Brandon:LabNotes/Project1/2015-3-23

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Guanidine HCl after transposition, taq2X and IVT on beads, 100 cell samples



  • when searching "guanidine hcl and ampure beads"
  • "Use of SPRI instead of spin filter for tagmentation cleanup. To decrease manual intervention, a magnetic bead‐based method for purifying the tagmentation reactions was implemented. In order to dissociate the tagmentase enzyme from the DNA, guanidine HCl is added to a net concentration of 4 M. Two sequential additions of AMPure bead reagent are effective at purifying the DNA from the rest of the tagmentation reaction components, as shown in Figure 3." http://www.perkinelmer.com/pdfs/downloads/GDE_Nextura_JANUS_NGS_EXpress.pdf
    • This method has already been validated on an automated system, and should work for us.
    • They also perform 2 step beads purification, and that will be tried too.
Add .8X uL beads to sample
Inucubate for 10 minutes
Incubate on magnet for 5 minutes
remove supernatent
Add 1.8X uL beads (1.8X the original volume)
Proceed with incubation, magnet and EtOH washing


Before starting protocols

1. Check if have enough reagents etc for the protocol

  • lysis buffer
  • sc1 transposomes
  • custom 3' transpson
  • IVT reagents
  • cells etc
  • 5X, 2X taq polymerase
  • Zymo DNA clean and concentrator


  • 2. Samples
samples
Transposase is undiluted. 1X concentrated
1. t7-top2, 5X tn5-059, 100 cells rep1
2. t7-top2, 5X tn5-059, 100 cells rep2
3. t7-top2, 5X tn5-059, 1000 cells
4. t7-top2, 5X tn5-059, NTC
5. t7-top2, 5X tn5-059, 6 ng pure DNA



IVT Protocol

  • If need to make more transposome, do first 2 steps. If not goto step 3.

Generation of sc1-T7iBR-IdxXX transposomes

1. annealing of ME sequence to T7 transposon sequence

    • a. Make 100 uM stock solution of sc1-T7iBR-IdxXX and sc1-T7tspn-NoP-bot.
    • b. Incubate 2.5 uL of each oligo (100uM) with 20 uL EB buffer at 95C for 1 minutes. Oligo's now at 10 uM in 25 uL.
    • c. cool to RT at 0.1 C/s


2. transposome complex generation, run controls!!!

  • add the below components into one tube and incubate for 20 minutes at RT
1. Add 0.5 uL of 100% sterile glycerol to tube
2. Add 0.5 uL of annealed transposon to the 100% sterile glycerol and mix well
4. Add 1.0 uL of DILUTED Ez-TN5 transposase to well.
  • store at -20, is good for a year


3. Prepare samples, lyse cells with lysis buffer

CELL WASHING - (wash cells with PBS)

  • 1. count cells, spin down all cells at 250-500 g for 5 minutes
  • 2. wash with 1X PBS, centrifuge 250-500 g for 5 minutes, resuspend to XX cells/uL
  • 3. Count cells again, aliquot cells to sample tubes

CELL LYSIS

  • 1. dilute Lysis Buffer (LB) to 2X, or as needed (from 10X stock)
  • 3. add LB to cell aliquots, mix briefly (mineral oil optional)
  • 4. transposition ready


LYSIS BUFFER NOTES

  • Lysis buffer is: 10ml 10X lysis buffer (LB, 100mM Tris.Hcl pH 7.5, 100mM NaCl, 30mM MgCl2, 1% NP40, Crawford et al. PNAS 2003) in nuclease free H2O.


4. transposition reaction Add all components and incubate at 37C FOR 30 MINUTES

1.0 uL 5X Custom Tagmentation buffer
2.0 uL lysed cells/pure genomic DNA
1.0 uL T7 transposomes (MAKE SURE TO ADD LAST) (5X diluted)
1.0 uL N-H2O
___________
5.0 uL total solution


5. Bring to 15 uL with N-H2O. Add 15 uL 8M guanidine HCl for a total of 30 uL.

    • If using beads next add 1.8X (54 uL) beads per sample


ELUTE IN 9.6 or 12 uL DEPENDING, leave beads in solution


6. Fill in reaction

  • Add 2.4 uL of 5X taq polymerase or 3.0 uL of taq2X. Run at 72C for 3 minutes. (same as nextera)


8. Maxiscript (Ambion) T7 Protocol, IVT

  • DNA from PCR can be used directly in the MAXIscript Kit without any pretreatment or purification.
a. Thaw 10X Transcription Buffer and ribonucleotide solutions. Store the ribonucleotides (A, C, G, U) 
   on ice, but keep 10X transcription buffer at room temp

b. Assemble reaction mixture at room temperature, ADD IN ORDER AND MIX THOROUGHLY!!!!
  bring to 10 uL with Nuclease free water
  X   uL   DNA template (list 1 ug)
  2   uL   10X Transcription Buffer
  1   uL   10 mM ATP
  1   uL   10 mM CTP
  1   uL   10 mM GTP
  1   uL   10 mM UTP
  2   uL   T7 Enzyme Mix


b. Incubate reactions at 37C overnight for ~16 hours. (>10 uM limiting nucleotide)



9. Clean with Zymo clean and concentrator

  • elute samples in 10 uL of N-H2O
  • quanitate with Qubit or on TBU gel.



AFTER IVT RNA HAS ALREADY BEEN GENERATED AND CLEANED WITH ZYMO


Results

  • total RNA. Used 1200 intensity for 2.5 ng ladder band since its intensity was a littler higher then the 5 ng band. should be +/- 10 ng then.
' intensity ng/ul
2244.490067 5
1200 2.5
1. t7-top2, 5X tn5-059, 100 cells rep1 10083.3803 23.76248153
2. t7-top2, 5X tn5-059, 100 cells rep2 9901.370295 23.32683831
3. t7-top2, 5X tn5-059, 1000 cells 47608.67142 113.5797338
4. t7-top2, 5X tn5-059, NTC 2298.250068 5.128675234
5. t7-top2, 5X tn5-059, 6 ng pure DNA 165223.0349 395.0911795
  • TBU gel after IVT, Guanidine HCl to remove proteins

File:ZhangLab 2 2015-03-24 14hr 42min-labeled.jpg File:ZhangLab 2 2015-03-24 14hr 44min-invert-labeled.jpg


conclusions

  • looks like it gave a decent amount of RNA. maybe try RNA processsing on it and look at seqnecing libraries? then can use on john changs cells.