Team:Heidelberg/Notebook/Killing II/3rdweek

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Revision as of 15:48, 27 October 2008

3^rd week

go back to 2^nd week

go back to the overview

Monday 08/18/2008

Colicin Receiver

Cloning

Literature research on different E. coli strains to see if they have BtuB receptor. This receptor is necessary for transport through the outer cellmembran in the prey cells. MG1655 and TOP 10 have these receptors. For DH5alpha we found no clear information.

Sender part

pBAD - Cloning

Transformation of pBAD18 into TOP10 cells to amplify the plasmid.
PCR of BBa_F1610 for pBAD18 cloning with pSB_ins Primer:

Tuesday 08/19/2008

Colicin Receiver

Cloning

Controldigestion of BBa_F2621, BBa_F2622, BBa_I15030, BBa_F1610 which received from the registry. See Wednesdaynesday 08/08/13 for protocoll: 1h 45 min
Gel of Digestion:
Results: To weak bands. New gel tomorrow.
Inoculation of pColE9-J LB-liquid culture for maxiprep (250 ml)

Sender part

pBAD-Sender Cloning

Inoculation of BBa_F1610 LB-liquid culture for maxiprep (250 ml)
Inoculation of pBAD18 LB-liquid culture for miniprep (10 ml)

General

Presentation in group seminar of Eils' group

Wednesday 08/20/2008

Colicin Receiver

Cloning

Maxiprep of pColE9-J: CompactPrep Plasmid Mxi Kit 25, Qiagen
Inoculation of liquid culture with pColE1 cells:
- Data of [http://www.dsmz.de/microorganisms/html/plasmids/plasmid.dsm003877.html DSMZ homepage]:
  - Plasmid name: ColE1
  - Other collection No: JC411
  - Marker: E1imm
  - DSMZ-Nr: 3877
  - Molecular Weight: 6.6 kb
  - Host:E. coli JC411
- Remarks: Naturally occurring plasmid; cells with plasmid ColE1 produce immunity proteins rendering the host immune to the lethal effects of the homologous colicin; non-transmissible; unique restriction site for EcoRI; non-conjugative; 10 - 15 copies per cell; amplifiable.
- Medium:

10.0 g Tryptone
 5.0 g Yeast extract
10.0 g NaCl
 1.0 L H₂O
+0.1 % Glucose

- Opening of the glass vial:

Double vial is closed under vacuum.
Heat end of vial in a flame.
Put 2-3 water drops on the spike to let the glass splitt.
Use forceps to remove splitted end.
Take out the inner vial.
Remove the cotton plug and treat the inner side of the vial with flames.
Put 0.5 ml of the media into the vial, and put the cotton plug back. Incubate 30 mins for 37 °C
Stir solution with an inoculation loop an mix with 5 ml medium.
Plate 100 µl of liquid culture on LB agarplate
Incubate liquidculture and agarplate at 37 °C ON

2nd Gel of controldigestion see Tuesdaysday for details:

Sender part

pBAD-Sender Cloning

Miniprep of pBAD18: QIAprep Spin Miniprepkit Kit (250), Qiagen
Maxiprep of BBa_F1610: CompactPrep Plasmid Mxi Kit 25, Qiagen
Cloning strategy of pBAD-Sender:
- Amplification of BBa_F1610 with pSB_ins_fw & pSB_ins_rv
- Use XbaI and PstI site to clone into MCS of pBAD18 plasmid
Digestion of BBa_F1610 and pBAD 18 with PstI and XbaI: Incubation 1.5 h -> 37°C

10.0 µl DNA
 3.0 µl NEBuffer 3
 3.0 µl BSA 10x
 3.0 µl XbaI
 2.0 µl PstI
 9.0 µl H₂O
-------
30.0 µl

Gelextraction of digestion: Upper band of F1610 seems to be once cutted
Ligation with insert:vector ratio 3:1: 1h -> RT, Inactivation: 10 min -> 65 °C

 6.0 µl Insert
 2.0 µl Vector
 2.0 µl 10x T4 DNA Ligase Buffer (Fermentas)
 1.0 µl T4 DNA Ligase (Fermentas)
 9.0 µl H₂O
-------
20.0 µl

Transformation into E. coli TOP 10 cells (Transformation protocoll Chris)
Cloning possibly not works because PstI cuts twice in pBAD18

Thursday 08/21/2008

Colicin Receiver

Cloning

Miniprep of pColE1: Miniprepkit, Qiagen
Inoculation of liquid culture from glycerolstock

Sender part

pBAD-Sender Cloning

Inoculation of liquidcultures from transformation

General

Translation of press release into English
Design of official Wiki

Friday 08/22/2008

Colicin Receiver

Cloning

For Colicin-Receiver-Cloning plans see Internal Team Meeting

Activity Test

For planings see internal team meeting.

Sender part

pBAD-Sender Cloning

Cloning Results are tested via a activity test

Activity Test

ONC was used for a sender activity test. The following graph shows the plate scheme for the test. (S = sender, R = Receiver, 1:5 = Sender:Receiver ratio 1:5 ...)
Cells were incubated and GFP intensity as well as OD were measured every 2 hours. After 2 hours we obtained that we forget to induce LuxI production with arabinose. Because of that 2 µl of a 10% arabinose dilution was putted in every well.

General

Internal Team Meeting:
- Purification of Colicins:
  - Tests on different bacterial strains
  - cells vs cells
  - supernatant vs cells
  - test on eucaryotiv MCF7 and HeLa cells
- Sender Cloning
  - Primer design for LuxI (XbaI and HindIII sites)
  - While primers have not arrived we use XbaI only for cloning.
- Cloning of Colicin-Receivers
  1. Purification of pSB1A3 backbone by digestion of BBa_T9002 with Xba I
  2. Amplification of LuxR Receiver withou GFP from BBa_T9002 with XbaI(fw) and BamHI and SpeI (rv)
  3. Amplification of colicin operons with BamHI and SpeI restriction sites
  4. Digestion og LuxR receiver with XbaI and BamHI and colicin operons with BamHI and SpeI
  5. Ligation of receiver and colicins via BamHI.
  6. Gelextraction of ligated receiver.
  7. Ligation of pSB1A3 luxR-colicin-receiver.

go to 4^th week

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Team:Heidelberg/Notebook/Killing II/3rdweek

From 2008.igem.org

Revision as of 15:48, 27 October 2008

Contents

Monday 08/18/2008

Colicin Receiver

Cloning

Sender part

pBAD - Cloning

Tuesday 08/19/2008

Colicin Receiver

Cloning

Sender part

pBAD-Sender Cloning

General

Wednesday 08/20/2008

Colicin Receiver

Cloning

Sender part

pBAD-Sender Cloning

Thursday 08/21/2008

Colicin Receiver

Cloning

Sender part

pBAD-Sender Cloning

General

Friday 08/22/2008

Colicin Receiver

Cloning

Activity Test

Sender part

pBAD-Sender Cloning

Activity Test

General