10/09/15
- Cas-tone- H3 inserts into MV12 (MV11-GFP)
Cas-tone Project
- STAGE 1 - pcDNA-dCas9-VP64 vector re-design
- DONE - Knock-out VP64 from C-terminus - replace AscI-VP64:HA:STOP-EcoRI-XbaI with AscI-HA:STOP-XbaI dsOligo
- DONE - Knock-out FLAG from N-terminus - replace SpeI-CMV:3xFLAG:NLS-SacII with PCR-amplified (SpeI)/XbaI-CMV-SpeI-NotI-SacII; use reverse primer to add SacII
- STAGE 2 - Histone parts
- DONE - Order primers (annotated in Benchling)
- DONE PCR-amplify histone parts as XbaI-Kozak-histone part-a-NotI. Note: Do no use Kozak BioBrick, since this will add extra amino acids onto conserved histone N-terminal tail. Instead, use the Kozak-like seq. from the Addgene plasmid, +3 extra Kozak bases (included in primer)
- STAGE 3 - Cas-fusion
- Insert Kozak-histone parts (X/N) into dCas9 plasmid "MV12" (S/N)
- STAGE 4 - gRNA
- Put pre-existing gRNA (from luc experiment) into pSPgRNA
Assemblies
- H3-1-40_MV11: H3-1-40/(X/N)/129 + MV12/(S/N)/9506
- H3-1-60_MV11: H3-1-60/(X/N)/189 + "
- H3-1-80_MV11: H3-1-80/(X/N)/250 + "
- H3-1-116_MV11: H3-1-116/(X/N)/373 + "
- H3-1-136_MV11: H3-1-136/(X/N)/433 + "
- Digest of vector (Fermentas FD)
Reagent
|
Volume
|
|
DNA (plasmid) |
15.0
|
10x buffer |
3.0
|
SpeI |
1.0
|
NotI |
1.0
|
dH2O |
10.0
|
|
30 μL --> 37°C/ ~15 min.
|
- Gel purification
- Sigma GenElute kit. Elute & back elute w/ 25 μL elution sln.
- DpnI digest & clean-up of PCR products
- Add 1 μL DpnI to each PCR rxn. Incubate @ 37°C/ 5 min.
- Use the Qiagen Qiaquick PCR Purification kit (cat. no. 28104 ) to purify DNA.
- Elute & back-elute with 30 μL of elution solution.
- Measure [DNA] for vector and inserts
Sample |
OD260 |
260/280 |
ng/μL
|
1. MV11 (S/N) |
0.03 |
1.879 |
13.5
|
2. H3-1-40 PCR |
0.03 |
1.879 |
29.8
|
3. H3-1-60 PCR |
0.04 |
1.974 |
39.7
|
4. H3-1-80 PCR |
0.047 |
1.865 |
46.8
|
5. H3-1-116 PCR |
0.06 |
1.887 |
59.57
|
6. H3-1-136 PCR |
0.062 |
1.932 |
62.0
|
Reagent
|
Volume
|
DNA (500 ng) |
up to 15.0 μL
|
10X FD buffer |
2.0
|
FD EcoRI |
1.0
|
FD XbaI |
1.0
|
Roche SAP |
1.0
|
dH2O |
x μL
|
|
20.0
|
Thermal cycler: LabNet OptiMax "AnOlig shrt"
- 37°C, 10 min
- 95°C, 5 min
- Ramp down to 25°C, 5°C/1 min. [90/1 min, 85/1 min, 80/1 min, ... 25°C/1 min]
- 25°C, ∞
- Final concentration = 25 ng/μL.
- Ligations
- > 2:1 ratio calculations...
- 433 bp largest insert / 9506 bp vector * 2 * 50 ng vector = 4.5 ng
- 129 bp smallest insert / 9506 bp vector * 2 * 50 ng vector = 1.4 ng
Reagent
|
Rxn1-5
|
Rxn6
|
Insert DNA |
0.5 |
---
|
Vector DNA |
3.5 |
3.5
|
2x lgn buf (Roche) |
5.0 |
5.0
|
T4 ligase (NEB) |
1.0 |
1.0
|
dH2O |
--- |
0.5
|
|
10.0 μL |
10.0 μL
|
RESULTS (5/22/15)
- Success! Ligation plates have 15-20 colonies, neg. ctrl has 1 colony
- Pick 2 colonies from each plate for 5 mL cultures and streaks
|