McClean:Western Blot: Difference between revisions
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==Protocol== | ==Protocol== | ||
'''Cell growth and protein extraction''' | '''Cell growth and protein extraction''' | ||
# | # Grow cells to mid-log (~1x107 cells/ml; A600 = 0.7 or klett 80) and collect 1.5 ml cells in 1.5 ml microfuge tube (1 minute, 14000xg). It is important not to grow the cells to a high density as this method will not work well. | ||
# | # Resuspend cells in 100 microliters sample buffer(Bring 4X sample buffer to 1X with BME(final concertration 10%), protease inhibitor, phosphatase inhibitor and water). | ||
# | # Heat at 95 deg C for 5 minutes. | ||
# | # Vortex for 30 seconds. | ||
# | # Centrifuge 14000xg for 5 minutes. | ||
'''Running Gel and | '''Running Gel and Transfer''' | ||
# | # Take Nupage pre-cast gel out, remove the white strip and comb, rinse with water. | ||
# | # With the wells facing inward, place two gels or one gel and a buffer dam against the rubber gasket of the Nupage buffer core, put them into the tank(only fit one way) and tight them with the clamp. | ||
# | # Fill the chamber up with 1X Nupage running buffer and fill the outside with 1X Nupage running buffer to the level that the wire is covered. | ||
# | # Run gel at 200V until dye reaches the bottom of the gel. | ||
# | # In the meantime, prepare the transfer buffer. Bring up to 20% methanol, 1X transfer buffer in water. 500ml transfer buffer: 20X Transfer buffer 25ml, Methanol 100ml and Water 375ml. Keep it in 4 degree. | ||
==Notes== | ==Notes== |
Revision as of 11:01, 30 May 2013
Overview
This is a protocol to perform rapid yeast protein prep for SDS PAGE and Western.
Materials
- Beta- mercaptoethanol
- 4X LDS sample buffer(Invitrogen NP0008)
- Protease inhibitor(Roche catlog number: 11836170001)
- Phosphatase inhibitor(Fisher catlog number: 78420)
- 20X NuPAGE running buffer(Invitrogen NP0001)
- Prestained Protein Ladder(Invitrogen catlog number:10748-010)
- Magic Marker(Invitrogen catlog number:LC5602)
- NuPage pre-cast gel
- PVDF membrane(Invitrogen catlog number:LC2005)
- Methanol
- 20X NuPAGE buffer(Invitrogen NP0006)
- 1M Tris, pH 8.0
- 2.5M NaCl
- Tween 20
- Nonfat dry milk
- Primary and secondary antibody
Stock Solutions
Stock Solution 1
- 4X LDS sample buffer(Invitrogen NP0008)
Stock Solution 2
- 20X NuPAGE running buffer(Invitrogen NP0001)
Stock Solution 3
- 1M Tris, pH 8.0
Stock Solution 4
- 2.5M NaCl
Protocol
Cell growth and protein extraction
- Grow cells to mid-log (~1x107 cells/ml; A600 = 0.7 or klett 80) and collect 1.5 ml cells in 1.5 ml microfuge tube (1 minute, 14000xg). It is important not to grow the cells to a high density as this method will not work well.
- Resuspend cells in 100 microliters sample buffer(Bring 4X sample buffer to 1X with BME(final concertration 10%), protease inhibitor, phosphatase inhibitor and water).
- Heat at 95 deg C for 5 minutes.
- Vortex for 30 seconds.
- Centrifuge 14000xg for 5 minutes.
Running Gel and Transfer
- Take Nupage pre-cast gel out, remove the white strip and comb, rinse with water.
- With the wells facing inward, place two gels or one gel and a buffer dam against the rubber gasket of the Nupage buffer core, put them into the tank(only fit one way) and tight them with the clamp.
- Fill the chamber up with 1X Nupage running buffer and fill the outside with 1X Nupage running buffer to the level that the wire is covered.
- Run gel at 200V until dye reaches the bottom of the gel.
- In the meantime, prepare the transfer buffer. Bring up to 20% methanol, 1X transfer buffer in water. 500ml transfer buffer: 20X Transfer buffer 25ml, Methanol 100ml and Water 375ml. Keep it in 4 degree.
Notes
Please feel free to post comments, questions, or improvements to this protocol. Happy to have your input!
- List troubleshooting tips here.
- You can also link to FAQs/tips provided by other sources such as the manufacturer or other websites.
- Anecdotal observations that might be of use to others can also be posted here.
Please sign your name to your note by adding '''*~~~~''': to the beginning of your tip.
References
Gietz, R.D. and R.A. Woods. (2002) TRANSFORMATION OF YEAST BY THE Liac/SS CARRIER DNA/PEG METHOD. Methods in Enzymology 350: 87-96.
Contact
- Megan N McClean 14:01, 20 July 2011 (EDT)
or instead, discuss this protocol.