested Bba_179005
  • Lane 3-Digested Bba_179015
  • Lane 4-Uncut miniprep plasmid Bba_179015

We found that we successfully extracted BBa_179015, T7-GFP, because there were expected bands at 906 and 2079 as faintly seen in the gel picture above. No appeared for biobrick Bba_179005, T7 promoter, so this biobrick will be transformed again.

Biobrick Transformation take 2 with Jeremy

Autoclaved DI water for transformation and autoclaved sterile containers

• to autoclave sterile containers fill with DI water and decant the water before you start the culture in the container

7/13/2010

Biobrick Transformation take 2 with Jeremy, Marcus, Josh, Kevin, Audra, Katie

Ann

Performed according to the electroporation transformation

• Started the culture at 9:05am
• Removed the culture at 12:05pm with an OD600 of 0.809
• The OD600 of the comp cells were 1.2 after washing
• The time constant for all electroporation were between 5.6 and 5.8 for the following biobricks
  • Bba_K117008
  • Bba_K117008 #2 (from resuspending remaining part left in registry in 15 uL of ultra pure water)
  • Bba_K117002
  • Bba_K145001
  • Bba_K103006
  • Bba_I719005
• The cultures were allowed to grow in the incubator from 2:15-4:00pm
  • The cultures started to clump after growing this time
• 100 uL of cells were plated on 100 mg/mL AMP plates

7/14/2010

Biobrick Transformation take 2

Ann

Electroporation Transformation

All of the transformation plates grew out! (minus the negative control of course)

This means we should do all transformations by electroporation from now on. Just check with the Lin Lab to make sure we can use the electroporation machine for a few hours before starting

Miniprep

• Started overnight cultures in 5 mL of LB plus 100 mg/mL AMP
  • The following biobricks were started from the transformation plate
    • Bba_K117008
    • Bba_K117002
    • Bba_K145001
    • Bba_K103006
    • Bba_I719005
  • The following biobricks were started from the frozen stock in the -80C freezer
    • BBa_K719015

INPNC Biobrick part

• We received the INPNC biobrick (Bba_K265008) from UC Davis 2009 team. THANK YOU!!!
• It was shipped on LB plates in a pMA-SK plasmid from Mr. Gene in E. coli DH5alpha
• Since this plasmid has AMP antibiotic resistance I am pouring plates today with Marc and Kevin with 100 mg/mL AMP resistance to streak out the culture tomorrow with Josh

7/25/2010

Biobrick Transformation of suface display and pBAD

Ann

Tonight I started an 8mL culture of E. coli DH5alpha in LB broth and place in the 30C shaker to grow out overnight

7/26/2010

Biobrick Transformation of suface display and pBAD

Ann

Electroporation transformation

Started larger culture for comp cell preparation in 40mL of LB in a 500 mL sterile container at 9:00am

At 11:30am the OD of the culture was 0.730 and the cultures were placed on ice

The transformation of the biobricks was performed for according to the electroporation transformation protocol listed under the protocol section

The biobricks removed from the registry are as follows

• E0040 (GFP)
• K157013 (linker)
• I0500 (pBAD)

The miniprep of I79015 was used as a positive control and a negitive control was also run

The OD600 of the comp cells were not measured

All of the time constants for the transformation were above 5

the GFP, linker parts and the positive and negitive control were plated on 100 mg/mL AMP plates. The pBAD part and negitive control were plated on 50 mg/mL KAN

7/27/2010

Biobrick Transformation of suface display and pBAD

Transformation Results

The GFP and linker transformation worked and many colonies grew out on the 100 mg/mL AMP plates

The pBAD part did not grow out on the KAN plates. Upon further inspection this plasmid needs to be grown with IPTG to switch the origin of replication to a high copy above 100 copies per cell. Otherwise, another orgin of replication dominates that is less than 10 copies per cell and the antibiotic concentration of 50 mg/mL maybe too high. This transformation will have to be tried again

Miniprep of surface display

At 9:00am a 5 mL culture of the newly transformed GFP part, the newly transformed linker part, the ompA part transformed previously and the INP from the UC davis team were started for a miniprep in LB with 100 mg/mL AMP.

The modified miniprep protocol was used listed on the protocol section of the wiki to get a higher DNA concentration

At 9:00pm the GFP, linker and INP parts were miniprepped. The ompA culture had not grown out (b/c not enough -80C freezer stock was added) and a new culture was restarted at 11:00pm in 5 mL of LB with 100 mg/mL AMP.

Pouring Plates

More LB with 100 mg/mL AMP plates and LB with 25 mg/mL KAN plates were poured

7/28/2010

OmpA Miniprep

The OmpA culture grew out and was miniprepped according the the modified miniprep protocol at 11:30am

Nanodrop of surface display parts

The minipreped cultures from yesterday were nanodropped to determine the DNA concentration according to the protocol in the protocol section of the wiki

• GFP: 47.8 ng/uL
• linker: 33.2 ng/uL
• INP: 41.8 ng/uL
• OmpA: 49.3 ng/uL

Digest of surface display parts

The following biobricks were digested according to the protocol on the wiki with the enzymes listed below

• GFP 1: XbaI and PstI
• GFP 2: EcoRI and XbaI
• INP 1: EcoRI and SpeI
• INP 2: SpeI and PstI
• Linker 1: XbaI and PstI
• Linker 2: SpeI and PstI
• OmpA 1: EcoRI and SpeI
• OmpA 2: SpeI and PstI

Gel of Digest for surface display parts

A gel was run of the above digest with uncut plasmid as a control

• Lane 1: invitrogen 1 kb plus ladder
• Lane 2: GFP cut with XbaI and PstI (GFP: 720 bp Backbone: 2079 bp)
• Lane 3: GFP cut with EcoRI and XbaI
• Lane 4: uncut GFP plamid
• Lane 5:INP cut with EcoRI and SpeI (INP: 924 bp backbone: 2550 bp)
• Lane 6:INP cut with SpeI and PstI
• Lane 7:uncut INP plasmid
• Lane 8:Linker cut with XbaI and SpeI (Linker: 45 bp backbone: 2428 bp)
• Lane 9:Linker cut with SpeI and PstI
• Lane 10: uncut Linker plasmid
• Lane 11: OmpA cut with EcoRI and SpeI (OmpA: 464 bp backbone: 2079 bp)
• Lane 12: OmpA cut with SpeI and PstI
• Lane 13:uncut OmpA plasmid

7/29/2010

Biofilm Assay in LB media

Started cultures of E. coli K12, P. putida (oilsands) and P. fluorescens (oilsands) in 2 mL of LB and grew in the 30C shaker overnight

7/30/2010

Biofilm Assay in LB media

Today we carried out the following biofilm assay protocol

• @ 8:10am the cultures were started from the overnight
• @ 10:00am the OD600 of each culture was measured to be
  • E. coli K12: 0.8
  • P. fluorescens: 1.2
  • P. putida: 1.0
    • These cultures were overgrown but still used for the experiment

The results of this experiment are presented in the chart below

There is a large error in the P. putida strain because there was the largest variation in the OD 600 of the liquid culture which also resulted in a large variation in the CV OD 600 reading

We need to find a reference to compare our biofilms to. This could be either a strain that does not form biofilms or a strain that forms biofilms very well

Transformation of pBAD

Marcus and Alex tried the transformation of pBAD again according to the electroporation protocol with Ann's Notes

The recovery after electroporation was performed in 1 mL of LB with 1mM of IPTG added in order to have the pBAD part have a high copy number

30 uL of 1M IPTG solution was added to a 25 mg/mL KAN plate and spread with sterile beads in order to keep the high copy plasmid in the pBAD part while plating

7/30/2010

Transformation of pBAD

The transformation was successful and there were about 30 colonies on the plate. One colony was picked at 7:30 pm for a miniprep the next day and added to 5mL of LB + 25 mg/mL KAN + 1 mM IPTG and grown out in the 30C shaker

Another culture was started of GFP from the -80C freezer stock in 5 mL of LB + 100 mg/mL AMP for a miniprep. Both the ligations with GFP did not work, so as long as we are miniprepping and digesting we want to re-verify this part