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4 protocols using anti lamin a c sc 20681

1

Isolation and Analysis of Protein Ubiquitination

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Liver tissues or cell pellets were lysed in hypotonic buffer (5 mM Tris-HCl, 1 mM MgCl2, 3 mM CaCl2, 8% Sucrose). After centrifuge, pellets were washed once with hypotonic buffer and re-suspended in RIPA buffer (5 mM Tris-HCl, 150 mM NaCl, 0.1% SDS, 0.05% deoxycholic acid, 10% Glycerol) prior to sonication for 5 s. Nuclear fractions were then collected after centrifugation at 13,000 rpm × 10 min. FLAG-M2 beads or streptavidin beads were added into nuclear fractions to capture FLAG-CRY1 or CBP-CRY1. The protocol for detecting ubiquitination was reported [20 (link)] with minor modifications. anti-ChREBP was used to pull down poly-ubiquitinated ChREBPα conjugates. Western blot analysis was performed using the following primary antibodies: anti-DDB1 (Abcam ab9194), anti-CRY1 (sc-101006), anti-GAPDH (sc-25778), anti-Lamin A/C (sc-20681), anti-CBP (sc-33000) (Santa Cruz biotechnology), anti-ChREBP (Novus NB400–135), anti-ubiquitin (Sigma U5379), and anti-β-tubulin (T5201) (Sigma-Aldrich).
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2

Protein Analysis via Western Blot

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Western blots were performed as previously described [8 (link)]. Primary antibodies (all rabbit) were anti-AQP5 (Alomone Labs AQP-005), anti-CAV1 (Abcam ab2910), anti-pro-SFTPC (Millipore AB3786), anti-ACTB (Abcam AB8226), anti-PDPN (Developmental Studies Hybridoma Bank #8.1.1), and anti-LAMIN A/C (sc-20,681, Santa Cruz Biotechnology). Blots were analyzed by chemiluminescence and visualized by West Fempto Super Sensitivity Kit (Thermo Scientific) with a FluorChem 8900 Imaging System (Alpha Innotech).
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3

Isolation and Analysis of Protein Ubiquitination

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Liver tissues or cell pellets were lysed in hypotonic buffer (5 mM Tris-HCl, 1 mM MgCl2, 3 mM CaCl2, 8% Sucrose). After centrifuge, pellets were washed once with hypotonic buffer and re-suspended in RIPA buffer (5 mM Tris-HCl, 150 mM NaCl, 0.1% SDS, 0.05% deoxycholic acid, 10% Glycerol) prior to sonication for 5 s. Nuclear fractions were then collected after centrifugation at 13,000 rpm × 10 min. FLAG-M2 beads or streptavidin beads were added into nuclear fractions to capture FLAG-CRY1 or CBP-CRY1. The protocol for detecting ubiquitination was reported [20 (link)] with minor modifications. anti-ChREBP was used to pull down poly-ubiquitinated ChREBPα conjugates. Western blot analysis was performed using the following primary antibodies: anti-DDB1 (Abcam ab9194), anti-CRY1 (sc-101006), anti-GAPDH (sc-25778), anti-Lamin A/C (sc-20681), anti-CBP (sc-33000) (Santa Cruz biotechnology), anti-ChREBP (Novus NB400–135), anti-ubiquitin (Sigma U5379), and anti-β-tubulin (T5201) (Sigma-Aldrich).
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4

Western Blot Analysis of Lamin Proteins

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Nuclei were homogenized in 50 mM tris (pH 7.4), 150 mM NaCl, 1% NP-40, 50 mM NaF, 1 mM DTT, and complete protease inhibitor cocktail (2 mg/ml; Roche). The whole amount of protein from homogenates was quantified using a BCA Protein Assay Kit (Pierce), and 15 g from each sample was loaded in SDS-polyacrylamide gels. After electrophoresis at 120 mV, gels were electrotransferred onto polyvinylidene fluoride membranes, blocked with 3% nonfat dry milk, and incubated overnight at 4°C with 1:2000 anti-Lamin-A/C (sc-20681, Santa Cruz Biotechnology), 1:1000 anti-Lamin-B1 (sc-374015, Santa Cruz Biotechnology), and 1:10,000 anti-actin (sc-1616, Santa Cruz Biotechnology) in tris-buffered saline with 0.05% Tween 20. Finally, blots were incubated with 1:10,000 goat anti-rabbit horseradish peroxidase (HRP; sc-2004, Santa Cruz Biotechnology) or 1:10,000 anti-mouse HRP (sc-2005, Santa Cruz Biotechnology) in 1.5% nonfat milk. Proteins were detected by chemiluminescence in a ChemiDoc camera (UVP), and the intensity of each band was quantified in digital images using the ImageJ software (NIH).
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