Team:TUDelft/13 August 2009

From 2009.igem.org

Lab Notebook

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13 August 2009

Sriram

Today i understood that running the gel with ligated products is unnecessary which is clear in the below gel. I must not do this mistake again. I plated the transformed colonies on the plate.

Calin

Knockout day. NanoBio: Protocol for gene knockout

Made 1M l-arabinose stock. 150mg into 0.85 mL ddH20.

Digested CE with EcoRI (10uL DNA).

Yesterdays gel:

Gel120809-delay-conj.png


Well Part Expected Plasmid Size Status
1
2
3 DNA Ladder
4 E0240 876
5 B0031 14  ?
6 J04630 857
7 R0010 200
8 R0040 54 too small
9 pSB1C3 2072
10 pSB1AK3 3426
11 Assembly 1
12 Assembly 3
13 Assembly 5
14 Assembly 6
15 Assembly 7
16 Assembly 8
17 trbK X+P
18 GFP-gen E+S
19 pTet+RBS E+S  ?
20 DNA Ladder

Made 12 plates. 4 High KAN. 4 Low KAN. 4 TRI.

Placed 50uL of overnight R751 + pKD46 culture into 4 x 5 mL tubes.

In 30C incubator at 11:15

11:45 0.034 OD

12:30 0.065 OD

13:17 0.126 OD

Induced +L-arabinose tubes with L-arabinose (40uL 1M stock added to 4mL). Control tube has no L-arabinose added.

In 30C incubator at 13:25

14:40 0.497 OD

on Ice at 14:57

centrifuge 1 @ 15:13 - 10 min 4000 rcf 3C

centrifuge 2 @ 15:44 - 10 min 4000 rcf 3C

centrifuge 3 @ 16:10 - 10 min 4000 rcf 3C

12 plates made, of which 8 are various controls

Plate ID Knockout Variables AB
1H oriTR_KO +L-arabinose +PCR 1xKAN
1L oriTR_KO +L-arabinose +PCR 0.5xKAN
2 oriTR_KO +L-arabinose -PCR TRI
3H oriTR_KO -L-arabinose +PCR 1xKAN
3L oriTR_KO -L-arabinose +PCR 0.5xKAN
4 oriTR_KO -L-arabinose -PCR TRI
5H trbK_KO +L-arabinose +PCR 1xKAN
5L trbK_KO +L-arabinose +PCR 0.5xKAN
6 trbK_KO +L-arabinose -PCR TRI
7H trbK_KO -L-arabinose +PCR 1xKAN
7L trbK_KO -L-arabinose +PCR 0.5xKAN
8 trbK_KO -L-arabinose -PCR TRI

Tim Vos helped with electroporation step. Electroporator was set to 600 ohm.

Incubator Time Knockout Variables Time Constant
18:42 oriTR_KO +L-arabinose +PCR 12.0
18:45 oriTR_KO +L-arabinose -PCR 13.3
18:48 oriTR_KO -L-arabinose +PCR 10.4
18:50 oriTR_KO -L-arabinose -PCR 13.4
18:54 trbK_KO +L-arabinose +PCR 12.0
18:56 trbK_KO +L-arabinose -PCR 12.9
17:02 trbK_KO -L-arabinose +PCR 13.0
17:05 trbK_KO -L-arabinose -PCR 12.6

After one hour 200 uL was plated. oriTR_KO +L-ara +PCR and trbK_KO +L-ara +PCR placed in fridge at 18:30.

Made 5mL tube cultures for assemblies CB and CC.

Todays 8 well gel to check the linear fragments for the knockout:

Gel130809TimandCalin.png
Well Part Expected Plasmid Size Status
2 CE 2157
3 oriTR_KO_PCR 1596
4 trbK_KO_PCR 1596
5 DNA Ladder
6  ?  ?

Daniel

Yesterday´s gel confirm the sizes of all the biobricks needed (see the wells 4-10 in the first gel of this site), I did a second round of digestions though, in order to have enough DNA. After a new gel and check sizes, I did the assemblies 1A and 2A (see locks and keys section). Also, I transformed by heat shock and electroporation these assemblies and did plates and culture tubes with respective antibiotic.