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6 protocols using ae001

1

Antibody-based Target Identification Workflow

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The antibodies used in this study were as follows: anti-C1QTNF5, anti-Lamin B1, anti-Na+/K+-ATPase, anti-Myc, anti-β-Actin, anti-GAPDH, anti-GST and anti-His (A3021, A1910, A11683, AE070, AC026, AC002, AE001 and AE003, respectively; ABclonal, China); anti-α-Tubulin, anti-Flag and anti-HA (T6199, F1804 and H6908, respectively; Sigma); anti-NP (ab128193; Abcam); anti-H1N1 HA (11684-MM03; Sino Biological); goat anti-mouse or anti-rabbit IgG (115-035-174 and 111-005-144; Jackson Immuno Research Laboratories); goat anti-mouse antibodies conjugated with Alexa Fluor 488 (A-11001; Invitrogen). The main reagents used in this study were as follows: anti-Flag M2 beads, TPCK, sialidase and blasticidin (A2220, T1426, N7885 and 203350, respectively; Sigma); Lipofectamine 2000 (11668019; Thermo Fisher Scientific); Dual luciferase reporter assay kit (E1980; Promega); Neofect™ DNA transfection reagent (TF20121201; Neofect); Minute™ plasma membrane protein and cell component separation kit (SM-005; Invent Biotechnologies).
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2

Antibody Panel for 3βHSD1 and BMX Phosphorylation

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Mouse monoclonal antibodies against 3βHSD1 (1:2,000, ab55268) and rabbit polyclonal antibodies against phospho-BMX (1:2,000, ab59409) were purchased from Abcam. Mouse monoclonal antibodies against phospho-tyrosine (pTyr) (1:2,000, 05-1050) were purchased from Sigma-Aldrich. custom-made rabbit monoclonal antibodies against phospho-3βHSD1 Y344 (1:2,000) were ordered from Affinity Biosciences. Mouse monoclonal antibodies against GST (1:5,000, AE001) were purchased from Abclonal. Mouse monoclonal antibodies against Flag (1:5,000, F3165) and anti-Flag M2 affinity gel (A2220) were purchased from Sigma-Aldrich. Rabbit monoclonal antibodies against HA (1:3,000, 3724S), β-actin (1:3,000, 3700S), and rabbit polyclonal antibodies against BMX (1:3,000, 24773) and GAPDH (1:5,000, 14C10) were obtained from Cell Signaling Technology.
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3

Protein Pull-Down Assay Protocol

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All proteins used in this study were expressed in Escherichia coli BL21 (induced with 0.5 mm IPTG at 16 °C overnight) and purified using glutathione beads (Smart-Lifesciences, SA008100) or Ni-IDA Beads (Smart-Lifesciences, SA003025). The GST or GST-WEE1 proteins coupled to glutathione beads were incubated with GCN20-HIS in binding buffer (140 mm NaCl, 2.7 mm KCl, 10 mm Na 2 HPO 4 , and 1.8 mm KH 2 PO 4 , pH 7.4) for 2 h at 4 °C. The beads were washed 3 times with washing buffer (140 mm NaCl, 2.7 mm KCl, 10 mm Na 2 HPO 4 , 1.8 mm KH 2 PO 4 , and 1% Triton X-100, pH 7.4). The proteins were eluted by incubating the beads in 2 × SDS loading buffer at 100 °C for 8 min. Both the input and pull-down samples were subjected to immunoblotting using anti-GST (1:4,000, Abclonal, AE001) or anti-HIS (1:4,000, Abclonal, AE003) antibodies.
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4

Phosphorylation Assay of HIS-GCN20 Proteins

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The HIS-GCN20 proteins were incubated with GST-WEE1 or GST-WEE1 kd in phosphorylation buffer (50 mm Tris-HCl, pH 7.4, 150 mm NaCl, 10 mm MgCl 2 , 0.1% Nonidet P-40, 0.1% Triton X-100, 500 µm ATP, and 1 mm PMSF) at 30 °C for 1 h. The reactions were stopped by adding 5 × SDS loading buffer and subjected to SDS-PAGE using gels with or without 25 μm Phos-Tag (Wako, 300-93523). The proteins were subjected to immunoblotting using anti-GST (1:3,000, Abclonal, AE001) and anti-HIS (1:3,000, Abclonal, AE003) antibodies.
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5

Immunoblotting of Recombinant Proteins

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Arabidopsis seedlings were homogenized in proteolysis buffer (25 mm Tris-HCl, pH 7.5, 10 mm MgCl 2 , 10 mm NaCl, 10 mm ATP, and 5 mm DTT) at 4 °C and centrifuged at 12,000 × g for 15 min. The recombinant proteins were incubated with the supernatants at room temperature for different amounts of time. The reactions were stopped by adding 2 × SDS loading buffer and boiled at 100 °C for 8 min. The samples were subjected to immunoblotting using anti-GST (1:3,000, Abclonal, AE001), anti-HIS (1:3,000, Abclonal, AE003), or anti-GS (1:4,000, Agrisera, AS08295) antibodies.
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6

Protein-Protein Interaction Analysis via Pull-Down Assay

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For in vitro pull-down assays, His-tagged BnWRKY33, BnaA03.MKK4, and BnaA09.VQ12, and GST-tagged BnaA06.MPK3, BnaC03.MPK3, BnaA03.WRKY28, and BnaA03.WRKY28 164-227 proteins were used. GST or GST-tagged protein sample was incubated with GST beads at 4°C for 1h, followed by washing five times, and incubation with His-tagged protein at 4°C
for 2 h. The beads were then washed five times. The isolated precipitate was boiled with loading buffer at 100°C for 6 min and detected by western blot using anti-His (Abclonal, AE003, China, 1:10000) or anti-GST (Abclonal, AE001, China, 1:10000) antibodies. The ECL western specific luminescence detection kit (BIO-RAD, #1705060, USA) was used to collect the signal, and the images were scanned using the Image Quant luminescence LAS 4000 machine.
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