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23 protocols using ab15568

1

Comprehensive Western Blot Analysis

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Cells on petri dish were washed with PBS then lysed with 1X SDS-PAGE sample loading buffer diluted from 4X loading buffer (250 mM Tris-HCl pH 6.8; 8% SDS; 0.2% Bromophenol Blue; 20% β-mercaptoethanol; 40% glycerol). Whole cell lysates were heated at 95°C for 5 min and separated by SDS-PAGE and transferred to polyvinylidene fluoride (PVDF) membrane. Western blotting was conducted by blocking the membranes in 5% non-fat milk then probing with primary antibodies in 5% non-fat milk for 1 h. Membranes were washed extensively with PBST (phosphate buffered saline supplemented with 0.5% Tween 20), then incubated with HRP-conjugated secondary antibodies for 30 min. After extensive wash with PBST, bound HRP-conjugated secondary antibody was detected by enhanced chemiluminescence (ECL). Antibodies against human mTOR (ab2732), mTOR-S2481 (ab137133), S6K1 (ab9366), S6K-T389 (ab2571), RAGC (ab226199), RAB1A (ab241132), RAB5 (ab18211), and Tubulin (ab15568) were purchased from Abcam. Antibody against LC3 (848801) was from BioLegend.
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2

Immunostaining of Expanded Samples

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Punches were blocked in IF buffer (1% BSA and 0.05% Tween‐20 in PBS) for 1–2 h at RT, followed by the incubation with primary antibody diluted in IF buffer, for 24 h at 4°C. Punches were washed in 1× PBS for 1–2 h and incubated for 24 h at 4°C with secondary antibody and DAPI (ThermoFisher; D1306) diluted 1:10 000 in IF buffer. The following primary antibodies were used for immunostaining of expanded samples: mouse anti‐acetylated tubulin (Sigma, T7451) at 1:4000, mouse anti‐alpha tubulin (Sigma; T6074) at 1:500, rabbit antibeta tubulin (Abcam; ab15568) at 1:250, rabbit anti‐ARL13B (Abcam; ab83879) at 1:150, rabbit anti‐Cep164 (Proteintech; 22227‐1‐AP) at 1:500, rabbit anti‐ANKRD26 (GeneTex; GTX128255) at 1:200, rabbit anti‐FBF1 (sigma; HPA023677) at 1:100, rabbit anti‐RPGRIP1L (Proteintech; 55160‐1‐AP) at 1:150, rabbit anti‐IFT88 (Proteintech; 13967‐1‐AP) at 1:150, mouse anti‐Rootletin (Santa Cruz; sc‐374056) at 1:50, rabbit antipericentrin (Abcam; ab4448) at 1:400, rabbit anti‐Cep290 (Abcam; ab84870) at 1:150 and rabbit antipolyglutamylated tubulin (AdipoGen; AG‐25B‐0030) at 1:800. Secondary antibodies antimouse Alexa Fluor 488 (Invitrogen; A11029), antirabbit Alexa Fluor 488 (Invitrogen; A11034), antimouse Alexa Fluor 555 (Invitrogen; A28180), antirabbit Alexa Fluor 555 (Invitrogen; A21429) were used at a 1:800 dilution to label primary antibodies.
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3

Western Blot Analysis of Cell Signaling Proteins

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The SMCs in each group were solicited using the Sonics Vibracell sonicator with a 0.4 mm diameter probe. Proteins in each sample were determined by a Bradford assay (Bio-Rad, Hercules, USA). The samples were denatured at 95°C for 3 min in 1x Nu Page sodium dodecyl sulphate sample buffer (Life Technologies, Carlsbad, USA). Equal amounts of protein were loaded, electrophoresed, and transferred to Immobilon-P membranes (Merch Millipore, Darmstadt, Germany). The membranes were blocked overnight in 5% BSA, followed by 3 h incubation in primary antibodies (0.5 μg/mL) at room temperature. Then the membranes were washed and incubated with secondary antibodies for 1 hour. Antibodies for phospholipase C-beta 1 (ab77743, 1 : 300), protein kinase C (ab23511, 1 : 300), adenylate cyclase (ab124241, 1 : 300), and β-tubulin (ab15568, 1 : 1000) were from Abcam (Cambridge, UK). The protein of β-tubulin was used as internal housekeeping protein. Immunoreactivity was detected using a chemiluminescence's system and quantified by using Image J software (Bio-Rad, Hercules, USA).
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4

Western Blot Analysis of Mitochondrial Proteins

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Laemmli buffer containing 4% SDS, 10% β-mercaptoethanol (M6250; Sigma-Aldrich), 20% glycerol (GI345; Melford), 0.004% blue bromophenol (A2331,0025; AppliChem), and 0.125 M Tris-HCl was added to protein lysates, followed by boiling at 95°C for 10 min. Samples were separated on SDS-PAGE and transferred to a nitrocellulose (Macherey-Nagel) or a polyvinylidene difluoride (Merck) membrane. The membranes were blocked with 5% milk (A0830; PanReac AppliChem) and probed with the following antibodies: anti–β-Actin (ab8227; Abcam), anti–β-Tubulin (ab15568; Abcam), anti-CBS (14787-1-AP; Proteintech), anti-CSE (12217-1-AP; Proteintech), anti-MPST (HPA001240; Atlas Antibodies), anti-MTCO1 (ab14705; Abcam), anti-Citrate Synthase (ab96600; Abcam), anti-SOD2 (13141; Cell Signaling), anti-TOM40L (ab236421; Abcam), anti-TIM50 (ab109436; Abcam), anti-HIF1α (sc-13515; Santa Cruz Biotechnology), anti-H3 (ab176842; Abcam), anti-V5 (Merck), anti-HA (H6908; Sigma-Aldrich), and anti-Biotin (HRP conjugate; 5571; Cell Signaling). Immunoblots were next incubated with a secondary antibody (anti-rabbit [AP132P; Merck] or anti-mouse [7076; Cell Signaling]) and visualized using the Western HRP substrate (Merck). ImageJ software was used to quantify the expression levels of the proteins.
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5

Immunofluorescence Assay of PRUNE in SH-SY5Y Cells

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SH-SY5Y inducible clones were plated and grown for 24 h in the presence of doxycycline. Then, inducible cells growing on the coverslips were incubated on ice for 1 h and then at 30°C for 2 min. Cells were fixed in 4% paraformaldehyde and permeabilized for 10 min in phosphate buffer containing 0.1% Triton X-100, before incubation with 0.1% Triton X-100, 10% pig serum and either anti-β-Tubulin (1 µg/ml; Abcam, ab15568), anti-PRUNE (1 µg/ml; Abcam, ab88613) antibodies. Confocal microscopy was carried out using a laser scanning confocal microscope LSM 510 META, Zeiss, with 40×/63× water immersion objectives.
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6

Immunoblotting Analysis of Viral Proteins

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Lysates from the above mentioned assays were analyzed by SDS-PAGE, using standard 12% SDS-PAGE to resolve mCherry and its XP-fusion variants, and precast Novex™ 10–20% tricine protein gels (Thermo Fisher) to resolve XPs and enterovirus 2B. Proteins were then transferred to 0.2 µm nitrocellulose membranes and blocked with 4% Marvel milk powder in phosphate-buffered saline (PBS). Immunoblotting of mCherry was performed using anti-mCherry antibody (Abcam, ab167453, 1:3000). A custom rabbit polyclonal antibody raised against XP peptide SNSGNRVSQDQNLQ (GenScript; only able to detect strongly overexpressed XP, 1:250) and an anti-Strep mouse antibody (Abcam, ab184224, 1:1000) were used for detecting HAstV1 XP and Strep-tagged proteins, respectively. The following antibodies were used for cellular targets: anti-tubulin (Abcam, ab15568, 1:500), anti-VDAC1 (Abcam, ab14734, 1:1000), and anti-LAMIN A + C (Abcam, ab133256, 1:3000). Immunoblots were imaged on a LI-COR ODYSSEY CLx imager and analyzed using Image Studio™ version 5.2.
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7

SDS-PAGE Protein Separation and Immunoblotting

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Thirty micrograms of protein samples from LSTs and other groups were separated on a 10% or 12% SDS-PAGE and transferred to nitrocellulose membranes (Millipore). Protein bands were visualized using a conventional enhanced chemiluminescence (ECL) system (GE Healthcare, USA) and quantified with Quantity One (Bio-Rad, USA). Primary antibodies used were anti-LCN-2 antibody (ab23477, 1:500; Abcam), anti-MMP-9 (PAB19095, 1:200; Abnova), and anti-beta tubulin antibody (ab15568, 1:200; Abcam).
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8

Immunoblot Analysis of Enterovirus Proteins

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Lysates from virus-infected or pCAG-transfected cells were analyzed by SDS-PAGE, using standard 12% SDS-PAGE to resolve virus structural proteins and precast Novex™ 10–20% tricine protein gels (Thermo fisher) to resolve UP. Proteins were then transferred to 0.2 µm nitrocellulose membranes and blocked with 4% Marvel milk powder in phosphate-buffered saline (PBS). Immunoblotting of the enterovirus VP3 structural protein was performed using Enterovirus pan monoclonal antibody (Thermo Fisher, MA5-18206) at 1:1,000 dilution. A custom rabbit polyclonal antibody raised against C-terminal UP peptide CPPRKPEPMRLG (GenScript), an anti-Strep mouse antibody (Abcam, ab184224), and an anti-HA mouse antibody (Abcam, ab130275) were used for detection of EV7 UP, EV7 Strep-tagged UP, and PV1 HA-tagged UP, respectively. The following antibodies were used for cellular targets: anti-tubulin (Abcam, ab15568), anti-VDAC1 (Abcam, ab14734), anti-GAPDH (Ambio, AM4300) and anti-calnexin (Merck, MAB3126). To ensure synchronicity of infection, a high MOI was used for virus infections. Immunoblots were imaged and analyzed on a LI-COR imager. The original LICOR scans and quantifications are shown in Fig. S11.
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9

Antibody Immunoprecipitation and Western Blot Analysis

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The following antibodies were used for immunoprecipitation and/or microfluidic western blot analysis by ProteinSimple (PS), immunohistochemistry (IHC), immunofluorescence (IF): CD31 (553371, MEC13.3, BD Biosciences; 1:500 for IF), laminin (ab11575, Abcam; 1:400 for IF), involucrin (ab28057, Abcam; 1:100 for IHC), FAK (06–543, EMD Millipore; 1:50 for PS; 1:100 for IF), paxillin (610051, 349, BD Biosciences, 1:100 for IF), phospho-FAK Y397 (AF4528, R&D Systems; 1:200 for PS), phospho-FAK Y397 (44-624G, Thermo Fisher Scientific; 1:100 for IF), β-tubulin (ab15568; Abcam; 1:50 for PS), SRC (2109, 36D10, Cell Signaling Technology; 1:50 for PS), phospho-SRC Y416 (2101, Cell Signaling Technology; 1:10 for PS).
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10

Immunostaining and Expansion Microscopy

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Punches were blocked in IF buffer (1% BSA; [Sigma-Aldrich; A9647] and 0.05% Tween-20 [Sigma-Aldrich; P9416] in 1× PBS) for 1–2 h at RT, and incubated with primary antibody diluted in IF buffer for 24 h at 4°C. Punches were washed in 1× PBS for 1–2 h and incubated with secondary antibody and DAPI (1:10,000 final dilution; Thermo Fisher Scientific; D1306) in IF buffer for 24 h at 4°C. The following primary antibodies were used for immunostaining: mouse anti-acetylated tubulin (Sigma-Aldrich; T7451) at 1:4,000, rabbit anti-β tubulin (Abcam; ab15568) at 1:250, rabbit anti-ARL13B (Abcam; ab83879) at 1:500, rabbit anti-Cep290 (Abcam; ab84870) at 1:600, and rabbit anti-Cep164 (Proteintech; 22227–1-AP) at 1:500. Secondary antibodies Alexa Fluor 488 anti-mouse (Thermo Fisher Scientific; A11029) and Alexa Fluor 555 anti-rabbit (Thermo Fisher Scientific; A21429) were used at a 1:800 dilution to label primary antibodies for 24 h. After immunostaining, the samples were expanded in deionized H2O for 2 h at RT with deionized H2O exchanged every 10 min and additionally overnight at 4°C. Prior to imaging, expanded punches were mounted in Rose chambers, Attofluor cell chambers, or glass-bottom Microwell dishes (MatTek; P35G-1.5-14-C).
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