Prince:Yeast FASP: Difference between revisions
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===Sample Processing (for samples > 1mg protein)=== | ===Sample Processing (for samples > 1mg protein)=== | ||
* Dilute supernatant with UA buffer to | * Dilute supernatant with UA buffer to 10 ml. Load into Vivaspin 15R 10k filters. Centrifuge at 3000g for 50 minutes | ||
* Wash sample with | * Wash sample with 5 ml of UA buffer and centrifuge for 40 minutes at 3000g '''(twice)''' | ||
* Add 2 ml UA-IAA, mix well, incubate at room temperature in the dark for 20 minutes. Centrifuge at 3000g for 30 minutes | * Add 2 ml UA-IAA, mix well, incubate at room temperature in the dark for 20 minutes. Centrifuge at 3000g for 30 minutes | ||
* Wash with 5 ml UA buffer and centrifuge 3000g 40 minutes '''(twice)''' | * Wash with 5 ml UA buffer and centrifuge 3000g 40 minutes '''(twice)''' | ||
* Wash with 5 ml ABC buffer and centrifuge at 3000g for at least an hour '''(twice)''' | * Wash with 5 ml ABC buffer and centrifuge at 3000g for at least an hour (can take as long as 2.5 hours) '''(twice)''' | ||
* Protein assay on small portion of sample assay if desired | * Protein assay on small portion of sample assay if desired | ||
* Add trypsin (proteomic grade) to the sample in the ratio (1:40) (make sure at least 1 ml of ABC is in the filter during trypsin addition) | * Add trypsin (proteomic grade) to the sample in the ratio (1:40) (make sure at least 1 ml of ABC is in the filter during trypsin addition) | ||
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* Rinse with 1 ml ABC. Centrifuge 30 minutes at 3000g | * Rinse with 1 ml ABC. Centrifuge 30 minutes at 3000g | ||
* The flow through contains the peptides | * The flow through contains the peptides | ||
* Acidify with .1% Formic Acid | * Speedvac to desired volume | ||
* Acidify with .1% Formic Acid immediately prior to mass spec analysis | |||
Latest revision as of 06:16, 13 September 2012
- Template File provides easy calculation of volumes and masses for Solution preparation
Cell Lysis
- Place eppendorf containing yeast cells in boiling water.
- Add 10% boiling SDS to yeast cells 1:1 (v/v) for a 5% total SDS concentration. Incubate at 96°C for 10 minutes
- Add DTT to .1 M concentration
- Sonify samples at 50% amplitude for 1 minute 8 times with a 30 second delay between sonications in 1.5 ml or 2 ml eppendorfs(you may have to divide samples to prevent overflow during sonication)
- Centrifuge samples at 16000g to remove cell lysates
Sample Processing (for samples > 1mg protein)
- Dilute supernatant with UA buffer to 10 ml. Load into Vivaspin 15R 10k filters. Centrifuge at 3000g for 50 minutes
- Wash sample with 5 ml of UA buffer and centrifuge for 40 minutes at 3000g (twice)
- Add 2 ml UA-IAA, mix well, incubate at room temperature in the dark for 20 minutes. Centrifuge at 3000g for 30 minutes
- Wash with 5 ml UA buffer and centrifuge 3000g 40 minutes (twice)
- Wash with 5 ml ABC buffer and centrifuge at 3000g for at least an hour (can take as long as 2.5 hours) (twice)
- Protein assay on small portion of sample assay if desired
- Add trypsin (proteomic grade) to the sample in the ratio (1:40) (make sure at least 1 ml of ABC is in the filter during trypsin addition)
- Pulse sample filters to 1000g
- Incubate sample filters at 37 °C in a rotating incubator for 18 hours
- Clean the collection portion filter tube very well with distilled water. After washing rinse with mass spec water
- Centrifuge at 3000g for 30 minutes
- Rinse with 1 ml ABC. Centrifuge 30 minutes at 3000g
- The flow through contains the peptides
- Speedvac to desired volume
- Acidify with .1% Formic Acid immediately prior to mass spec analysis
