Vectors and promoter fragments.

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Vectors and promoter fragments. Vectors and promoter fragments. (A) Targeting/tagging backbone vectors pRS426PVG/pnit-6 and pRS426PVG/ptcu-1. Yeast/E. coli shuttle vector pRS426PVG (S. Ouyang, I. E. Cabrera, A. J. Campbell, K. A. Borkovich, unpublished data) is the backbone for both constructs. Both vectors confer uracil prototrophy to ura3 yeast mutants (URA3) and ampicillin resistance (ApR) in E. coli. pRS426PVG/ptcu-1 vectors contain fragments upstream of the tcu-1 ORF, whereas the pRS426PVG/pnit-6 group of vectors contain nit-6 upstream fragments. Both sets of vectors have the 5′ and 3′ flanking regions for the N. crassa pan-2 ORF (black arrows) surrounding the tcu-1 or nit-6 promoter fragment (violet arrow), a multiple cloning sequence (MCS; black bar), a 5-glycine linker (5XGly; gray bar), a V5 peptide tag (V5-Tag; black bar), the GFP gene (GFP; green arrow) and the bar gene (blue shading), conferring resistance to phosphinothricin in N. crassa (bar). The 5′ pan-2 flank extends from 1 kb upstream to the sequence just before the ATG, whereas the 3′ flank begins with the sequence just beyond the stop codon and extends 1 kb downstream. Other abbreviations: P(LAC), lac promoter; 2 MICRON, yeast 2 micrometer origin of replication; F1 ORI, origin of replication in E. coli. (B) Schematic representation of promoter fragments from nit-6 and tcu-1 cloned in the vectors. The regions 0.5, 1.0, and 1.5 kb upstream of the tcu-1 or nit-5 ORF were amplified using PCR and inserted into pRS426PVG using yeast recombinational cloning. The orientation of the promoter fragments relative to the MCS, 5XGly linker, V5 peptide tag, and GFP is shown. Shouqiang Ouyang et al. G3 2015;5:1899-1908 ©2015 by Genetics Society of America