The role of acyl carrier protein isoforms from Cuphea lanceolata seeds in the de-novo biosynthesis of medium-chain fatty acids View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1998-05

AUTHORS

Burkhardt Siegfried Schütt, Monika Brummel, Ricardo Schuch, Friedrich Spener

ABSTRACT

To investigate the role of acyl carrier protein (ACP) in determining the fate of the acyl moieties linked to it in the course of de-novo fatty acid biosynthesis in higher plants, we carried out in vitro experiments to reconstitute the fatty acid synthase (FAS) reaction in extracts of spinach (Spinacia oleracea L.) leaves, rape (Brassica napus L.) seeds and Cuphea lanceolata Ait. seeds. The action of two major C. lanceolata ACP isoforms (ACP 1 and ACP 2) compared to ACP from Escherichia coli was monitored by saponification of the corresponding FAS products with subsequent analysis of the liberated fatty acids by high-performance liquid chromatography. In a second approach the preference of the medium-chain acyl-ACP-specific thioesterase (EC 3.1.2.14) of C. lanceolata seeds for the hydrolysis of acyl-ACPs prepared from the three ACP types was investigated. Both ACP isoforms from C. lanceolata seeds supported the synthesis of medium-chain fatty acids in a reconstituted FAS reaction of spinach leaf extracts. Compared to the isoform ACP 1, ACP 2 was more effective in supporting the synthesis of such fatty acids in the FAS reaction of rape seed extracts and caused a higher accumulation of FAS products in all experiments. No preference of the medium-chain thioesterase for one specific ACP isoform was observed. The results indicate that the presence of ACP 2 is essential for the synthesis of decanoic acid in C. lanceolata seeds, and its expression in the phase of accumulation of high levels of this fatty acid provides an additional and highly efficient cofactor for stimulating the FAS reaction. More... »

PAGES

263-268

Journal

TITLE

Planta

ISSUE

2

VOLUME

205

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  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/s004250050320

    DOI

    http://dx.doi.org/10.1007/s004250050320

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1035980090

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/9637071


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