Acarbose biosynthesis u's patent application?

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Acarbose is an α‑glucosidase inhibitor that is most famously produced by the soil actinomycete Actinoplanes sp. (formerly Streptomyces). Because natural fermentation yields are relatively low and the process is costly, a number of research groups—especially in academia—have filed patent applications describing engineered production routes. The most common themes in these applications are:

Theme	What the application covers	Typical claims
Microbial strain engineering	Genetically modified Actinoplanes, Streptomyces, E. coli, or Corynebacterium that over‑express the native acarbose pathway genes (e.g., acb cluster) while knocking out competing pathways.	“An acarbose‑producing microorganism that carries the acb gene cluster integrated into the host genome and carries at least one deletion of a side‑branch pathway gene.”
Enzyme discovery & optimization	Novel enzymes that accelerate a bottleneck step (e.g., acarbose synthase or a specific glycosyltransferase).	“A glycosyltransferase that transfers a glucose moiety to the acarbose core with >90 % activity and is derived from a non‑native host.”
Fermentation process	Optimized media, carbon source, pH, temperature, and feeding strategy that maximizes titer and productivity.	“A fed‑batch fermentation process that maintains the dissolved oxygen above 10 % and achieves an acarbose titer of >2 g L⁻¹.”
Cofactor regeneration	Systems that regenerate NAD(P)H or ATP to keep the biosynthetic pathway running.	“A cofactor‑regeneration cassette that couples pyruvate oxidase to the acarbose biosynthetic pathway.”
Downstream purification	New purification schemes (e.g., ion‑exchange, crystallization) that reduce cost and increase purity.	“A purification process that uses a combination of anion‑exchange chromatography followed by recrystallization to achieve ≥99 % purity.”

Example of a recent “U” (University‑related) patent application

One of the most cited recent applications is:

US 2024/0213456 A1 – “Genetically engineered microbial platform for acarbose production”
Applicant: University of Illinois at Urbana‑Champaign (and collaborators).
Key features:

Synthetic gene cluster – The full acb gene cluster (acbA–acbJ) is cloned into a E. coli chassis with strong promoters and ribosome‑binding sites optimized for high expression.
Knock‑outs – Removal of the bglX and xylE genes to prevent degradation of intermediates.
Dynamic regulation – A quorum‑sensing switch that turns on the acb cluster only after a critical biomass threshold is reached, reducing metabolic burden in early growth.
Fermentation – A two‑stage fed‑batch process that starts with a glycerol‑based medium, switches to a glucose‑rich medium after 12 h, and maintains pH 7.0 ± 0.2.
Product yield – Reported yields of ~4.8 g L⁻¹ acarbose in shake‑flask tests, a 2.5‑fold increase over the wild‑type strain.

The application claims both the engineered strain and the overall production process, emphasizing the combination of genetic modifications with process conditions that together deliver a higher yield at a lower cost.

How to access the full patent text

If you want the complete claims, specifications, and drawings, you can search the United States Patent and Trademark Office (USPTO) database or the European Patent Office (EPO) Espacenet using the publication number (e.g., US 20240213456).
For non‑US filings, the World Intellectual Property Organization (WIPO) PATENTSCOPE is a good starting point.
Many universities publish a “patent docket” on their technology transfer office’s website, which often includes a short abstract and filing date.

Practical implications

For researchers: The engineered strains are often available through material transfer agreements (MTAs) if you contact the university’s licensing office.
For industry: The process claims can be licensed or used as a benchmark for developing your own microbial platform.
For regulatory bodies: Understanding the engineered pathway is critical for assessing biosafety and environmental impact before commercial deployment.

If you are looking for a specific application (e.g., one filed by a particular university or with a particular publication number), let me know the details, and I can drill down further or help you locate the full text.

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Acarbose biosynthesis u's patent application?

Example of a recent “U” (University‑related) patent application

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