摘要:
The present invention relates to isolated nucleic acid molecules encoding a type III-secreted bacterial protein capable of modifying a cell death pathway in a plant cell. One aspect of the present invention involves an isolated nucleic acid molecule having a nucleotide sequence that encodes the HopPtoD2 protein of Pseudomonas syringae pv. syringae DC 3000. Expression vectors, host cells, and transgenic plants which include the DNA molecules of the present invention are also disclosed. The nucleic acid molecules of the present invention can be used to impart disease resistance to a plant and to make a plant hypersusceptible to colonization by nonpathogenic bacteria.
摘要:
Isolated and cloned baculovirus genes encoding a polypeptide protein present in the occlusion body of certain baculoviruses such as Trichoplusia ni granulosis virus and Pseudaletia unipuncta granulosis virus Hawaiian strain, said genes possessing a biological activity of enhancing virus infection of host insects by causing rapid degradation of the peritrophic membrane lining the midgut lumen of insects. The invention is also directed to pesticides incorporating said genes, i.e. the purified conserved and enhancing baculovirus proteins herein termed enhancins.
摘要:
A recombinant subunit vaccine for protection dogs against infection caused by canine parvovirus comprising VP-2 protein produced during replication of a recombinant baculovirus in insect tissue culture cells or insects which are a permissive hosts for the replication of selected baculoviruses.
摘要:
This disclosure relates to an isolated and cloned DNA from a granulovirus virus which comprises an amino acid sequence of the viral gene encoding a polypeptide isolated from occlusion bodies of certain baculoviruses and which polypeptide possesses the biological activity of enhancing baculovirus infectivity. Such proteins termed herein as 'enhancins' are found within the viral occlusion body, have a disruptive effect on the insect peritrophic membrane (PM) proteins, and/or interact with the midgut epithelium in such a manner as to permit the increased adsorption, penetration and uptake of virus particles by midgut cells with a concomitant increase in host mortality. Disclosed herein is a recombinant DNA sequence which codes for the enhancin protein of the Helicoverpa armigera granulovirus virus. The DNA sequence is shown in SEQ. ID. NO. :1 and the open reading frame is shown in SEQ. ID. NO.: 1: base pairs 271-2976. The amino acid sequence of the enhancin protein is shown in SEQ. ID. NO.: 2.
摘要:
A method of infecting insects is disclosed; the method utilizes a form of a baculovirus which is highly efficient at establishing infection and is normally destined to become occluded within the polyhedrin or granulin - Pre-occluded Virus (POV). Specifically, the POV as derived from a polyhedrin-minus or granulin-minus (lacking a functional polyhedrin or granulin gene) baculovirus is fed to insect larvae per os resulting in high infection rates. The discovery of the POV form of polyhedrin-minus baculoviruses was essential to our invention of the novel method of infecting insect larvae per os using the POV form of polyhedrin-minus baculovirus, and as such is also disclosed.
摘要:
Micro-organisme procaryotique et son procédé de production, le micro-organisme contenant au moins une partie d'ADN stable dans le chromosome. Les micro-organismes ci-décrits ainsi que leurs descendants sont exempts de restructuration génétique comprenant l'ADN étranger. Dans un mode préférentiel de réalisation on utilise des cyanobactéries. Les micro-organismes sont produits en introduisant dans la cellule un véhicule d'insertion contenant de l'ADN étranger lié entre deux parties d'ADN homologues à des parties adjacentes du chromosome du récepteur.
摘要:
A method for obtaining an immune response to hepatitis B surface antigen (HBsAG) by feeding the antigen in a plant material to an animal that is immunoreceptive to the HBsAg. It has now been discovered that the animal may be made immunoreceptive to HBsAg either by administering the plant material containing HBsAg in conjunction with a suitable adjuvant or by prior primary immunization. When the animal is made immunoreceptive by a prior, e.g. primary, immunization, an immune response to HBsAg may be boosted in the animal by feeding the animal the plant material containing the HBsAg. For example, an animal, e.g. a human, that previously had a positive response to primary immunization against hepatitis B, can have a booster response to HBsAg by feeding the animal the antigen in a plant material. The plant material is a substance comprising a physiologically acceptable plant material, especially potatoes, containing hepatitis B surface antigen (HBsAg). The HBsAg in the plant results from expression by the plant of HBsAg due to genetic alteration.
摘要:
A host microorganism is genetically and stably modified by the insertion in any of its non-essential chromosomal locations a foreign DNA fragment comprising a non-homologous fragment containing a lux AB gene of a selected bioluminescent bacterium such as V. harveyi such that the nonhomologous fragment is stably reproduced as a part of the chromosome of the cells of the host microorganism as they divide in a growth medium and the gene expression of such microorganism triggers the production of luciferase which, in turn emits light in the presence of aldehyde as a measure of gene expression. Both Gram-positive and Gram-negative bacteria are microorganisms which may be modified as aforesaid. X-ray film can be used to quantify the light being emitted from a microorganism through the use of plural droplets containing the same microorganism each with a known and related cell (or plasmid) count.