Brandon:LabNotes/Project1/2012-5-7

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Adaptation of transposition method for inserting T7

  • in reference to shendure paper transposition
  • also in reference to Athurva's summary
  • new technique of only annealing sequences for form full mosaic ends and adding adaptors.
  • would result in 100% efficiency of capture of sequence upon insertion, including single insertions.

Summary:

5’- [A][TTAATACGACTCACTATAGGG][T][CCTCCCTCGCGCCATCA][G][AGATGTGTATAAGAGACAG] -3’  (T7tspn-top) 
   spcr     T7 forward       spcr   read sequence  spcr         ME 

 
       5’- ATTAATACGACTCACTATAGGGTCCTCCCTCGCGCCATCAGAGATGTGTATAAGAGACAG -3’
                                                3'- TCTACACATATTCTCTGTC [Phos]-5'   (T7tspn-bot)

5'- [phos] CTGTCTCTTATACACATCT -3'
      3’-  GACAGAGAATATGTGTAGAGACTACCGCGCTCCCTCCTGGGATATCACTCAGCATAATTA -5’


Fragments created after transposition:


5’- A[TTAATACGACTCACTATAGGG]TCCTCCCTCGCGCCATCAGAGATGTGTATAAGAGACAG NNNNNN------ CTGTCTCTTATACACATC -3'
                                            3'- CTACACATATTCTCTGTC ------NNNNNN GACAGAGAATATGTGTAGAGACTACCGCGCTCCCTCCT[GGGATATCACTCAGCATAATT]A -5’ 


Upon single insertion, T7 still present in either direction of insertion, IVT off top strand, and bottom:

NNNNN------ CTGTCTCTTATACACATC -3'               5’- ATTAATACGACTCACTATAGGGTCCTCCCTCGCGCCATCAGAGATGTGTATAAGAGACAG NNNNNN
---NNNNNNNN GACAGAGAATATGTGTAGAGACTACCGCGCTCCCTCCTGGGATATCACTCAGCATAATTA -5’               3'- CTACACATATTCTCTGTC ------NNNN


After fill in with T4 DNA polymerase, or BST or w/e

5’- A[TTAATACGACTCACTATAGGG]TCCTCCCTCGCGCCATCAGAGATGTGTATAAGAGACAG NNNNNNNN
3'- T[AATTATGCTGAGTGATATCCC]AGGAGGGAGCGCGGTAGTCTCTACACATATTCTCTGTC ------NNNN


NNNNN------ CTGTCTCTTATACACATCTCTGATGGCGCGAGGGAGGA[CCCTATAGTGAGTCGTATTAA]T -3'
---NNNNNNNN GACAGAGAATATGTGTAGAGACTACCGCGCTCCCTCCT[GGGATATCACTCAGCATAATT]A -5’


  read primers/amplification etc

5’- ATTAATACGACTCACTATAGGGTCCTCCCTCGCGCCATCAGAGATGTGTATAAGAGACAG NNNNNNNNNNNNN CTGTCTCTTATACACATCTCTGATGGAGCGGGCTGGCAAGGCAGACCGATC -3’
                      5'- TCCTCCCTCGCGCCATCAGAGATGTGTATAAGAGACAG -3' (T7tspn-Read1)
                                                                           

Experiments needed to be done for proof of concept/procedures

  • annealing of ME sequence to T7 transposon sequence
    • 1. Make 100 uM stock solution of T7tspn-top and T7tspn-bot.
    • 2. Incubate 10 uL of each oligo (100uM) with 80 uL EB buffer at 95C for 2 minutes. Oligo's now at 10 uM in 100 uL.
    • 3. cool to RT at 0.1 C/s
  • transposome complex generation
    • 1. incubate the below solutions at RT for 20 minutes
2.5 uL of annealed transposon
2.5 uL of 100% sterile glycerol
5.0 uL of Ez-TN5 transposase


(Tn5mC-A1top: 5’- GAT [5mC] TA [5mC] A[5mC] G [5mC] [5mC] T [5mC] [5mC] [5mC] Downloaded from genome.cshlp.org on May 4, 2012 - Published by Cold Spring Harbor Laboratory Press T [5mC] G [5mC] G [5mC] [5mC] AT [5mC] AGA GAT GTG TAT AAG AGA CAG -3’, IDT, annealed to Tn5mC-A1bot: 5’-[Phos]- CTG TCT CTT ATA CAC A -3’, IDT, by incubating 10μl of each oligo at 100μM and 80μl of EB (QIAGen) at 95°C for 2 minutes then cooling to RT at 0.1°C/s) with 2.5μl 100% glycerol and 5μl Ez-Tn5 transposase (Epicentre – Illumina) for 20 minutes at RT.

should now be ready for IVT.

ask rui

left over notes

 Second adapter to anneal:

                                                                    [phos] -5' CTGTCTCTTATACACATCTCTGATGGAGCGGGCTGGCAAGGCAGACCGATC -3’
5’- ATTAATACGACTCACTATAGGGTCCTCCCTCGCGCCATCAGAGATGTGTATAAGAGACAG NNNNNNN------ CTGTCTCTTATACACATC -3'    X   X XXX X XXXX X XX  XX
             XX  XX X XXXX X XXX X   X    3'- CTACACATATTCTCTGTC ------NNNNNNN GACAGAGAATATGTGTAGAGACTACCGCGCTCCCTCCTGGGATATCACTCAGCATAATTA -5’ 
         3'- CTAGCCAGACGGAACGGTCGGGCGAGGTAGTCTCTACACATATTCTCTGTC [phos] -5' 


Strands after fill-in, ligation, separation

top strand
5’- ATTAATACGACTCACTATAGGGTCCTCCCTCGCGCCATCAGAGATGTGTATAAGAGACAG NNNNNNNNNNNNN CTGTCTCTTATACACATCTCTGATGGAGCGGGCTGGCAAGGCAGACCGATC -3’

bottom strand
3'- CTAGCCAGACGGAACGGTCGGGCGAGGTAGTCTCTACACATATTCTCTGTC NNNNNNNNNNNNN GACAGAGAATATGTGTAGAGACTACCGCGCTCCCTCCTGGGATATCACTCAGCATAATTA -5’ 


to stop nonspecific amplification in shendure protocol 
5’-[Phos]- CTGTCTCTTATACACATC -3’ [ddC - 3' to block ends]