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Title: Inducible overexpression of the FUM1 gene in saccharomyces cerevisiae: Localization of fumarase and efficient fumaric acid bioconversion to L-Malic acid

Abstract

Cloning of the Saccharomyces cerevisiae FUM1 gene downstream of the strong GAL10 promoter resulted in inducible overexpression of fumarase in the yeast. The overproducing strain exhibited efficient bioconversion of fumaric acid to L-malic acid with an apparent conversion value of 88% and a conversion rate of 80.4 mmol of fumaric acid/h per g of cell wet weight, both of which are much higher than parameters known for industrial bacterial strains. The only product of the conversion reaction was L-malic acid, which was essentially free of the unwanted by-product succinic acid. The GAL10 promoter situated upstream of a promoterless FUM1 gene led to production and correct distribution of the two fumarase isoenzyme activities between cytosolic and mitochondrial subcellular fractions. The amino-terminal sequence of fumarase contains the mitochondrial signal sequence since (i) 92 of 463 amino acid residues from the amino terminus of fumarase are sufficient to localize fumarase-lacZ fusions to mitochondria and (ii) fumarase and fumarase-lacZ fusions lacking the amino-terminal sequence are localized exclusively in the cytosol. The possibility that both mitochondrial and cytosolic fumarases are derived from the same initial translation product is discussed.

Authors:
; ; ;  [1]
  1. The Hebrew Univ., Jerusalem (Israel)
Publication Date:
OSTI Identifier:
6273188
Resource Type:
Journal Article
Journal Name:
Applied and Environmental Microbiology; (USA)
Additional Journal Information:
Journal Volume: 56:9; Journal ID: ISSN 0099-2240
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; HYDRO-LYASES; DNA-CLONING; MALIC ACID; BIOSYNTHESIS; BIOCONVERSION; FUMARIC ACID; MOLECULAR BIOLOGY; SACCHAROMYCES CEREVISIAE; CARBON-OXYGEN LYASES; CARBOXYLIC ACIDS; CLONING; DICARBOXYLIC ACIDS; DNA HYBRIDIZATION; ENZYMES; EUMYCOTA; FUNGI; HYBRIDIZATION; HYDROXY ACIDS; LYASES; MICROORGANISMS; ORGANIC ACIDS; ORGANIC COMPOUNDS; PLANTS; SACCHAROMYCES; SYNTHESIS; YEASTS; 550200* - Biochemistry

Citation Formats

Peleg, Y, Rokem, J S, Goldberg, I, and Pines, O. Inducible overexpression of the FUM1 gene in saccharomyces cerevisiae: Localization of fumarase and efficient fumaric acid bioconversion to L-Malic acid. United States: N. p., 1990. Web.
Peleg, Y, Rokem, J S, Goldberg, I, & Pines, O. Inducible overexpression of the FUM1 gene in saccharomyces cerevisiae: Localization of fumarase and efficient fumaric acid bioconversion to L-Malic acid. United States.
Peleg, Y, Rokem, J S, Goldberg, I, and Pines, O. 1990. "Inducible overexpression of the FUM1 gene in saccharomyces cerevisiae: Localization of fumarase and efficient fumaric acid bioconversion to L-Malic acid". United States.
@article{osti_6273188,
title = {Inducible overexpression of the FUM1 gene in saccharomyces cerevisiae: Localization of fumarase and efficient fumaric acid bioconversion to L-Malic acid},
author = {Peleg, Y and Rokem, J S and Goldberg, I and Pines, O},
abstractNote = {Cloning of the Saccharomyces cerevisiae FUM1 gene downstream of the strong GAL10 promoter resulted in inducible overexpression of fumarase in the yeast. The overproducing strain exhibited efficient bioconversion of fumaric acid to L-malic acid with an apparent conversion value of 88% and a conversion rate of 80.4 mmol of fumaric acid/h per g of cell wet weight, both of which are much higher than parameters known for industrial bacterial strains. The only product of the conversion reaction was L-malic acid, which was essentially free of the unwanted by-product succinic acid. The GAL10 promoter situated upstream of a promoterless FUM1 gene led to production and correct distribution of the two fumarase isoenzyme activities between cytosolic and mitochondrial subcellular fractions. The amino-terminal sequence of fumarase contains the mitochondrial signal sequence since (i) 92 of 463 amino acid residues from the amino terminus of fumarase are sufficient to localize fumarase-lacZ fusions to mitochondria and (ii) fumarase and fumarase-lacZ fusions lacking the amino-terminal sequence are localized exclusively in the cytosol. The possibility that both mitochondrial and cytosolic fumarases are derived from the same initial translation product is discussed.},
doi = {},
url = {https://www.osti.gov/biblio/6273188}, journal = {Applied and Environmental Microbiology; (USA)},
issn = {0099-2240},
number = ,
volume = 56:9,
place = {United States},
year = {Sat Sep 01 00:00:00 EDT 1990},
month = {Sat Sep 01 00:00:00 EDT 1990}
}