Low Read Experiment II
16S0C4 and 16S0D4 were used.
@Gregg Randolph @Linda van Diepen @Alex Buerkle
This experiment is being repeated due to some errors that occurred during the initial experiment.
Questions:
How can we best accommodate low concentration input DNAs?
Concentrate input DNAs?
Concentrate/normalize low yield products?
Both?
Just put more volume of original DNA in?
In the sequence yield, does input concentration, substrate, or some other factor correlate well with low read counts?
Investigations:
Bench(Question 1):
Experimental Sketch of crossed design:
Pull aliquots of some high read count and low read count samples. (Pending new low read samples).
Quantify all samples not including blanks or mock community.
For previously low yielding samples, repeat at typical template amount, and at 2x, and 4x volume added to the reaction (in column 2,3,4, and 6, 7, 8). 6x8 samples in low yield, 8 in high yield, 8 of mock community, 8 of blank (ISD only). 72 reactions with different templates. See template below for clarification.
Template layout is replicated/duplicated, with different barcodes for duplicates.
1 set of 36 products will not be adjusted for pooling.
1 set of 36 will be adjusted for pooling per qPCR results.
Start Reaction Plate Setup:
Add Ultrapure H2O to the reaction plates in the following pattern:
NOTE: Water in the master mix has been adjusted to a lower amount. The plate set up below will replace the water usually added to the master mix while also showing if a decrease in water and an increase in template will increase PCR yields.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
---|---|---|---|---|---|---|---|---|---|
A | 6ul | 6ul | 4ul |
| 6ul | 6ul | 4ul |
| 6ul |
B | 6ul | 6ul | 4ul |
| 6ul | 6ul | 4ul |
| 6ul |
C | 6ul | 6ul | 4ul |
| 6ul | 6ul | 4ul |
| 6ul |
D | 6ul | 6ul | 4ul |
| 6ul | 6ul | 4ul |
| 6ul |
E | 6ul | 6ul | 4ul |
| 6ul | 6ul | 4ul |
| 6ul |
F | 6ul | 6ul | 4ul |
| 6ul | 6ul | 4ul |
| 6ul |
G | 6ul | 6ul | 4ul |
| 6ul | 6ul | 4ul |
| 6ul |
H | 6ul | 6ul | 4ul |
| 6ul | 6ul | 4ul |
| 6ul |
MasterMix
ul/rxn | Reagent | # of rxns | ul needed |
---|---|---|---|
3 | 5X Kapa HiFi Buffer | 200 | 600 |
0.45 | 10M dNTPs | 200 | 90 |
0.3 | Kapa HiFi HotStart DNA Pol | 200 | 60 |
0.25 | HPLC H2O | 200 | 50 |
1 | ISD | 200 | 200 |
5 | Total Volume | 200 | 1000 |
Add 5 ul to each well of a hard shell, full skirt plate.
Add Templates following the pattern below:
Sample | Status | Plate | Location | Original Plate Name | DNA Quant ng/uL (>10ng/uL will be normalized) |
---|---|---|---|---|---|
| Low Read | PA13 | G6 | AYAYEE_RHIZO_PLATE2 | 4.166 |
| Low Read | PA13 | B9 | AYAYEE_RHIZO_PLATE2 | 9.122 |
| Low Read | PA13 | B2 | AYAYEE_RHIZO_PLATE2 | 3.69 |
| Low Read |
|
| Tube 33 | 29.422 |
| Low Read |
|
| Tube 123 | 42.604 |
| Low Read |
|
| Tube 96 | 2.469 |
| Low Read |
|
| Tube 258 | 12.88 |
| Low Read |
|
| Tube 255 | 34.242 |
| Avg Read | PA2 | F9 | Tube 127 | 8.333 |
| Avg Read | PA1 | A12 | Tube 73 | 32.279 |
| Avg Read | PA12 | G3 | AYAYEE_RHIZO_PLATE1 | 2.885 |
| Avg Read | PA12 | F7 | AYAYEE_RHIZO_PLATE1 | 6.397 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
---|---|---|---|---|---|---|---|---|---|
A pool 2 µL each |
Tube 127 |
PLT2: G6 |
PLT2: G6 |
PLT2: G6 | mock community |
Tube 123 |
Tube 123 |
Tube 123 | blank with ISD only |
B pool 2 µL each |
Tube 73 |
PLT2: B9 |
PLT2: B9 |
PLT2: B9 | mock community |
Tube 96 |
Tube 96 |
Tube 96 | blank with ISD only |
C pool 2 µL each |
PLT1: G3 |
PLT2: B2 |
PLT2: B2 |
PLT2: B2 | mock community |
Tube 258 |
Tube 258 |
Tube 258 | blank with ISD only |
D pool 2 µL each |
PLT1: F7 |
Tube 33 |
Tube 33 |
Tube 33 | mock community |
Tube 255 |
Tube 255 |
Tube 255 | blank with ISD only |
E pool according to yield |
Tube 127 |
PLT2: G6 |
PLT2: G6 |
PLT2: G6 | mock community |
Tube 123 |
Tube 123 |
Tube 123 | blank with ISD only |
F pool according to yield |
Tube 73 |
PLT2: B9 |
PLT2: B9 |
PLT2: B9 | mock community |
Tube 96 |
Tube 96 |
Tube 96 | blank with ISD only |
G pool according to yield |
PLT1: G3 |
PLT2: B2 |
PLT2: B2 |
PLT2: B2 | mock community |
Tube 258 |
Tube 258 |
Tube 258 | blank with ISD only |
H pool according to yield |
PLT1: F7 |
Tube 33 |
Tube 33 |
Tube 33 | mock community |
Tube 255 |
Tube 255 |
Tube 255 | blank with ISD only |
Add 2 ul 1-step primers:
Seal with bubble seals. Vortex briefly. Spin down.
Run on Thermocycler Program GSAF36:
Temp C | Cycles | Time |
---|---|---|
95* | 1X | 3:00* |
98 | 36X | 0:30 |
62 | 36X | 0:30 |
72 | 36X | 0:30 |
72 | 1X | 5:00 |
4 | 1X | 0:00 |
MagBead Cleanup:
Some plates were cleaned up using the Nimbus platform protocol “AxyPrep MagBead PCR1 No MM”
Manually, it was done:
Equilibrate Beads to room Temperature
Add 24 ul of MagBeads to each well and 15 ul of replicate to same well of replicate
Pipette mix up and down 10 times.
Incubate at RT for 5 minutes
Secure plate on magnet plate; incubate at RT for 5 minutes (until wells are clear)
Remove 65 ul from each well; keep tips to left or right depending on the column to avoid bead pellet.
Add 100 ul Fresh 80% EtOH to each well. Incubate 30 seconds. Remove 100 ul from each well
Add 100 ul Fresh 80% EtOH to each well. Incubate 30 seconds. Remove 100 ul from each well
Reaspirate from each well to assure maximum EtOH removal
Allow plate to air dry for 7 minutes.
Remove sample plate from magnet plate.
Add 40 ul TE; pipette mix 10+ times. Incubate 2 minutes at RT.
Place sample plate back on magnet for 5 minutes or until all wells are cleared.
Transfer 40 ul to labeled transparent plate (Plate name_PCR_MIDs)
qPCR all products:
Make 1:1000 dilutions of all samples from the PCR plates by adding 1 ul to 999 ul TE in a deep well plate:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
A |
Tube 127 |
PLT2: G6 |
PLT2: G6 |
PLT2: G6 | mock community |
Tube 123 |
Tube 123 |
Tube 123 | blank with ISD only |
|
| NTC |
B |
Tube 73 |
PLT2: B9 |
PLT2: B9 |
PLT2: B9 | mock community |
Tube 96 |
Tube 96 |
Tube 96 | blank with ISD only |
| 04.0002 pM Std | 0.0002 pM Std |
C |
PLT1: G3 |
PLT2: B2 |
PLT2: B2 |
PLT2: B2 | mock community |
Tube 258 |
Tube 258 |
Tube 258 | blank with ISD only |
| 0.002 pM Std | 0.002 pM Std |
D |
PLT1: F7 |
Tube 33 |
Tube 33 |
Tube 33 | mock community |
Tube 255 |
Tube 255 |
Tube 255 | blank with ISD only |
| 0.02 pM Std | 0.02 pM Std |
E |
Tube 127 |
PLT2: G6 |
PLT2: G6 |
PLT2: G6 | mock community |
Tube 123 |
Tube 123 |
Tube 123 | blank with ISD only |
| 0.2 pM Std | 0.2 pM Std |
F |
Tube 73 |
PLT2: B9 |
PLT2: B9 |
PLT2: B9 | mock community |
Tube 96 |
Tube 96 |
Tube 96 | blank with ISD only |
| 2 pM Std | 2 pM Std |
G |
PLT1: G3 |
PLT2: B2 |
PLT2: B2 |
PLT2: B2 | mock community |
Tube 258 |
Tube 258 |
Tube 258 | blank with ISD only |
| 20 pM Std | 20 pM Std |
H |
PLT1: F7 |
Tube 33 |
Tube 33 |
Tube 33 | mock community |
Tube 255 |
Tube 255 |
Tube 255 | blank with ISD only |
|
|
|
Add 16 ul of Illumina Library Quantification MasterMix to each well:
ul/rxn | Reagent | # of rxns | ul needed |
---|---|---|---|
10 ul | KAPA SYBR FAST qPCR MM (2X) | 100 | 1000 |
2 ul | Primer Premix (10X) | 100 | 200 |
4 ul | Ultra Pure Water | 100 | 400 |
16 ul | Total Volume | 100 | 1600 |
Add 4 ul of template, pool, or standards to each well:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
A |
Tube 127 |
PLT2: G6 |
PLT2: G6 |
PLT2: G6 | mock community |
Tube 123 |
Tube 123 |
Tube 123 | blank with ISD only | NTC | NTC | NTC |
B |
Tube 73 |
PLT2: B9 |
PLT2: B9 |
PLT2: B9 | mock community |
Tube 96 |
Tube 96 |
Tube 96 | blank with ISD only | 0.0002 pM Std | 0.0002 pM Std | 0.0002 pM Std |
C |
PLT1: G3 |
PLT2: B2 |
PLT2: B2 |
PLT2: B2 | mock community |
Tube 258 |
Tube 258 |
Tube 258 | blank with ISD only | 0.002 pM Std | 0.002 pM Std | 0.002 pM Std |
D |
PLT1: F7 |
Tube 33 |
Tube 33 |
Tube 33 | mock community |
Tube 255 |
Tube 255 |
Tube 255 | blank with ISD only | 0.02 pM Std | 0.02 pM Std | 0.02 pM Std |
E |
Tube 127 |
PLT2: G6 |
PLT2: G6 |
PLT2: G6 | mock community |
Tube 123 |
Tube 123 |
Tube 123 | blank with ISD only | 0.2 pM Std | 0.2 pM Std | 0.2 pM Std |
F |
Tube 73 |
PLT2: B9 |
PLT2: B9 |
PLT2: B9 | mock community |
Tube 96 |
Tube 96 |
Tube 96 | blank with ISD only | 2 pM Std | 2 pM Std | 2 pM Std |
G |
PLT1: G3 |
PLT2: B2 |
PLT2: B2 |
PLT2: B2 | mock community |
Tube 258 |
Tube 258 |
Tube 258 | blank with ISD only | 20 pM Std | 20 pM Std | 20 pM Std |
H |
PLT1: F7 |
Tube 33 |
Tube 33 |
Tube 33 | mock community |
Tube 255 |
Tube 255 |
Tube 255 | blank with ISD only |
|
|
|
Results:
Pool all samples:
Blue samples (top half of plate) will be pooled at 1* ul per sample.
Red samples (bottom half) will either just be pooled per qPCR numbers or concentrated via SpeedVac, reconstituted to a higher concentration, and pooled by qPCR results. (Pending method instructions).
“ul for pooling” was calculated by multiplying the lowest molarity (3.15) times the maximum V available (35 ul) to get ~110. This result was then divided by each sample’s molarity to obtain the ul needed for equimolar pooling rounded to one decimal place.
This will need to be done by hand, but if we pursue this I will tweak the Nimbus normalization program to do this. For a NovaSeq run, I would pick a higher minimum molarity. While this pool should be above the NovaSeq minimum molarity needed of 1 nM, being higher than its 3.15 nM minimal constituent, I would prefer a larger margin of safety like 5 nM. For an iSeq run, we dilute down to 50 pM, so it is not an issue.
Well Position | Sample | qPCR result | ul for pooling | Repeated qPCR Result | qPCR Duplicated Run Results 02/09 |
1E | SAG192203_R | 54.32 | 2.0 | 1.58 | 2.04 |
2E | SAG_S30P2R_R_2uL | 54.14 | 2.0 | 1.22 | 1.16 |
3E | SAG_S30P2R_R_4uL | 54.03 | 2.0 | 2.05 | 1.34 |
4E | SAG_S30P2R_R_8uL | 11.34 | 9.7 | 5.70E-01 | 3.61E-01 |
5E | Mock_Comm_R | 65.14 | 1.7 | 2.07 | 1.62 |
6E | SAG192199_R_2uL | 71.08 | 1.5 | 2.09 | 1.25 |
7E | SAG192199_R_4uL | 95.41 | 1.2 | 2.34 | 3.91 |
8E | SAG192199_R_8uL | 80.56 | 1.4 | 2.65 | 6.07 |
9E | Blank_ISD_R | 19.23 | 5.7 | 1.8 | 2.25 |
1F | SAG191508_R | 64.52 | 1.7 | 31.69 | 37.26 |
2F | SAG_S38P1R_R_2uL | 60.01 | 1.8 | 1.51 | 1.56 |
3F | SAG_S38P1R_R_4uL | 56.04 | 2.0 | 6.72 | 5.75 |
4F | SAG_S38P1R_R_8uL | 3.15 | 34.9 | 3.86E-01 | 1.42E-01 |
5F | Mock_Comm_R | 63.52 | 1.7 | 2.51 | 2.11 |
6F | SAG192077_R_2uL | 65.88 | 1.7 | 2.38 | 1.58 |
7F | SAG192077_R_4uL | 84.27 | 1.3 | 2.37 | 3.1 |
8F | SAG192077_R_8uL | 83.59 | 1.3 | 3.03 | 4.24 |
9F | Blank_ISD_R | 13.12 | 8.4 | 7.78E-01 | 9.15E-01 |
1G | SAG_S16P3R_R | 26.49 | 4.2 | 11.34 | 14.1 |
2G | SAG_S15P4R_R_2uL | 53.51 | 2.1 | 14.31 | 16.26 |
3G | SAG_S15P4R_R_4uL | 26.2 | 4.2 | 1.33 | 1.56 |
4G | SAG_S15P4R_R_8uL | 12.91 | 8.5 | 6.56E-01 | 6.53E-01 |
5G | Mock_Comm_R | 79.7 | 1.4 | 1.9 | 2.14 |
6G | SAG190271_R_2uL | 70.2 | 1.6 | 1.59 | 1.75 |
7G | SAG190271_R_4uL | 62.73 | 1.8 | 1.81 | 1.95 |
8G | SAG190271_R_8uL | 59.32 | 1.9 | 6.33E-01 | 2.61 |
9G | Blank_ISD_R | 20.04 | 5.5 | 6.79E-01 | 1.13 |
1H | SAG_S44P2R_R | 19.92 | 5.5 | 2.4 | 4.46 |
2H | SAG190005_R_2uL | 54.03 | 2.0 | 2.89 | 6.26 |
3H | SAG190005_R_4uL | 57.05 | 1.9 | 2.72 | 3.62 |
4H | SAG190005_R_8uL | 60.28 | 1.8 | 4.37 | 3.46 |
5H | Mock_Comm_R | 64.83 | 1.7 | 2.17 | 2.28 |
6H | SAG190238_R_2uL | 68.19 | 1.6 | 76.62 | 62 |
7H | SAG190238_R_4uL | 55.07 | 2.0 | 2.16 | 1.83 |
8H | SAG190238_R_8uL | 41.35 | 2.7 | 2.5 | 3.88 |
9H | Blank_ISD_R | 18.32 | 6.0 | 5.57E-01 | 1.36 |
qPCR blue/red pools:
Make 1:1000 dilutions of blue and red pools by adding 1 ul to 999 ul TE in a 1.5mL tubes.
Run each pool in triplicate.
Add 16 ul of Illumina Library Quantification MasterMix to each well:
ul/rxn | Reagent | # of rxns | ul needed |
---|---|---|---|
10 ul | KAPA SYBR FAST qPCR MM (2X) | 30 | 300 |
2 ul | Primer Premix (10X) | 30 | 60 |
4 ul | Ultra Pure Water | 30 | 120 |
16 ul | Total Volume | 30 | 480 |
Add 4 ul of template, pool, or standards to each well:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
A | LR2_Blue_Pool |
|
|
|
|
|
|
|
| NTC | NTC | NTC |
B | LR2_Blue_Pool |
|
|
|
|
|
|
|
| 0.0002 pM Std | 0.0002 pM Std | 0.0002 pM Std |
C | LR2_Blue_Pool |
|
|
|
|
|
|
|
| 0.002 pM Std | 0.002 pM Std | 0.002 pM Std |
D | LR2_Red_Pool |
|
|
|
|
|
|
|
| 0.02 pM Std | 0.02 pM Std | 0.02 pM Std |
E | LR2_Red_Pool |
|
|
|
|
|
|
|
| 0.2 pM Std | 0.2 pM Std | 0.2 pM Std |
F | LR2_Red_Pool |
|
|
|
|
|
|
|
| 2 pM Std | 2 pM Std | 2 pM Std |
G |
|
|
|
|
|
|
|
|
| 20 pM Std | 20 pM Std | 20 pM Std |
H |
|
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Results:
Average Results:
LR2_Blue_Pool: 53.65 nanomoles
LR2_Red_Pool: 35.33 nanomoles
iSeq Run
Dilute to 1 nM based off qPCR results. qPCR results are in pM, but 1:1000 dilution used. The results are effectively in nM for pool.
Blue Pool
1000/Results = ul of Pool to Add
1000/53.7 = 18.6 uL of Pool to Add
1000- ul of Pool to Add = ul of “10 mM Tris 8.5” to Add
1000- 18.6 = 981.4 uL of 10mM Tris 8.5
Red Pool
1000/Results = ul of Pool to Add
1000/35.3 = 28.3 uL of Pool to Add
1000- ul of Pool to Add = ul of “10 mM Tris 8.5” to Add
1000- 28.3= 971.7 uL of 10mM Tris 8.5
Combine Blue and Red pools in equal parts once pools are at 1nM
Dilute 1 nM full pool to loading concentration of 50 pM:
Add 5 ul 1 nM Pool to 85 ul “10 mM Tris 8.5” and 10 ul 50 pM PhiX
Remove iSeq 100 i1 Flow Cell from refrigerator 5’s crisper drawer and open white foil pack and allow to equilibrate to RT for 10-15 minutes.
Open “iSeq 100 i1 Reagent Cartridge v2”. Turn on iSeq100
Click on “Sequence”. Watch Video. Do what video tells you to do. Follow on screen instructions until run starts.
Results located: Data/SequencingRuns/”folder with applicable date”/Alignment_1/Fastq/*.fastq.gz
Upload data through Globus portal off external drive
Data wrangling(2):
Use R to associate NS2 input concentrations with sample names, read counts, and % ISD reads
Repeat qPCR post calibration:
qPCR MMX
Add 16 ul of Illumina Library Quantification MasterMix to each well:
ul/rxn | Reagent | # of rxns | ul needed |
---|---|---|---|
10 ul | KAPA SYBR FAST qPCR MM (2X) | 100 | 1000 |
2 ul | Primer Premix (10X) | 100 | 200 |
4 ul | Ultra Pure Water | 100 | 400 |
16 ul | Total Volume | 100 | 1600 |
Add 4 ul of template, pool, or standards to each well:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
A |
Tube 127 |
PLT2: G6 |
PLT2: G6 |
PLT2: G6 | mock community |
Tube 123 |
Tube 123 |
Tube 123 | blank with ISD only | NTC | NTC | NTC |
B |
Tube 73 |
PLT2: B9 |
PLT2: B9 |
PLT2: B9 | mock community |
Tube 96 |
Tube 96 |
Tube 96 | blank with ISD only | 0.0002 pM Std | 0.0002 pM Std | 0.0002 pM Std |
C |
PLT1: G3 |
PLT2: B2 |
PLT2: B2 |
PLT2: B2 | mock community |
Tube 258 |
Tube 258 |
Tube 258 | blank with ISD only | 0.002 pM Std | 0.002 pM Std | 0.002 pM Std |
D |
PLT1: F7 |
Tube 33 |
Tube 33 |
Tube 33 | mock community |
Tube 255 |
Tube 255 |
Tube 255 | blank with ISD only | 0.02 pM Std | 0.02 pM Std | 0.02 pM Std |
E |
Tube 127 |
PLT2: G6 |
PLT2: G6 |
PLT2: G6 | mock community |
Tube 123 |
Tube 123 |
Tube 123 | blank with ISD only | 0.2 pM Std | 0.2 pM Std | 0.2 pM Std |
F |
Tube 73 |
PLT2: B9 |
PLT2: B9 |
PLT2: B9 | mock community |
Tube 96 |
Tube 96 |
Tube 96 | blank with ISD only | 2 pM Std | 2 pM Std | 2 pM Std |
G |
PLT1: G3 |
PLT2: B2 |
PLT2: B2 |
PLT2: B2 | mock community |
Tube 258 |
Tube 258 |
Tube 258 | blank with ISD only | 20 pM Std | 20 pM Std | 20 pM Std |
H |
PLT1: F7 |
Tube 33 |
Tube 33 |
Tube 33 | mock community |
Tube 255 |
Tube 255 |
Tube 255 | blank with ISD only |
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Results 02/08/2022:
Results for duplicate qPCR run on 02/09/2022:
Results look the same from the 02/08 run.