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10 protocols using pcdna3.2 v5 dest

1

Investigating USP2A Interactions with Transcription Factors

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The coding region of human USP2A (accession number NM_004205) without the stop codon was cloned into pcDNA3.2/V5-DEST (Thermo Fisher Scientific) using BP clonase II (Thermo Fisher Scientific). The resultant plasmid encoded C-terminal V5-tagged USP2A. Halo-tagged Oct-1 and Oct-2 expression plasmids were purchased from Promega (Madison, WI). The HA-tagged ubiquitin plasmid was purchased from Addgene (Cambridge, MA). The USP2A, or control pcDNA3.2/V5-DEST plasmid, plasmids encoding Halo-tagged Oct-1 or Oct-2 and HA-tagged ubiquitin were transfected into HEK293FT cells using Lipofectamine 2000 reagent (Thermo Fisher Scientific). The pull-down and elution of Oct proteins were performed using Magne HaloTag beads (Promega) and HaloTEV protease (Promega) as per the manufacturer's instructions. For detection of Western blot bands, corresponding to K48- and K63-linked ubiquitin chains, Oct proteins, HA-tagged ubiquitin, and V5-tagged USP2, 1000-fold-diluted antibodies against polyubiquitin chains formed by K48 residues (ab140601; Abcam) and K63 residues (ab179434; Abcam), Oct-1 (A301-717A; Bethyl Laboratories), Oct-2 (ab179808; Abcam), HA-tag (#3724; CST), and V5-tag (A190-120F; Bethyl Laboratories) were used as the primary antibodies.
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2

STAT3-Dependent Luciferase Reporter Assay

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The Stat3-C Flag pRc/CMV (CA-STAT3) was a gift from Jim Darnell (Addgene plasmid #8722) [48 (link)], and pCDNA3.2/V5-DEST was from Thermo Fisher Scientific. pGL4.47[luc2P/SIE/Hygro] (a firefly luciferase reporter plasmid under the control of five copies of STAT3 responsive element) and pRL-SV (a Renilla luciferase reporter plasmid under the control of SV40 promoter) were provided by Promega. Huh7 cells in Opti-MEM medium (Thermo Fisher Scientific) were transiently transfected with pGL4.47[luc2P/SIE/Hygro] (300 ng) and pRL-SV (30 ng) for 6 h using a FuGENE® HD Transfection Reagent (Promega). After replacing the transfection medium with the growth medium containing 10% FBS, the cells were treated with 5–20 μM HsA for 18 h. In some experiments, Huh7 cells were transfected with 300 ng of CA-STAT3 in conjunction with reporter plasmids for 12 h, and then exposed to HsA. The same amount of pCDNA3.2/V5-DEST was used for mock transfection. Luciferase activities in the cell lysates were determined using a Dual-Luciferase® Reporter Assay System (Promega), and luminescence intensity of firefly luciferase was normalized by that of Renilla luciferase.
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3

Gateway-Based Protein Expression Techniques

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All primer sequences and plasmids used in this study are listed in S1 Table. pEU-based expression vectors, including pEU-E01-GW, pEU-E01-bls-SrtA-GW, pEU-E01-FLAG-GW, pEU-E01-GW-FLAG, pEU-E01-AGIA-GW, and pEU-E01-GW-AGIA, were used for wheat germ cell-free protein synthesis. pcDNA3.1 and pcDNA3.2/V5-DEST (Thermo Fisher Scientific) are vectors for mammalian cell expression. p35SΩ-GW-NOST was used for protein expression in plant cells [40 (link)].
Genes of interest were subcloned using Gateway Technology (Thermo Fisher Scientific). The AGIA tag sequence was inserted at the 5′- or 3′- end of the open reading frame (ORF) by PCR. Deletion and substitution of amino acids in the AGIA sequence were conducted using the PrimeSTAR Mutagenesis Kit (Takara Bio). Human genes (DRD1, MIB2, RelA, MARCH8, OCT4, GATA3 and p53) were obtained from the Mammalian Gene Collection (MGC) full-length cDNA clone set [41 (link)]. Mouse Mdm2 was from FANTOM cDNA clones [42 (link)]. The cDNA clones of AtGID1A and AtUBQ10 were amplified from RIKEN Arabidopsis full-length cDNA (RAFL) clones [43 (link)]. Modification of expression vectors was performed using inverse PCR and In-Fusion cloning kit (Takara Bio).
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4

Cloning and Mutagenesis of EphA2 and Pendrin

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pCMV-Myc-pendrin was a kind gift from Professor Min Goo Lee. pcDNA3.2-V5-EphA2 construction was achieved by using GatewayTM LR ClonaseTM II Enzyme Mix (Invitrogen, 11791-020) according to the manufacturer’s instructions; pDONR223-EphA2 (Addgene, 23926) and pcDNA3.2/V5-DEST (Thermo Fisher, 12489019) were used as donor vector and destination vector. FLAG-HA-pcDNA3.1-EphA2-1-558 and FLAG-HA-pcDNA3.1-EphA2-538-976 were subclone of EphA2 intracellular domain including transmembrane domain (amino acid 1-558) and extracellular domain including transmembrane domain (amino acid 538-976) into FLAG-HA-pcDNA3.1 backbone. The primers used for domain cloning were shown in Suppementary Table 2. Point mutagenesis of pendrin and EphA2 were generated by using KOD Hot Start Mutagenesis kit (Merck Millipore, Toyobo; 71086-3); the pcDNA3.2-V5-EphA2 and pCMV-Myc-pendrin constructs were used as backbones. The primers used for point mutagenesis were listed in Supplementary Table 2.
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5

Tau Overexpression in Differentiated SH-SY5Y

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The human 4-repeat tau isoform, hTau40, was subcloned into pcDNA3.2/V5/DEST (Invitrogen) by Gateway® cloning and transfected into SH-SY5Y cells using Lipofectamine 3000® (Invitrogen). The hTau40 plasmid contains the longest isoform of tau, with exons 2, 3, and 10 present and a total size of 441 amino acids. Tau SH-SY5Y transfectants were selected with 250µg/ml G418 (BioShop, Burlington, ON, Canada) for 30 days (Pennanen and Gotz, 2005 (link)). To induce neuronal differentiation, cells were treated with 10µM retinoic acid (Sigma-Aldrich, Oakville, ON) for 10 days, as described previously (Garzon and Fahnestock, 2007 (link); Rosa and Fahnestock, 2015 (link)). V5 expression was quantified via Western blotting to ensure hTau expression following differentiation, and total BDNF mRNA and BDNF transcript IV mRNA levels were quantified via qRT-PCR and compared to non-transfected control cells.
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6

Recombinant Equine CD154 Protein Production

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To obtain the recombinant equine CD154 protein for the purpose of in vitro assays, CHO cells (ATCC CCL-61™) were cultured at a concentration of 1 × 106 cells/ml in 60 mm diameter Petri dishes (Fisher Scientific, Waltham, MA) in antibiotic free DMEM with 10% fetal bovine serum. Prior to transfection, the lethal dose of Geneticin® for CHO cells was determined according to the manufacture r’s guidelines for the expression plasmid used, pcDNA3.2 V5 DEST (Invitrogen, Carlsbad, CA), which contains a neomycin resistance gene conferring resistance of transfected cells to Geneticin®. The cells were transfected with pcDNA3.2 V5 DEST containing recombinant equine CD154 using chemical transfection (TransIT-LTI, Mirus Bio, L.L.C., Madison, WI) according to the manufacturer’s instructions, and cultured for 48 h at 37 °C in a humid if ied in cu b at or with 5% CO2 before the first change of media. Selection of stably transfected cells expressing the recombinant equine CD154 protein was performed in media containing Geneticin® (125 μg/ml) after two weeks of incubation. Cell clones were expanded under similar conditions and used as described.
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7

Constructing HCV Genotype 1 Pseudoparticles

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Plasma samples obtained from HCV infected subjects in the BBAASH cohort [15 (link),16 (link),45 ], Irish Anti-D cohort [46 (link)], and Swan Project [47 (link)] were used to construct a library of genotype 1 E1E2-expressing lentiviral pseudoparticles using a high-throughput production and screening approach. The E1E2 region was PCR amplified from cDNA reverse transcribed from viral RNA purified from subject plasma and cloned into the expression vector pcDNA3.2/V5/Dest (Invitrogen) using Gateway technology in a one-tube BP/LR reaction, as previously described [19 ].
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8

PCR Amplification and Cloning of E1E2 Region

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The E1E2 region was PCR amplified from cDNA reverse transcribed from viral RNA purified from subject plasma and cloned into the expression vector pcDNA3.2/V5/Dest (Invitrogen, USA) using Gateway technology in a one-tube BP/LR reaction. Details are described in Supplementary Methods.
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9

TaRXR Transcript Sequence Amplification

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Using the TaRXR transcript sequence we determined from our RACE products, we amplified the full-length open reading frame (Forward primer: GCTTGCATGGAGGACAGATC, where underlined ATG is the start site; Reverse primer: CTGACCCACAATACAAGACAGC) and developed a protein expression construct using the Gateway cloning system (Thermo Fisher). We used pcDNA3.2/nV5-DEST (Invitrogen) generate a protein tagged with the v5 epitope at the amino terminus. We also obtained the human RXRα (HsRXRα) in the pDONR221 vector from the Harvard Medical School (Clone HsCD00079702). We subcloned this into pcDNA3.2/V5-DEST (Invitrogen) but included the endogenous stop codon to generate an untagged protein.
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10

Drosophila Mitochondrial Dynamics Protocols

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mtYFP (pEYFP-mitochondria [mito]) and ER-YFP (pEYFP-ER) were purchased from Takara Bio, Inc. Mitochondrial targeted DsRED (mtRFP) was a gift from T. Pozzan (Venetian Institute of Molecular Medicine, Padua, Italy; Cipolat et al., 2004 (link)). pcB6-Myc-Mfn1 and pcB6-Myc-Mfn2 were a gift from M. Rojo (Salpetriere Hospital, Paris, France; de Brito and Scorrano, 2008 (link)).
Total RNA from adult Drosophila heads was purified with TRIZOL (Invitrogen). The Marf full-length cDNA was obtained by RT-PCR performed on total Drosophila head RNA. The full-length cDNA of Marf was first cloned in pDONR221 (Invitrogen) and then into pcDNA3.2/V5-DEST by Gateway cloning (Invitrogen). pAc5.1-Atl™-GFP was generated by cloning the 120 amino acids of the transmembrane domain of Drosophila atlastin (Orso et al., 2009 (link)) into pAc5.1/V5-His (Invitrogen), previously modified with the insertion of the EGFP sequence from the pEGFP-N1 vector (Takara Bio Inc.). mtGFP was generated by subcloning the cDNA from pEGFP-mito (Takara Bio Inc.) into pActin-PPA. For generation of double-stranded RNA (dsRNA)–resistant mutant of Marf (Marf-RNAiR). Invariant-coding mutagenesis A → T84 and A → T90 of pAc5.1/V5-His-Marf was performed by using the site-directed mutagenesis kit (QuikChange; Agilent Technologies).
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