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Pgem t

Manufactured by Promega
Sourced in United States, Germany, United Kingdom, China, Switzerland, Japan

pGEM-T is a plasmid vector designed for the cloning of PCR products. It contains the lacZ gene and multiple cloning sites, allowing for blue-white screening and easy insertion of DNA fragments. The vector is supplied linearized with 3'-terminal thymidine residues to improve the efficiency of ligation of PCR products.

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255 protocols using pgem t

1

Construction of Vag8 Knockout Strain

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The construction of a Vag8 knock-out strain was performed as previously described [67 (link)]. Briefly, a fragment of 1000 base pairs downstream vag8 was amplified using primers Vag8_1_F and Vag8_1_R and a fragment of 887 base pairs upstream of vag8 was amplified using primers Vag8_2_F and Vag8_2_R (primers are listed in Table 2). The DNA was cloned into plasmid pGEM-T (according to the manufacturer's instructions) (Promega) resulting in the plasmid pGEM-T::Vag8. Subsequently, a kanamycin resistance gene cassette was cloned into the SalI restriction site resulting in pGEM-T::Vag8::KAN. Then, the Vag8::KAN construct was cloned into pSS1299 [62 (link)] resulting in pSS1299::Vag8::KAN and subsequently transformed in E. coli strain SM10. The latter plasmid was used to replace vag8 by the kan gene into B1917 by allelic exchange [62 (link)]. Correct insertion was analysed by PCR and loss of Vag8 expression was confirmed by immunoblotting as described below using 1μg/ml of polyclonal rabbit anti-Vag8 antibody. The Vag8 antibody was produced by Genscript via their New PolyExpress basic package using the following peptide: CGNMGGRVDAGARQY (GenScript).
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2

Recombinant Expression of PP5 Protein

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In order to generate a recombinant PP5 protein, a 1.4 kb region containing PP5 was amplified from genomic DNA of L. major FV1 using the primers 5′-ACC CTC GAG ATG GAG GAG TCC GAC CGC-3′ (XhoI), R 5′-GCC GCG GCC GCT TAA AAT AGA CCC GCG CC-3′ (NotI) and LongAmp high-fidelity Taq-DNA polymerase (New England Biolabs) following the manufacturer’s recommendation. The product was cloned into pGEM-T (Promega) to create pGEM-T-PP5. N-terminal GST-PP5 fusions (Glutathione S-Transferase) were obtained by inserting the 1.4 kb PP5 fragment from pGEM-T into the respective site of pGEX-5x. pGEX-5x-PP5 constructs were then transformed in BL-21 Escherichia coli (E. coli) cells (NEB). Cells transfected with the empty vector, pGEX-5x, were used as mock controls.
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3

Construction of pcDNA3.1-HBVDNAPTP1 Expression Vector

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For construction of eukaryotic expression vector pcDNA3.1 (-)/myc-His A-HBVDNAPTP1, the HB-VDNAPTP1 fragment was PCR-amplified with the forward primer (5′- GGATCCATGATGTTTGTGCT-GCTAAAC), containing an BamHI site and reverse primer (5′- AAGCTTATAAGTCCTCTCTAAAATTGC), containing a HindIII site. The fragment was inserted into the cloning vector pGEM-T (Promega), resulting in pGEM-T-HBVDNAPTP1. An BamHI-HindIII fragment was isolated from the vector and inserted into BamHI and HindIII digested pcDNA3.1 (-)/myc-His A (Invitrogen), giving pcDNA3.1 (-)/myc-His A-HBVDNAPTP1. The vector was sequenced and digested with corresponding restriction enzymes to confirm the sequence accuracy.
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4

Transgenic Expression of GFP-MPK10 Fusion Protein

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For transgenic expression of GFP-MPK10 fusion protein, the gene encoding the L. major MAPK homologue LmaMPK10 (accession number CAJ02415) was PCR amplified from 50 ng of genomic DNA of L. major FVI using primers 5′-ACCAGATCTCCACCATGCAGGCCAAGGGC-3′ (forward) and 5′-GCGAGATCTTCACGACGGGGCCGGCGC-3′ (reverse) and cloned into pGEM-T (Promega) to obtain pGEMT-MPK10. This plasmid was subsequently digested by BglII and subcloned into pXG-GFP+2 to generate pXG-GFP-MPK10 (kindly provided by S. Beverley, Washington University Medical School, St. Louis, MO, USA). The various MPK10 mutants described in the results section were obtained by site direct mutagenesis of pGEMT-MPK10 using the QuickChange II XL Site-Directed Mutagenesis kit (Stratagene) prior to subcloning into pXG-GFP2+. MPK10-ΔC was PCR amplified with primers 5′-ACCAGATCTCCACCATGCAGGCCAAGGGC-3′ (forward) and 5′-GCGAGATCTTCAGTCGTTGAAGCGCTCC-3′ (reverse) containing a stop codon to generate a protein deleted for the last 46 amino-acids (138 nucleotides) from the C-terminal end of LmaMPK10, and was cloned into pXG-GFP2+ as described above to generate the pXG-GFP-MPK10-ΔC construct. All constructs were validated by sequence analysis.
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5

Rice Transformation Vector Construction

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The pGEM-T (Promega, Madison, WI, USA) and pGEM-T Easy vectors were used to clone PCR-amplified DNA segments. We used the psGFP (S65T) expression vector which carries a modified green fluorescent protein (GFP) gene sGFP (S65T) under the control of the cauliflower mosaic virus 35S promoter; CaMV35S [48 (link)]. To clone the suppressing version of OsY37, we used the plasmids pActSRDXG and p35SSRDXG carrying rice actin, Act1 promoter, and CaMV35S promoter respectively together with the transcription factor repression domain; SRDX comprising amino acid residues, GLDLDLELRLGFA. The japonica OsY37N full-length clone in the vector pME18SFL3, was obtained from the National Institute of Agrobiological Sciences (http://www.dna.affrc.go.jp/jp/). Versatile plant binary vector, pIG121Hm, confers hygromycin resistance (HgrR) to rice plants and Agrobacterium tumefaciens [49 (link)] and kanamycin resistance to A. tumefaciens and Escherichia coli. Primers used in the present report are listed in Table 1.
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6

Cloning and Sequencing Validation Protocols

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The coding region of the genes selected for qRT-PCR validation of the RNA-Seq data were cloned into pGEM-T (Promega). PCR was performed with 1X ThermoPol Buffer, 200 µM dNTP, 1.25 units/ 50 µL of Taq Polymerase, 0.2 µM of each primer (Table S4), and P. stewartii DC283 chromosomal DNA template. Thermocycler settings per enzyme protocol (New England Biolabs) were denaturation at 95 °C for 30 s, annealing for 60 s at the appropriate temperature (Table S4), and extension at 68 °C for 30 s, performed for 30 cycles. The final extension was 68 °C for 5 min. The PCR products were visualized on a 1% agarose gel, and extracted using a Gel Extraction Kit (Qiagen). Fragments were modified by addition of dATP via Taq polymerase and a PCR Purification Kit (Qiagen) was used to remove additional dATPs. This PCR product was then ligated into the pGEM-T vector (Promega, Madison, WI, USA) and the resulting plasmid was transformed into E. coli Top 10 (Table S1). Plasmids containing the coding regions were screened via PCR and sequenced (VTBI) to confirm the construct.
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7

Identification and Cloning of BPPS Genes

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We screened a previously reported L. x intermedia transcriptome database (Adal et al. 2019 (link)) for potential BPPS synthase, and identi ed a candidate with signi cant homology to previously reported plant BPPS genes. Using gene-speci c primers, the full-length LiBPPS cDNA (GenBank: MW846855) was cloned into pGEM-T (Promega) and, its sequence was con rmed by Sanger sequencing. The full-length genomic DNA for (+)-LiBPPS was ampli ed from L. x intermedia cv. Grosso, cloned into pGEM-T (Promega), and sequenced by Sanger sequencing.
For comparative studies, we also cloned the L. angustifolia BPPS (LaBPPS) cDNA from our L. angustifolia EST database (Lane et al. 2010) (link). Brie y, the cDNA encoding LaBPPS was ampli ed by PCR and cloned into various vectors for con rmation of DNA sequence, and for heterologous expression in bacteria (see below). All primers used in this study are listed in Table S1.
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8

Nested PCR for ILTV DNA Detection

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A nested PCR was used to test for the presence of ILTV DNA in TG collected on 21 dpv, TG co-culture supernatants and selected swabs collected on 21 dpv. Conjunctival mucosa, palatine cleft, infraorbital sinus and tracheal swabs were only tested for the presence of ILTV DNA using the nested PCR if the swabs collected 21 dpv tested negative for ILTV DNA using the less sensitive UL15 qPCR, and if the TG sample from the same individual bird was positive for ILTV using the nested PCR. This nested PCR, the universal herpes virus (UHV) nested PCR, targets a conserved region of the herpes virus DNA polymerase gene [38 (link)]. Products amplified during the second round of this PCR were purified using QIAquick Gel Extraction Kit (QIAGEN, Hilden, Germany) following the manufacturer’s instructions. Depending on the yield of purified DNA, amplicons were either directly subjected to sequencing or cloned into pGEM-T (Promega) following manufacturer’s instructions before sequencing. Sequencing reactions were performed using Big Dye Terminator v3.1 (Life Technologies Corporation, Carlsbad, USA) according to manufacturer’s instructions. Sample electrophoresis and sequencing was performed at the Centre for Translational Pathology, University of Melbourne. Geneious software version 9.1.3 [39 (link)] was used to analyse the sequencing data.
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9

CRISPR-Mediated Gene Tagging in mESCs

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Mouse embryonic stem cells were electroporated (Lonza nucleofection) per the manufacturers protocol with px458-mCherry56 (link) carrying Cas9 and a single sgRNA targeting the C-terminus of Sox2 (TGCCCCTGTCGCACATGTGA) as well as two linearized pGEM-T (Promega) donors containing either GFP or BFP and 1 kb homology arms. GFP/BFP double positive cells were single- cell sorted by FACS and clonally selected.
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10

Identification of Chaihu-Shugan-San Compounds

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Dried crude herbs (Chaihu-Shugan-San, CSS) were purchased and identified in the pharmacy of Xiangya Hospital (Changsha, China). Voucher specimens (CH-NO-15021714, BS-NO-15021411, CP-NO-15020914, XF-NO-15021118, CX-NO-15022413, ZK-NO-15020706, GC-NO-15022715) were obtained and kept in the Laboratory of the Institute of Integrative Medicine, Central South University. Glycyrrhetinic acid (GA) was purchased from the Beijing Hengyuan Qitian Chemical Industry (Beijing, China). Rifampicin (RIF), pregnenolone 16α-carbonitrile (PCN), dimethyl sulfoxide (DMSO), and phenobarbital (PB) were obtained from Sigma-Aldrich (St. Louis, MO, USA). The reverse transcription system, dual-luciferase reporter assay system, pGL4.17-Luc, and pGEM-T constructs were supplied by Promega (Madison, WI, USA).
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