• 云顶集团3118(中国)

    2-step PCR mixture and conditions (Barcoded-head primers for seqs pooling)

    Yin-Tse Huang, Tsu-Chun Hung

    Published: 2022-06-17 DOI: 10.17504/protocols.io.j8nlkky3xl5r/v1
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    Abstract

    PCR mixture and condition (2X SUPERGREEN PCR MASTER MIX)

    Steps

    1.

    Wear glove, clean up the working bench w. 1% bleach

    For 1' PCR head-primers

    2.

    Prepare 1' PCR master mixutre for head-primers ( prepare 1.2X of solutions for pipetting error if needed )

    PCR mixture for head-primers for each reaction

    ABCD
    ComponentVolumeVolume (1.2X)Final conc.
    Forward Primer (10 µM)1.6 μl1.9 μl1 µM
    Reverse Primer (10 µM)1.6 μl1.9 μl1 µM
    2X Supergreen PCR Master Mix7.8 μl9.4 μl-
    ddH204.1 μl4.9 μl-
    Total volume15 μl18 μl-

    Note
    Negative control ALWAYS NEEDED! For example, if you have 5 PCR reactions to run, prepare master mixture for 6 reactions (5 DNA template + 1 negative control).

    3.

    Mix the 1' PCR master mixture gently by pippeting. Quick spin the tube.

    4.

    Transfer 15µL 1' PCR master mixutre in 8-strip PCR tubes.

    5.

    Add 0.6µLDNA template in 8-strip PCR tubes, resulting in a 15.6µL reaction mixture for 1' PCR.

    Negative control contains only 15µL master mixture but not DNA template

    6.

    Mix the reaction mixture gently by tapping the tubes. Quick spin the tubes.

    7.

    Carry out PCR using the following condition:

    1' PCR condition for head-primers

    ABCD
    StepTempSecCycle
    Initial denaturation95 ºC30-180 (a)
    Denaturation98 ºC1520-25 cycles
    Annealing64-68 ºC varied (b)15
    Extension72 ºC60-180 (c)
    Final extension72 ºC210
    PreservationPreservation4 ºC∞

    a. Varied depend on template complexityb. Annealing varied, 62-68C is working; Refer to 1' PCR primers for annealing temperaturec. 1kb ~ 1min extension; enough time allow full extension of sequence

    7.1.

    1' hear-primers used in Huang lab

    ABCD
    NameSequenceTm°CCG%
    NS1B1ngs_H1GCTATGCGCGAGCTGCcctngttgatyctgccagt71.760
    ITS4ngs_H1GCTATGCGCGAGCTGCtcctscgcttattgatatgc6955.6
    LR5_H1GCTATGCGCGAGCTGCtcctgagggaaacttcg70.260.6
    EF1-526F_H1GCTATGCGCGAGCTGCgtcgtygtyatygghcaygt7159.3
    EF1-1567R_H1GCTATGCGCGAGCTGCachgtrccrataccaccratctt70.656
    EF1-2218R_H1GCTATGCGCGAGCTGCatgacaccracrgcracrgtytg72.260.3
    Ben2f_H1GCTATGCGCGAGCTGCtccagactggtcagtgtgtaa70.556.8
    Bt2b_H1GCTATGCGCGAGCTGCaccctcagtgtagtgacccttggc74.562.5
    T22_H1GCTATGCGCGAGCTGCtctggatgttgttgggaatcc70.356.8
    RPB2-3bF_H1GCTATGCGCGAGCTGCggwggwtayttyatyatyaatgg65.648.7
    RPB2-7cR_H1GCTATGCGCGAGCTGCcccatrgcttgyttrcccat72.359.7
    fRPB2-11aR_H1GCTATGCGCGAGCTGCgcrtggatcttrtcrtcsacc71.760.8
    8.

    Carry out electrophoresis for inspection of DNA products

    Gel before markdown
    Gel before markdown
    9.

    Markdown wells and upload the pictures to the Lab Google drive

    Marked gel picture go to the Lab Google drive
    Marked gel picture go to the Lab Google drive

    For 2' PCR barcoded-head primers

    10.

    Prepare 2' PCR master mixutre for barcoded-primers ( prepare 1.2X of solutions for pipetting error if needed )

    PCR mixture for barcoded-primers for each reaction (NO PRIMERs at this point!!)

    ABCD
    ComponentVolumeVolume (1.2X)Final conc.
    2X Supergreen PCR Master Mix10.75 µL12.9 µL-
    ddH2010.75 µL12.9 µL-
    Total volume21.5 µL25.8 µL-

    Note
    Negative control ALWAYS NEEDED! For example, if you have 5 PCR reactions to run, prepare master mixture for 6 reactions (5 DNA template + 1 negative control).

    11.

    Mix the 2' PCR master mixture gently by pippeting. Quick spin the tube.

    12.

    Transfer 21.5µL of the 2' PCR master mixture to 8-strip PCR tubes.

    13.

    Add 2.5µL pre-mixed barcoded-head primers (Forward + Reverse) to each PCR tubes.

    14.

    Add 1µL of 1' PCR product as template , resulting in 25µL reaction mixture for 2' PCR.

    Negative control contains only 24µL master mixture and premixed barcoded-head primers but not DNA template

    15.

    Mix gently by tapping the tubes. Quick spin the tubes.

    16.

    Carry out 2' PCR using the following condition:

    2' PCR condition for barcoded-head primers

    ABCD
    StepTempSecCycle
    Initial denaturation98 ºC30
    Denaturation98 ºC1510-15 cycles
    Annealing64-68 ºC varied (a)15
    Extension72 ºC60 (b)
    Final extension72 ºC210
    PreservationPreservation4 ºC∞

    a. Annealing varied, 65 C is working based on test on 220531; Refer 2' PCR primers for annealing temperatureb. 1kb ~ 1min extension; enough time allow full extension of sequence

    17.

    Carry out electrophoresis for inspection of DNA products

    Gel before markdown
    Gel before markdown
    18.

    Markdown wells and upload the pictures to the Lab Google drive

    Marked gel picture go to the Lab Google drive
    Marked gel picture go to the Lab Google drive

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