Plant Molecular Biology

, Volume 14, Issue 3, pp 433–443

Characteristics of a strong promoter from figwort mosaic virus: comparison with the analogous 35S promoter from cauliflower mosaic virus and the regulated mannopine synthase promoter

  • Margaret Sanger
  • Steve Daubert
  • Robert M. Goodman
Article

DOI: 10.1007/BF00028779

Cite this article as:
Sanger, M., Daubert, S. & Goodman, R.M. Plant Mol Biol (1990) 14: 433. doi:10.1007/BF00028779
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Abstract

A segment of DNA from the genome of figwort mosaic virus (FMV) strain M3 possesses promoter activity when tested in electroporated protoplasts from, and transgenic plants of, Nicotiana tabacum cv. Xanthi nc. The 1.1 kb DNA segment, designated the ‘34S’ promoter, is derived from a position on the FMV genome comparable to the position on the cauliflower mosaic virus (CaMV) genome containing the 35S promoter. The 34S and 35S promoters show approximately 63% nucleotide homology in the TATA, CCACT, and −18 to +1 domains, but in sequences further upstream the homology drops below 50%. Promoter activities were estimated using β-glucuronidase and neomycin phosphotransferase II reporter gene systems. The activity of the 34S promoter segment approximates that of the 35S promoter in both protoplast transient expression assays and in stably transformed tobacco plants. Truncation of 5′ sequences from the 34S promoter indicates that promoter strength depends upon DNA sequences located several hundred nucleotides upstream from the TATA box. In leaf tissue the 34S promoter is 20-fold more active than the mannopine synthase (MAS) promoter from Agrobacterium tumefaciens T-DNA. The 34S promoter lacks the root-specific and wound-stimulated expression of the MAS promoter, showing relatively uniform root, stem, leaf, and floral activities.

Key words

cauliflower mosaic 35Sfigwort mosaicmannopine synthase inducibilityplant promoters

Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • Margaret Sanger
    • 1
    • 2
  • Steve Daubert
    • 2
  • Robert M. Goodman
    • 1
  1. 1.Calgene Inc.DavisUSA
  2. 2.Department of Plant PathologyUniversity of CaliforniaDavis