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Protocol

Medium for drosophila

[http://www.biol.se.tmu.ac.jp/fly/www/standard-medium.html Medium for drosophila]

Materials	Methods
water : 500 mL dry yeast : 20 g corn flour : 45 g glucose : 50 g agarose : 3.5~5 g propionic acid : 1.5 mL 10 % p-hydroxybenzoate in 70 % Eternol : 5 g	Stir dry yeast and agarose with about two-thirds of water. Then, autoclave it. Stir corn flour and glucose with the remaining water. Stir 1 and 2, then autoclave it again. after autoclave, add propionic acid and 10 % p-hydroxybenzoate in 70 % Eternol into it.■

M9 medium

Materials	Methods
water : 1 L Na2HPO4: 6 g KH2PO4 : 3 g NaCl : 0.5 g NH4Cl : 1 g 100 mM MgSO4 : 10 ml 20 % glucose : 10 mL 10 mM CaCl2 : 10 ml 100 mM thiamine-HCl : 10 ml 20 % casamino acid : 10 ml	Stir Na2HPO4, KH2PO4, NaCl and NH4Cl with water. After autoclave, add 10 ml filter sterilized 100 mM MgSO4, 20 % glucose, 10 mM CaCl2, 100 mM thiamine-HCl. If you need, add 10 ml filter sterilized 20 % casamino acid.

LB medium

Materials	Methods
water : 1 L Tryptone: 10 g Yeast extract : 5 g NaCl : 10 g Agar : 15g	Stir Tryptone, Yeast extract and NaCl with water. If you make LB plates, add agar. Autoclave.

SOB medium

Materials	Methods
water : 100 mL Tryptone: 2 g Yeast extract : 0.5 g 5 M NaCl : 200 ul 3 M KCl : 84 ul 1 M MgSO4 : 1 ml 1 M MgCl2 : 1 ml	Stir Tryptone and Yeast extract with water. Add 200 ul 5 M NaCl and 84 ul 3 M KCl. After autoclave, add 1 ml filter sterilized 10 mM MgSO4 and 10 mM MgCl2.

SOC medium

Materials	Methods
SOB : 100 ml 2 M glucose: 1 ml	Add 2 M glucose to 100 ml SOB.

Buffer TB

Materials	Methods
water : 200 ml PIPES : 3 g CaCl2・2H2O : 0.22 g 3 M KCl : 8.315 ml KOH MnCl2・4H2O : 1.09 g	Stir PIPES and CaCl2・2H2O with 100 ml water. Add 8.315 ml 3 M KCl. Add KOH and adjust pH 6.8. Add MnCl2・4H2O. Add water up to 200 ml. Filter sterilize

DNS reaegnt

Materials	Methods
4.5% NaOH : 30 ml 1% DNS : 88 ml Rochelle salt : 25.5 g 10% NaOH : 2.2 ml Phenol : 1 g Water : 7.8 ml NaHCO3 : 0.69 g	Add 1% DNS 88ml and Rochelle salt 25.5 g to 4.5% NaOH 30 ml (A solution) Add Phenol 1 g and water 7.8 ml to 10% NaOH 2.2 ml (B solution) Add NaHCO3 6.9g to B solution 6.9 ml Add A solution 118ml to B solution 6.9 ml Leave 2 days Store in brown bottle

以下昨年度のコピペのため一部変更必要

Standard PCR

1. Dilute template DNA. If the concentration of DNA is 2-100ng/µL, transfer 1µL to a clean tube and add 99µL MilliQ.
2. Dilute Primer. If the concentration of Primer is XµM, dilute primer X timers and transfer 1µL to a clean tube and add 99µL MilliQ.
3. Mix the following.
   1. For use of KOD plus ver2:

      25mM MgSO4</dt>

      3µL </dd>

      2mM dNTPs</dt>

      5µL </dd>

      10xBuffer for KOD plus ver.2</dt>

      5µL </dd>

      Template DNA (5ng/µL)</dt>

      5µL </dd>

      Primer Forward (10µM)</dt>

      1.5µL </dd>

      Primer Reverse (10µM)</dt>

      1.5µL </dd>

      KOD plus ver.2</dt>

      1µL </dd>

      MilliQ</dt>

      28µL </dd>

      Total</dt>

      50µL </dd>

   2. For use of KOD FX:

      2mM dNTPs</dt>

      10µL </dd>

      2xBuffer for KOD FX</dt>

      25µL </dd>

      Template DNA</dt>

      5µL </dd>

      Primer Forward (10µM)</dt>

      1.5µL </dd>

      Primer Reverse (10µM)</dt>

      1.5µL </dd>

      KOD FX</dt>

      1µL </dd>

      MilliQ</dt>

      6µL </dd>

      Total</dt>

      50µL </dd>

4. (If amplification is not succeeded, try at 4.5 or 6.0µL 25mM MgSO4.)
5. Let stand for 2min at 94℃.
6. 25-40 cycles for 10s at 98℃, for 30s at Tm-5℃, and for 1min (1min for 1kb) at 68℃ (Tm is temparature at which primer will dissolve).
7. At 15℃ forever.
8. Agarose Gel Electrophoresis for confirmation.

Screening PCR

1. Mix the following (Do on PCR Bench).

   10x PCR buffer (TAKARA)</dt>

   40µL </dd>

   2.5mM dNTP</dt>

   8µL </dd>

   Primer-1 (10pmol/µL)</dt>

   8µL </dd>

   Primer-2 (10pmol/µL)</dt>

   8µL </dd>

   Ex Taq HS (TAKARA)</dt>

   1.6µL </dd>

   MilliQ </dt>

   334µL (to total 400µL) </dd>

2. Dispense 25µL to 15 tubes.
3. Pick a single colony and transfer it to each tubes.
4. Suspend the colony.
5. Let stand for 10min at 90℃.
6. 35 cycles for 30s at 94℃, for 30s 55℃, and for 1min at 72℃.
7. Let stand for 4min at 72℃.
8. Add 5mL Loading Buffer to the tubes.
9. Agalose Gel Electrophoresis for confirmation.
10. Negative Control: Use nothing.
11. Positive Control: Use a colony that will yield a product with this primers.

Mutagenesis (Point mutation, Deletion, Insertion)

1. Mix the following.

   10xBuffer</dt>

   5µL </dd>

   2mM dNTP</dt>

   5µL </dd>

   Primer Forward (10µM)</dt>

   1.5µL </dd>

   Primer Reverse (10µM)</dt>

   1.5µL </dd>

   Template Plasmid (50ng/µL)</dt>

   1µL </dd>

   KOD plus ver.2</dt>

   1µL </dd>

   MilliQ</dt>

   35µL </dd>

   Total</dt>

   50µL </dd>

2. Prepare control: instead of KOD plus ver.2, add 1µL MilliQ.
3. Let stand for 2min at 94℃.
4. X cycles (1 cycle for 1kb) for 10s at 98℃ and for Ymin (1min for 1kb) at 68℃.
5. Hold at 4℃.
6. Take 25µL of the solutions into fresh tubes.
7. Add 1µL DpnI (10U/µL).
8. Let stand for 1h at 37℃.
9. Agarose gel electrophoresis, using 5µL of the solution for confirmation.
10. Mix the following.

    Sample</dt>

    2µL </dd>

    Ligation high</dt>

    5µL </dd>

    T4 Polynucleotide Kinase (5U/µL)</dt>

    1µL </dd>

    MilliQ</dt>

    7µL </dd>

    Total</dt>

    15µL </dd>

11. Let stand for 1h at 16℃.
12. Transformation, using 10µL of the solution.

PCR Purification

1. Use Wizard SV Gel and PCR Clean-Up System by Promega.
2. Combine 1 part sample (PCR product) with one part Membrane Binding Solution (e.g. 50μl sample+ 50μl).
3. Apply the solution to the column, and let stand for 1min.
4. Centrifuge for 1min at 13000rpm. Discard the flow-through.
5. Add 700µl Membrane Wash Solution.
6. Centrifuge for 1min and discard the through.
7. Add 500μl Membrane Wash Solution.
8. Centrifuge for 5min and discard the through.
9. Place the column in a clean tube.
10. Add 60µl MilliQ to the center of each column, let stand for 1min.
11. Centrifuge for 1min at 13000rpm.
12. Discard the column.

Solubilization of Antibiotics

1. Mix the following (Final concentration is 50mg/mL).
   • Ampicillin:

     Ampicillin

     1.0g

     MilliQ

     20mL

   • Kanamycin:

     Kanamycin

     0.5g

     MilliQ

     10mL

2. Dispense 1.1mL of the solution into 1.5mL tubes.
3. Store in the -20℃ freezer.

Transformation

1. Unfreeze conpitent cells on ice.
2. Dry a plate by letting the plate upside down and partly open in incubator.
3. Add 1µL DNA solution and 20µL compitent cells to 1.5mL tube, let stand for 30min on ice. If few colony is observed, increase the amount of the compitent cells or DNA, but make the amount of DNA not to get over that of the compitent cells.
4. Heatshock for 60s at 42℃.
5. Let stand for 2min on ice.
6. Culture for 1h in preculture medium (LB or SOC medium), and plate by using spreader. Do not heat spreader too much because e.coli will dead for heat.

Miniprep

1. Use QIAprep Spin Miniprep Kit Cat. No. 27104 by QIAGEN
2. Pick a single colony from a freshly streaked selective plate and inoculate a culture of about 3mL LB medium containing the appropriate selective antibiotic.
3. Incubate at 170rpm for 8h at 37℃ with vigorous shaking.
4. Transfer a half of the culture to a tube.
5. Harvest the bacterial cells by centrifugation at 14,000g for 1min at 4℃. Remove the medium by decanting.
6. Transfer the half of the culture to same tube and harvest as same. Remove the medium by pippetting.
7. Resuspend pelleted bacterial cells in 250µL Buffer P1 and mix thoroughly by pippeting.
8. Add 250µL Buffer P2 and mix thoroughly by inverting the tube gently 4-6 times.
9. Add 350µL Buffer N3 and mix immediately and thoroughly by inverting the tube 4-6 times.
10. Centrifuge for 10min at 14,000g at 4℃.
11. Apply the supernatants from step 10 to the QIAprep spin column by pipetting.
12. Centrifuge for 10s in a table-top microcentrifuge. Discard the flow-through.
13. Wash the QIAprep spin column by adding 0.5mL Buffer PB and centrifuging for 10s in a table-top microcentrifuge. Discard the flow-through.
14. Wash QIAprep spin column by adding 0.65mL Buffer PeE and centrifuging fo 10s in a table-top microcentrifuge.
15. Discard the flow-through, and centrifuge for and additional 1min to remove residual wash buffer.
16. Place the QIAprep column in a clean tube. To elute DNA, add 50µL water to the center of each QIAprep spin column, let stand for 1min, and centrifuge for 1min.
17. Discard the QIAprep spin column.
18. Measure the concentration of DNA by using eppendorf BioPhotometer plus.
19. Restriction Digestion.
20. Agarose Gel Electrophoresis for Confirmation.

Ethanol Precipitation

1. Use Ethachinmate (NIPPON GENE、312-01791).
2. Add 3.3 µL of 3M Sodium Acetate (attached with Ethachinmate) into 100µL of DNA solution.
3. Add 1µL of Ethachinmate.
4. Vortex.
5. Add ethanol, 200-250µL.
6. Vortex.
7. Centrifuge at 12000xg for 5min.
8. Precipitation.