Sauer:His6 ClpX purification: Difference between revisions
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==Materials Needed== | ==Expression== | ||
===Materials Needed=== | |||
1000x AMP: 100mg/mL in 70% Ethanol | 1000x AMP: 100mg/mL in 70% Ethanol | ||
Line 14: | Line 15: | ||
LB | LB | ||
==Protocol== | ===Protocol=== | ||
==Day One== | ====Day One==== | ||
*1. Innoculate 25mL of LB-AMP with His-tagged ClpX strain. | *1. Innoculate 25mL of LB-AMP with His-tagged ClpX strain. | ||
Line 22: | Line 23: | ||
*2. Warn 2x 1L of TB in incubator or warm room at 37 overnight | *2. Warn 2x 1L of TB in incubator or warm room at 37 overnight | ||
==Day Two== | ====Day Two==== | ||
*1. Add 1mL of 1000x AMP to each of the TB Flasks. | *1. Add 1mL of 1000x AMP to each of the TB Flasks. | ||
Line 42: | Line 43: | ||
==Purification== | ==Purification== | ||
==Materials Needed== | ===Materials Needed=== | ||
Clp Buffer: | Clp Buffer: | ||
Revision as of 09:00, 26 October 2007
Expression
Materials Needed
1000x AMP: 100mg/mL in 70% Ethanol
2 x 1L TB
1M ZnSO4
1M IPTG
His-tagged ClpX strain: SJ01
LB
Protocol
Day One
- 1. Innoculate 25mL of LB-AMP with His-tagged ClpX strain.
- 2. Warn 2x 1L of TB in incubator or warm room at 37 overnight
Day Two
- 1. Add 1mL of 1000x AMP to each of the TB Flasks.
- 2. Innoculate each flask with 10mL of overnight culture
- 3. Grow at 37 C until OD is ~1-1.2 (should take ~>3hrs.)
- 4. Drop temperature of incubator to <RT
- 5. Add 15uL of ZnSO4
- 6. At OD of 1.7-2.0, induce with 0.25mM IPTG (250uL). Make sure flask is cooled to RT)
- 7. After 2-3 hrs. move to bottles and spin down in J6 at 4K/
- 8. Decant Supernatant. Immediately Freeze at -80
Purification
Materials Needed
Clp Buffer:
50mM HEPES-HCl at pH 7.5
200mM KCl
25mM MgCl2
0.1mM EDTA
1mM DTT
10% glycerol