Revision as of 01:53, 16 January 2013 by >Noi
Skin Microbiom Project
Library construction
- Purify sheared DNA with 1volume AmPURE beads (50ul) and elute with 50ul EB buffer.
- Note: Lost sample in well A1 (well broken)
- Dr. Zhang suggested to prepare 7 libraries, but keep 3 of them (F1-H1) to be used later and do PCR on 4 samples (B1-E1)
- Estimate concentration by PAGE analysis (to use this amount as the roughly amount of the future experiment by assume that each sample has equal amount of DNA.
File:ZhangLab 2 2013-01-15 12hr 28min purified shearedDNA.jpg
WellID
|
Conc. (ng/ul)
|
Yields in 50ul
|
B1 |
0.26 |
13.21
|
C1 |
1.60 |
79.87
|
D1 |
3.92 |
196.11
|
E1 |
2.57 |
128.49
|
F1 |
4.67 |
233.58
|
G1 |
1.56 |
78.03
|
H1 |
1.80 |
90.23
|
- From the concentration above, the total amount of amlpicons is not as high as 1ug, but in the range ~20-230ng. Taking the average of the total amount of all 7 samples, it would it ~100ng total.
End repair
Total reaction
|
70.00
|
ul
|
DNA |
50.00 |
ul
|
End repair reaction mix |
20.00 |
ul
|
KAPA End repair mix
|
1x rxn
|
8x rxn mix
|
10X End repai buffer |
7.00 |
56.00
|
KAPA End repair enzyme |
5.00 |
40.00
|
H2O |
8.00 |
64.00
|
Total |
20.00 |
160.00
|
- Aliquot to column #9: 22ul
A-tailing
A-tailing reaction mix: Total 30ul/reaction
A-tailing reaction mix
|
1x rxn
|
8x rxn mix
|
KAPA 10X A-tailing buffer |
3.00 |
24.00
|
KAPA A-tailing enzyme |
3.00 |
24.00
|
H2O |
24.00 |
192.00
|
Total |
30.00 |
240.00
|
- Aliquot to column #10: 32ul
Adapter ligation
- Adapter ligation mix: Total 40ul/reaction -> 10ul is adapters
Ligation reaction mix
|
1x rxn
|
8x rxn mix
|
KAPA 5 Ligation buffer |
10.00 |
80.00
|
KAPA DNA ligase |
4.00 |
32.00
|
H2O |
26.00 |
208.00
|
Total |
40.00 |
320.00
|
- Aliquot to column #11: 43ul
Adapter preparation
Assume DNA amount ~100ng, size 400bp
MW dA-tailed products = (400bp*607.4 D/bp +157.9 D) = 243.12kD = 243,118 g/mole
For 100 ng dA-tailed product = 100ng/243118 g/mole = 4.11E-04 nmole * 20:1 = 0.0082 nmole adapters required.
Adapters (ul) = 0.0082nmoles/(20xE3 nmoles/L * 1E-06L/ul) = 0.0082nmoles/(20E-3 nmoles/ul) = 0.411ul
I will prepare total volume of 20uM annealed adapters 10ul
Stoffel buffer |
1.00
|
PE_t_adapter |
2.00
|
PE_b_adapter |
2.00
|
H2O |
5.00
|
- 94C 2min -> 0.2C/sec to 20C -> 4C hold
- Dilute annealed adapter with 1x Stoffel buffer 0.41ul to 9.59ul -> anneal adapterr 4.1ul: 1x Stoffelul 95.9
20uM annealed adapter |
4.10
|
10x Stoffel buffer |
10.00
|
H2O |
85.90
|
- Aliquot to column #12: 13ul