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Microorganisms for the production of adipic acid and other compounds

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Microorganisms for the production of adipic acid and other compounds


The invention provides a non-naturally occurring microbial organism having an adipate, 6-aminocaproic acid or caprolactam pathway. The microbial organism contains at least one exogenous nucleic acid encoding an enzyme in the respective adipate, 6-aminocaproic acid or caprolactam pathway. The invention additionally provides a method for producing adipate, 6-aminocaproic acid or caprolactam. The method can include culturing an adipate, 6-aminocaproic acid or caprolactam producing microbial organism, where the microbial organism expresses at least one exogenous nucleic acid encoding an adipate, 6-aminocaproic acid or caprolactam pathway enzyme in a sufficient amount to produce the respective product, under conditions and for a sufficient period of time to produce adipate, 6-aminocaproic acid or caprolactam.

Browse recent Genomatica, Inc. patents - San Diego, CA, US
Inventors: Anthony P. Burgard, Priti Pharkya, Robin E. Osterhout
USPTO Applicaton #: #20120264179 - Class: 435121 (USPTO) - 10/18/12 - Class 435 
Chemistry: Molecular Biology And Microbiology > Micro-organism, Tissue Cell Culture Or Enzyme Using Process To Synthesize A Desired Chemical Compound Or Composition >Preparing Heterocyclic Carbon Compound Having Only O, N, S, Se, Or Te As Ring Hetero Atoms >Nitrogen As Only Ring Hetero Atom

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The Patent Description & Claims data below is from USPTO Patent Application 20120264179, Microorganisms for the production of adipic acid and other compounds.

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This application is a continuation of U.S. application Ser. No. 13/288,699, filed Nov. 3, 2011, which is a continuation of U.S. application Ser. No. 13/088,256, filed Apr. 15, 2011, now U.S. Pat. No. 8,062,871, issued Nov. 22, 2011, which is a continuation of U.S. application Ser. No. 12/875,084, filed Sep. 2, 2010, now U.S. Pat. No. 8,088,607, issued Jan. 3, 2012, which is a continuation of U.S. application Ser. No. 12/413,355, filed Mar. 27, 2009, now U.S. Pat. No. 7,799,545, issued Sep. 21, 2010, which claims the benefit of priority of U.S. Provisional Ser. No. 61/040,059, filed Mar. 27, 2008, each of which the entire contents are incorporated herein by reference.

BACKGROUND OF THE INVENTION

The present invention relates generally to biosynthetic processes, and more specifically to organisms having adipic acid, 6-aminocaproic acid and caprolactam biosynthetic capability.

Adipic acid, a dicarboxylic acid, with molecular weight of 146.14, is a compound of commercial significance. Its major use is to produce nylon 6,6, a linear polyamide made by condensing adipic acid with hexamethylene diamine that is primarily employed for manufacturing different kinds of fibers. Other uses of adipic acid include its use in plasticizers, unsaturated polyesters, and polyester polyols. Additional uses include for production of polyurethane, lubricant components, and as a food ingredient as a flavorant and gelling aid.

Historically, adipic acid was prepared from various fats using oxidation. The current commercial processes for adipic acid synthesis rely on the oxidation of KA oil, a mixture of cyclohexanone, the ketone or K component, and cyclohexanol, the alcohol or A component, or of pure cyclohexanol using an excess of strong nitric acid. There are several variations of this theme which differ in the routes for production of KA or cyclohexanol. For example, phenol is an alternative raw material in KA oil production, and the process for the synthesis of adipic acid from phenol has been described. The other versions of this process tend to use oxidizing agents other than nitric acid, such as hydrogen peroxide, air or oxygen.

Caprolactam is an organic compound which is a lactam of 6-aminohexanoic acid (ε-aminohexanoic acid, aminocaproic acid). It can alternatively be considered cyclic amide of caproic acid. The primary industrial use of caprolactam is as a monomer in the production of nylon-6. Most of the caprolactam is synthesised from cyclohexanone via an oximation process using hydroxylammonium sulfate followed by catalytic rearrangement using the Beckmann rearrangement process step.

Thus, there exists a need for alternative methods for effectively producing commercial quantities of compounds such as adipic acid and carpolactam. The present invention satisfies this need and provides related advantages as well.

SUMMARY

OF INVENTION

The invention provides a non-naturally occurring microbial organism having an adipate, 6-aminocaproic acid or caprolactam pathway. The microbial organism contains at least one exogenous nucleic acid encoding an enzyme in the respective adipate, 6-aminocaproic acid or caprolactam pathway. The invention additionally provides a method for producing adipate, 6-aminocaproic acid or caprolactam. The method can include culturing an adipate, 6-aminocaproic acid or caprolactam producing microbial organism, where the microbial organism expresses at least one exogenous nucleic acid encoding an adipate, 6-aminocaproic acid or caprolactam pathway enzyme in a sufficient amount to produce the respective product, under conditions and for a sufficient period of time to produce adipate, 6-aminocaproic acid or caprolactam.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows an exemplary pathway for adipate degradation in the peroxisome of Penicillium chrysogenum.

FIG. 2 shows an exemplary pathway for adipate formation via a reverse degradation pathway. Several options are provided for the final conversion of adipyl-CoA to adipate.

FIG. 3 shows an exemplary pathway for adipate formation via the 3-oxoadipate pathway.

FIG. 4 show the similar enzyme chemistries of the last three steps of the 3-oxoadipate pathway for adipate synthesis and the reductive TCA cycle.

FIG. 5 shows an exemplary pathway for synthesis of adipic acid from glucose via cis,cis-muconic acid. Biosynthetic intermediates (abbreviations): D-erythrose 4-phosphate (E4P), phosphoenolpyruvic acid (PEP), 3-deoxy-D-arabinoheptulosonic acid 7-phosphate (DAHP), 3-dehydroquinic acid (DHQ), 3-dehydroshikimic acid (DHS), protocatechuic acid (PCA). Enzymes (encoding genes) or reaction conditions: (a) DAHP synthase (aroFFBR), (b) 3-dehydroquinate synthase (aroB), (c) 3-dehydroquinate dehydratase (aroD), (d) DHS dehydratase (aroZ), (e) protocatechuate decarboxylase (aroY), (f) catechol 1,2-dioxygenase (catA), (g) 10% Pt/C, H2, 3400 kPa, 25° C. Figure taken from Niu et al., Biotechnol. Prog. 18:201-211 (2002)).

FIG. 6 shows an exemplary pathway for adipate synthesis via alpha-ketoadipate using alpha-ketoglutarate as a starting point.

FIG. 7 shows an exemplary pathway for synthesis of adipate using lysine as a starting point.

FIG. 8 shows an exemplary caprolactam synthesis pathway using adipyl-CoA as a starting point.

FIG. 9 shows exemplary adipate synthesis pathways using alpha-ketoadipate as a starting point.

DETAILED DESCRIPTION

OF THE INVENTION

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stats Patent Info
Application #
US 20120264179 A1
Publish Date
10/18/2012
Document #
13452642
File Date
04/20/2012
USPTO Class
435121
Other USPTO Classes
435135, 435142, 435147, 435128, 435130, 43525233, 4352522, 43525231, 43525232, 43525235, 43525234, 4352523, 43525411, 4352542, 43525421, 4352543, 43525423, 435189, 435196, 435191, 536 232, 435193
International Class
/
Drawings
10



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