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2 protocols using sc 81514

1

Immunoblotting Analysis of Mitotic Regulators

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Nocodazole and Ku55933 were ordered from Selleckchem (Texas, USA). Lambda Protein phosphatase (λPPase) was bought from Sigma-Aldrich Corporation. The anti-ATM (1:1,000, ab201022, Abcam), anti-phospho-ATM (1:1,000, ab81292, Abcam), anti-Mad2 (1:1,000, ab70385, Abcam), anti-Mad1 (1:1,000, ab201022, Abcam), and anti-Cdc20 antibodies (1:1,000, ab183479, Abcam) were bought from Abcam (Cambridge, MA). The anti-HA (1:1,000, 3724T, Cell Signaling Technology), anti-Mad2 (1:1,000, 4636S, Cell Signaling Technology), and the HRP-conjugated secondary antibodies were purchased from Cell Signaling Technology (Danvers, MA). The anti-Flag antibody (1:1,000, F3165, Sigma) was purchased from Sigma. The anti-Mad2 antibody (1:1,000, YT2618, Immunoway) was bought from Immunoway. The anti-GFP (1:1,000, sc-9996, Santa Cruz), anti-Mad2 (1:1,000, sc-47747, Santa Cruz), anti-p-Thr (1:1,000, sc-5267, Santa Cruz), and anti-p-Ser antibodies (1:1,000, sc-81514, Santa Cruz) were bought from Santa Cruz Biotechnology. Goat anti-mouse lgG-H HRP (1:1,000, M21004L, Abmart) and goat anti-mouse lgG-L HRP (1:1,000, M21005S, Abmart) were purchased from Abmart.
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2

TFAM Phosphorylation by PKA Kinase Assay

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Hydroxylated TFAM (1 μg) biotinylated peptide was conjugated with
30 μL Streptavidin agarose beads (GE Healthcare Life Sciences) in 1 ml
PBS at room temperature with rotation for 1 hour. The beads pellet was washed
three times with PBS and resuspended in 500 μL PBS supplemented with 1
μg purified GST-pVHL protein for 2 hours at room temperature.
Subsequently, TFAM phosphorylation by PKA was assayed using PKA Kinase Activity
Assay Kit (ab139435, Abcam) according to manufacturer's instructions.
Samples were centrifuged at 8000 x g for 30 sec and washed three times with PBS
and re-suspended with 50 μL kinase assay dilution buffer supplemented
with 1 μg/μL ATP and 50 ng purified active PKA. The
phosphorylation assay was processed for 40 min at room temperature with rotation
and for 40 min at 30 °C. Samples were centrifuged at 8000 x g for 30 sec
and washed three times with PBS and eluted with 30 μL Laemmli buffer,
boiled for 5 min and centrifuged at 8000 x g for 30 sec. Eluted supernatant was
analyzed by immunoblotting using pan-phospho-serine antibody (Santa Cruz:
sc-81514).
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