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03/20/08 - USPTO Class 514 |  81 views | #20080070829 | Prev - Next | About this Page  514 rss/xml feed  monitor keywords

Family of pesticidal proteins and methods for their use

USPTO Application #: 20080070829
Title: Family of pesticidal proteins and methods for their use
Abstract: Compositions and methods for conferring pesticidal activity to bacteria, plants, plant cells, tissues and seeds are provided. Compositions comprising a coding sequence for pesticidal polypeptides are provided. The coding sequences can be used in DNA constructs or expression cassettes for transformation and expression in plants and bacteria. Compositions also comprise transformed bacteria, plants, plant cells, tissues, and seeds. In particular, isolated pesticidal nucleic acid molecules are provided. Additionally, amino acid sequences corresponding to the polynucleotides are encompassed. In particular, the present invention provides for isolated nucleic acid molecules comprising nucleotide sequences encoding the amino acid sequence shown in SEQ ID NO:2, 4, 6, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37 or 61, the nucleotide sequence set forth in SEQ ID NO:1, 3, 5, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, or 60, or the nucleotide sequence deposited in a bacterial host as Accession No. NRRL B-30961, B-30955, B-30956, B-30957, B-30958, B-30942, B-30939, B-30941, B-50047, B-50047, B-30959, B-30960, B-30943, B-50048, or B-50048, as well as variants and fragments thereof. (end of abstract)



Agent: Alston & Bird LLP - Charlotte, NC, US
Inventors: Nadine Carozzi, Michael G. Koziel, Nicholas B. Duck, Nalini M. Desai, Rong Guo, Daniel John Tomso, Rebekah Deter, Tracy Hargiss
USPTO Applicaton #: 20080070829 - Class: 514002000 (USPTO)

Related Patent Categories: Drug, Bio-affecting And Body Treating Compositions, Designated Organic Active Ingredient Containing (doai), Peptide Containing (e.g., Protein, Peptones, Fibrinogen, Etc.) Doai

Family of pesticidal proteins and methods for their use description/claims


The Patent Description & Claims data below is from USPTO Patent Application 20080070829, Family of pesticidal proteins and methods for their use.

Brief Patent Description - Full Patent Description - Patent Application Claims
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CROSS REFERENCE TO RELATED APPLICATION

[0001] This application claims the benefit of U.S. Provisional Application Ser. Nos. 60/814,007, filed Jun. 15, 2006; 60/813,859, filed Jun. 15, 2006; 60/814,420, filed Jun. 16, 2006; 60/814,212, filed Jun. 16, 2006; and 60/814,989, filed Jun. 20, 2006, the contents of which are herein incorporated by reference in their entirety.

REFERENCE TO SEQUENCE LISTING SUBMITTED ELECTRONICALLY

[0002] The official copy of the sequence listing is submitted electronically via EFS-Web as an ASCII formatted sequence listing with a file named "329211_SequenceListing.txt", created on Jun. 14, 2007, and having a size of 305 kilobytes and is filed concurrently with the specification. The sequence listing contained in this ASCII formatted document is part of the specification and is herein incorporated by reference in its entirety.

FIELD OF THE INVENTION

[0003] This invention relates to the field of molecular biology. Provided are novel genes that encode pesticidal proteins. These proteins and the nucleic acid sequences that encode them are useful in preparing pesticidal formulations and in the production of transgenic pest-resistant plants.

BACKGROUND OF THE INVENTION

[0004] Bacillus thuringiensis is a Gram-positive spore forming soil bacterium characterized by its ability to produce crystalline inclusions that are specifically toxic to certain orders and species of insects, but are harmless to plants and other non-targeted organisms. For this reason, compositions including Bacillus thuringiensis strains or their insecticidal proteins can be used as environmentally-acceptable insecticides to control agricultural insect pests or insect vectors for a variety of human or animal diseases.

[0005] Crystal (Cry) proteins (delta-endotoxins) from Bacillus thuringiensis have potent insecticidal activity against predominantly Lepidopteran, Dipteran, and Coleopteran larvae. These proteins also have shown activity against Hymenoptera, Homoptera, Phthiraptera, Mallophaga, and Acari pest orders, as well as other invertebrate orders such as Nemathelminthes, Platyhelminthes, and Sarcomastigorphora (Feitelson (1993) The Bacillus Thuringiensis family tree. In Advanced Engineered Pesticides, Marcel Dekker, Inc., New York, N.Y.) These proteins were originally classified as CryI to CryV based primarily on their insecticidal activity. The major classes were Lepidoptera-specific (I), Lepidoptera- and Diptera-specific (II), Coleoptera-specific (III), Diptera-specific (IV), and nematode-specific (V) and (VI). The proteins were further classified into subfamilies; more highly related proteins within each family were assigned divisional letters such as Cry1A, Cry1B, Cry1C, etc. Even more closely related proteins within each division were given names such as Cry1C1, Cry1C2, etc.

[0006] A new nomenclature was recently described for the Cry genes based upon amino acid sequence homology rather than insect target specificity (Crickmore et al. (1998) Microbiol. Mol. Biol. Rev. 62:807-813). In the new classification, each toxin is assigned a unique name incorporating a primary rank (an Arabic number), a secondary rank (an uppercase letter), a tertiary rank (a lowercase letter), and a quaternary rank (another Arabic number). In the new classification, Roman numerals have been exchanged for Arabic numerals in the primary rank. Proteins with less than 45% sequence identity have different primary ranks, and the criteria for secondary and tertiary ranks are 78% and 95%, respectively.

[0007] The crystal protein does not exhibit insecticidal activity until it has been ingested and solubilized in the insect midgut. The ingested protoxin is hydrolyzed by proteases in the insect digestive tract to an active toxic molecule. (Hofte and Whiteley (1989) Microbiol. Rev. 53:242-255). This toxin binds to apical brush border receptors in the midgut of the target larvae and inserts into the apical membrane creating ion channels or pores, resulting in larval death.

[0008] Delta-endotoxins generally have five conserved sequence domains, and three conserved structural domains (see, for example, de Maagd et al. (2001) Trends Genetics 17:193-199). The first conserved structural domain consists of seven alpha helices and is involved in membrane insertion and pore formation. Domain II consists of three beta-sheets arranged in a Greek key configuration, and domain III consists of two antiparallel beta-sheets in "jelly-roll" formation (de Maagd et al., 2001, supra). Domains II and III are involved in receptor recognition and binding, and are therefore considered determinants of toxin specificity.

[0009] Because of the devastation that insects can confer, and the improvement in yield by controlling insect pests, there is a continual need to discover new forms of pesticidal toxins.

SUMMARY OF INVENTION

[0010] Compositions and methods for conferring pesticidal activity to bacteria, plants, plant cells, tissues and seeds are provided. Compositions include nucleic acid molecules encoding sequences for pesticidal and insectidal polypeptides, vectors comprising those nucleic acid molecules, and host cells comprising the vectors. Compositions also include the pesticidal polypeptide sequences and antibodies to those polypeptides. The nucleotide sequences can be used in DNA constructs or expression cassettes for transformation and expression in organisms, including microorganisms and plants. The nucleotide or amino acid sequences may be synthetic sequences that have been designed for expression in an organism including, but not limited to, a microorganism or a plant. Compositions also comprise transformed bacteria, plants, plant cells, tissues, and seeds.

[0011] In particular, isolated nucleic acid molecules are provided that encode a pesticidal protein. Additionally, amino acid sequences corresponding to the pesticidal protein are encompassed. In particular, the present invention provides for an isolated nucleic acid molecule comprising a nucleotide sequence encoding the amino acid sequence shown in SEQ ID NO:2, 4, 6, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37 or 61, a nucleotide sequence set forth in SEQ ID NO:1, 3, 5, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, or 60, or the delta-endotoxin nucleotide sequence of the DNA insert of the plasmid deposited in a bacterial host as Accession No. NRRL B-30961, B-30955, B-30956, B-30957, B-30958, B-30942, B-30939, B-30941, B-50047, B-50047, B-30959, B-30960, B-30943, B-50048, or B-50048, as well as variants and fragments thereof. Nucleotide sequences that are complementary to a nucleotide sequence of the invention, or that hybridize to a sequence of the invention are also encompassed.

[0012] Methods are provided for producing the polypeptides of the invention, and for using those polypeptides for controlling or killing a lepidopteran, coleopteran, nematode, or dipteran pest. Methods and kits for detecting the nucleic acids and polypeptides of the invention in a sample are also included.

[0013] The compositions and methods of the invention are useful for the production of organisms with enhanced pest resistance or tolerance. These organisms and compositions comprising the organisms are desirable for agricultural purposes. The compositions of the invention are also useful for generating altered or improved proteins that have pesticidal activity, or for detecting the presence of pesticidal proteins or nucleic acids in products or organisms.

DESCRIPTION OF FIGURES

[0014] FIG. 1 shows an alignment of AXMI-022 with the Iota1b from Clostridium perfringens (SEQ ID NO:49), Isp1A from Brevibacillus laterosporus (SEQ ID NO:50), Isp1B from Brevibacillus laterosporus (SEQ ID NO:51), Vip1Ab from Bacillus thuringiensis (SEQ ID NO:52), and Vip1Ac from Bacillus thuringiensis (SEQ ID NO:53). The alignment shows the most highly conserved amino acid residues highlighted in black, and highly conserved amino acid residues highlighted in gray.

[0015] FIG. 2 shows an alignment of AXMI-022 with Vip1Ab (SEQ ID NO:52). The alignment shows the most highly conserved amino acid residues highlighted in black, and highly conserved amino acid residues highlighted in gray.

[0016] FIG. 3 shows an alignment of AXMI-022 with Cry 37Aa1 from Bacillus thuringiensis (SEQ ID NO:54). The alignment shows the most highly conserved amino acid residues highlighted in black, and highly conserved amino acid residues highlighted in gray.

[0017] FIG. 4 shows an alignment of AXMI-023 with the Vip2 pesticidal protein (SEQ ID NO:55), Isp2a from Brevibacillus laterosporus (SEQ ID NO:56) and Iota toxin component Ia from Clostridium perfringens (SEQ ID NO:57). The alignment shows the most highly conserved amino acid residues highlighted in black, and highly conserved amino acid residues highlighted in gray.

DETAILED DESCRIPTION

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