SELF PROCESSING PLANTS AND PLANT PARTS

• US 20090320831A1
• Filed: 08/20/2009
• Published: 12/31/2009
• Est. Priority Date: 08/27/2001
• Status: Abandoned Application

• Current Assignee: Syngenta Participations AG (China National Chemical Corporation)
• Original Assignee: Syngenta Participations AG (China National Chemical Corporation)
• Inventors: Chen, Wen, Basu, Shib S., Batie, Christopher J., Kinkema, Mark, Lanahan, Michael B., Craig, Joyce
• Application Number:
  US12/544,546
• Publication Number:
  US 20090320831A1
• Time in Patent Office: Days
• US Class Current: 127/37
• CPC Class Codes: C12N 15/8243 involving biosynthetic or metabolic pathways, i.e. metabolic engineering, e.g. nicotine, caffeine
• CPC Class Codes: C12N 15/8245 involving modified carbohydrate or sugar alcohol metabolism, e.g. starch biosynthesis
• CPC Class Codes: C12N 15/8246 Non-starch polysaccharides, e.g. cellulose, fructans, levans
• CPC Class Codes: C12N 9/2402 hydrolysing O- and S- glycosyl compounds (3.2.1)
• CPC Class Codes: C12N 9/2422 from plant source
• CPC Class Codes: C12N 9/2428 Glucan 1,4-alpha-glucosidase (3.2.1.3), i.e. glucoamylase
• CPC Class Codes: C12N 9/2445 Beta-glucosidase (3.2.1.21)
• CPC Class Codes: C12N 9/2451 acting on alpha-1,6-glucosidic bonds
• CPC Class Codes: C12N 9/2457 Pullulanase (3.2.1.41)
• CPC Class Codes: C12N 9/246 Isoamylase (3.2.1.68)
• CPC Class Codes: C12Y 302/01021 Beta-glucosidase (3.2.1.21)
• CPC Class Codes: C12Y 302/01041 Pullulanase (3.2.1.41)
• CPC Class Codes: C12Y 302/01068 Isoamylase (3.2.1.68)
• CPC Class Codes: Y02E 50/10 Biofuels, e.g. bio-diesel

Abstract

The invention provides polynucleotides, preferably synthetic polynucleotides, which encode processing enzymes that are optimized for expression in plants. The polynucleotides encode mesophilic, thermophilic, or hyperthermophilic processing enzymes, which are activated under suitable activating conditions to act upon the desired substrate. Also provided are “self-processing” transgenic plants, and plant parts, e.g., grain, which express one or more of these enzymes and have an altered composition that facilitates plant and grain processing. Methods for making and using these plants, e.g., to produce food products having improved taste and to produce fermentable substrates for the production of ethanol and fermented beverages are also provided.

Claims

1-265. -265. (canceled)

266. A method of increasing starch recovery from maize seed, the method comprising:

a) steeping transgenic maize seeds comprising at least one cellulase to produce steeped seed;

b) grinding said steeped seed to produce a maize slurry; and

c) obtaining starch from maize seed.

267. The method of claim 266, wherein the seed is steeped at about 0 ppm to about 2000 ppm Sulfur dioxide.

268. The method of claim 266, wherein the seed is steeped at about 37°

C. to about 50°

C.

269. The method of claim 266, wherein the seed is steeped for at least 24 hours.

270. The method of claim 266, wherein the cellulase is an endoglucanase.

271. The method of claim 266, wherein the endoglucanase is a thermostable endoglucanase.

272. The method of claim 266, wherein the cellulase is a cellobiohydrolase.

273. The method of claim 266, wherein said maize slurry further comprises a protease.

274. The method of claim 273, wherein the protease is Bromelain.

275. The method of claim 273, wherein the protease is incorporated into the maize genome and expressed by the plant.

276. The method of claim 273, wherein the cellulase is targeted to any one of the groups consisting of endoplasmic reticulum, vacuole, chloroplast, starch granule, or cell wall of the plant.

277. The method of claim 266, wherein the maize slurry comprises an endoglucanase and a cellobiohydrolase.

a) transforming a maize cell with an expression cassette containing a nuleic acid encoding a potato R1 polypeptide;

a

278. The method of claim 266, wherein the maize slurry comprises an endoglucanase, cellobiohydrolase and a protease.

279. The method of claim 278, wherein the cellobiohydrolase is added exogenously.

280. The method of claim 278, wherein the protease is added exogenously.

281. A method for reducing Sulfur dioxide in a wet milling process, the method comprising:

a) steeping transgenic maize seeds comprising at least one cellulase to produce steeped seed;

b) grinding said steeped seed to produce a maize slurry; and

c) reducing Sulfur dioxide in said wet milling process.