Difference between revisions of "Purification of GST-HA-S6K"

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(updated lipofectamine conditions)
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==Protocol==
 
==Protocol==
 
===Transfection of Cells===
 
===Transfection of Cells===
#Split cells into 10 new dishes in DMEM/FBS with '''no antibiotics'''.
+
#Split 293A cells into 10-150 mm dishes in DMEM/FBS with '''no antibiotics'''.
#Transefect with 90-95% confluent
+
#Transfect when cells are 90-95% confluent.
#Combine 240 ug DNA with 1.5 mL OptiMEM, and 600 uL Lipofectamine 2000 with 1.5 mL OptiMEM
+
#Transfer cells to serum **and P/S/G free** media
 +
#Combine 500 ug DNA with 10 mL OptiMEM, and separately 700 uL Lipofectamine 2000 with 10 mL OptiMEM
 
#After 5 minutes, combine the DNA solution with the Lipofectamine solution.
 
#After 5 minutes, combine the DNA solution with the Lipofectamine solution.
#Wait 20 min, then add 3 mL to each plate of cells
+
#Wait 20 min, then add ~2 mL to each plate of cells.
#After ~4h refeed with normal media (containing antibiotics)
+
#After ~4h refeed with normal media (can now contain antibiotics) and incubate overnight.
  
 
===Purification of GST-S6K1===
 
===Purification of GST-S6K1===
 +
#Treat cells for 30min with 100 nM Wortmannin to suppress endogenous S6K phosphorylation
 
#Wash cells with D-PBS -/- twice (10 mL per plate)
 
#Wash cells with D-PBS -/- twice (10 mL per plate)
 
#Add 0.5 mL [[HNTG Buffer]] per plate and scrape
 
#Add 0.5 mL [[HNTG Buffer]] per plate and scrape

Revision as of 18:18, 22 August 2012

Materials

Protocol

Transfection of Cells

  1. Split 293A cells into 10-150 mm dishes in DMEM/FBS with no antibiotics.
  2. Transfect when cells are 90-95% confluent.
  3. Transfer cells to serum **and P/S/G free** media
  4. Combine 500 ug DNA with 10 mL OptiMEM, and separately 700 uL Lipofectamine 2000 with 10 mL OptiMEM
  5. After 5 minutes, combine the DNA solution with the Lipofectamine solution.
  6. Wait 20 min, then add ~2 mL to each plate of cells.
  7. After ~4h refeed with normal media (can now contain antibiotics) and incubate overnight.

Purification of GST-S6K1

  1. Treat cells for 30min with 100 nM Wortmannin to suppress endogenous S6K phosphorylation
  2. Wash cells with D-PBS -/- twice (10 mL per plate)
  3. Add 0.5 mL HNTG Buffer per plate and scrape
  4. Collect scraped cells and incubate end over end in eppendorf tube for 30 min
  5. Centrifuge in eppendorf centrifuge for 10 min at 14 000 RPM
  6. Collect supernatant (save a lysate sample) into a 15 mL Falcon tube
  7. Add 0.5 mL Glutatione-sepharose beads and incubate end over end for 1-2h.