Host cells and methods for production of isobutanol

A technology of host cells and recombinant host cells, which is applied in the field of recombinant host cells and can solve problems such as high price and non-environmental protection

Active Publication Date: 2014-05-28
BUTAMAXTM ADVANCED BIOFUELS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods use starting materials derived from petrochem...

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  • Host cells and methods for production of isobutanol
  • Host cells and methods for production of isobutanol
  • Host cells and methods for production of isobutanol

Examples

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example 1

[0208] A biodiversity screen for KARI-encoding genes from various bacterial and fungal species is described in Example 1, showing suitable KARIs for isobutanol production. Using the present invention, those skilled in the art should readily be able to identify other suitable polypeptides having KARI activity.

[0209] Sequences of other polynucleotides, genes and / or polypeptides can be identified from the literature and from bioinformatics databases well known to those of skill using the sequences disclosed herein and available in the art. For example, such sequences can be identified by BLAST searches of publicly available databases with the polynucleotide or polypeptide sequences provided herein. In such methods, the identity can be based on the Clustal W alignment method using the default parameters of GAP PENALTY=10, GAP LENGTHPENALTY=0.1 and a protein weight matrix of the Gonnet 250 series.

[0210] In addition, the polynucleotide or polypeptide sequences disclosed herein ...

example

[0460] The invention will be further defined in the following examples. It should be understood that these Examples, while indicating preferred embodiments of the invention, are given by way of illustration only. Through the above discussion and these examples, those skilled in the art can ascertain the essential characteristics of the present invention, and without departing from the spirit and scope of the present invention, various changes and modifications can be made to the present invention to adapt to various applications and conditions .

[0461] general method :

[0462] Standard recombinant DNA and molecular cloning techniques used in the examples are well known in the art and described in: Sambrook, J., Fritsch, E.F. and Maniatis, T., Molecular Cloning: A Laboratory Manual, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y., 1989, T.J. Silhavy, M.L; Bennan and L.W. Enquist, Experiments with Gene Fusions, Cold Spring Harbor Laboratory, Cold Spring Harbor...

example 2

[0490] Screening of the KARI diversity collection for isobutanol production

[0491] The various KARI genes were evaluated based on their "effective yield" in yeast. The effective yield is measured after a certain period of growth (for example, 48 hours) under progressive oxygen-limited conditions. Yeast biomass at 1OD 600 The yeast cells are equivalent to 0.3g / L to calculate the assumption.

[0492] Yeast isobutanol pathway strains carrying different KARI genes were inoculated into 10 ml of SEG-Ura, His medium with 0.2% glucose and 0.2% ethanol and allowed to grow aerobically at 30°C overnight to about 2OD. The culture was centrifuged and a portion of the cells resuspended in SEG-Ura, His (2% glucose, 1% ethanol) in a 125ml shake flask to an initial OD of 0.4 in a total volume of 25ml 600 . The shake flasks were closed with screw-on solid plastic caps and cultures were grown in the flasks under progressively oxygen-limited conditions with minimal air and oxygen exchange...

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Abstract

Provided herein are recombinant yeast host cells and methods for their use for production of isobutanol. Yeast host cells provided comprise an isobutanol biosynthetic pathway and at least one of reduced or eliminated aldehyde dehydrogenase activity, reduced or eliminated acetolactate reductase activity; or a heterologous polynucleotide encoding a polypeptide having ketol-acid reductoisomerase activity.

Description

[0001] Government License Rights [0002] This invention was made with United States Government support under Contract No. DE-AR0000006 awarded by the Department of Energy. The US Government has certain rights in this invention. technical field [0003] The present invention relates to recombinant host cells and methods for the fermentative production of isobutanol. [0004] Cross References to Related Applications [0005] This patent application claims U.S. Patent Applications 61 / 472,484 (filed April 6, 2011), 61 / 467,261 (filed March 24, 2011), 61 / 472,487 (filed 6 April 2011), 61 / 467,271 (filed 24 March 2011), 61 / 570,513 (filed 14 December 2011), 61 / 467,249 (filed 24 March 2011), Priority claims of 61 / 472,497 (filed April 6, 2011) and 61 / 472,474 (filed April 6, 2011), each of which is incorporated herein by reference in its entirety. [0006] References to Sequence Listings Submitted Electronically via EFS-WEB [0007] The contents of the electronically submitted S...

Claims

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Application Information

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IPC IPC(8): C12N15/61C12N15/53C12N15/63C12P7/16C12P7/52
CPCC12N15/81C12P7/16C12N1/38C12N9/0006C12P7/42Y02E50/10C12N15/815C12N15/52C12N15/63C12P7/52Y02P20/52
Inventor L.C.安东尼K.J.吉布森H.何L.L.黃D.P.奥基弗A.L.克鲁科伯格Y.李L.A.马格基奥-哈尔J.麦塞瓦恩M.J.内尔森R.帕特奈克S.C.罗斯曼
Owner BUTAMAXTM ADVANCED BIOFUELS
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