Promoter/leader deletion analysis and plant expression vectors with the Figwort Mosaic Virus (FMV) full length transcript (FLt) promoter containing single or double enhancer domains

作者：Maiti IB^*; Ghosh SK; Gowda S; Kiernan J; Shepherd RJ

来源：Transgenic Research, 1997, 6(2): 143-156.

DOI：10.1023/A:1018477705019

• caulimovirus
• transcriptional enhancer
• expression vectors
• figwort mosaic virus
• 35S promoter
• transgenic plants
• transient expression

The boundaries required for maximal expression from the promoter/leader region of the full length transcript of figwort mosaic virus (FLt promoter) coupled to reporter genes were defined by 5' and 3' deletion analyses. In transient expression assays using protoplasts of Nicotiana edwardsonii, a 314 bp FLt promoter fragment sequence (-249 to +65 from the transcription start site) was sufficient for strong expression activity. Plant expression vectors developed with modified FLt promoters were tested with GUS or CAT as reporter genes in transgenic plants. The FLt promoter is a strong constitutive promoter, with strength comparable to or greater than that of the CaMV 35S promoter. The FLt promoter with its double enhancer domain linked to GUS or CAT reporter genes provides an average 4-fold greater activity than the FLt promoter with a single enhancer domain (-55 to -249 bp upstream fragment) in tests with transgenic plants and in protoplast transient expression assays.

• 出版日期1997-3