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Title: Artificial covalent linkage of bacterial acyl carrier proteins for fatty acid production

Abstract

Abstract Acyl carrier proteins (ACPs) are essential to the production of fatty acids. In some species of marine bacteria, ACPs are arranged into tandem repeats joined by peptide linkers, an arrangement that results in high fatty acid yields. By contrast, Escherichia coli , a relatively low producer of fatty acids, uses a single-domain ACP. In this work, we have engineered the native E . coli ACP into tandem di- and tri-domain constructs joined by a naturally occurring peptide linker from the PUFA synthase of Photobacterium profundum . The size of these tandem fused ACPs was determined by size exclusion chromatography to be higher (21 kDa, 36 kDa and 141 kDa) than expected based on the amino acid sequence (12 kDa, 24 kDa and 37 kDa, respectively) suggesting the formation of a flexible extended conformation. Structural studies using small-angle X-ray scattering (SAXS), confirmed this conformational flexibility. The thermal stability for the di- and tri-domain constructs was similar to that of the unfused ACP, indicating a lack of interaction between domains. Lastly, E . coli cultures harboring tandem ACPs produced up to 1.6 times more fatty acids than wild-type ACP, demonstrating the viability of ACP fusion as a method to enhance fatty acid yield in bacteria.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1619617
Alternate Identifier(s):
OSTI ID: 1576227
Report Number(s):
BNL-212366-2019-JAAM
Journal ID: ISSN 2045-2322; 16011; PII: 52344
Grant/Contract Number:  
SC0012704
Resource Type:
Published Article
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Name: Scientific Reports Journal Volume: 9 Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United Kingdom
Language:
English
Subject:
60 APPLIED LIFE SCIENCES

Citation Formats

Rullán-Lind, Carlos, Ortiz-Rosario, Melissa, García-González, Andrea, Stojanoff, Vivian, Chorna, Nataliya E., Pietri, Ruth B., and Baerga-Ortiz, Abel. Artificial covalent linkage of bacterial acyl carrier proteins for fatty acid production. United Kingdom: N. p., 2019. Web. doi:10.1038/s41598-019-52344-w.
Rullán-Lind, Carlos, Ortiz-Rosario, Melissa, García-González, Andrea, Stojanoff, Vivian, Chorna, Nataliya E., Pietri, Ruth B., & Baerga-Ortiz, Abel. Artificial covalent linkage of bacterial acyl carrier proteins for fatty acid production. United Kingdom. https://doi.org/10.1038/s41598-019-52344-w
Rullán-Lind, Carlos, Ortiz-Rosario, Melissa, García-González, Andrea, Stojanoff, Vivian, Chorna, Nataliya E., Pietri, Ruth B., and Baerga-Ortiz, Abel. Tue . "Artificial covalent linkage of bacterial acyl carrier proteins for fatty acid production". United Kingdom. https://doi.org/10.1038/s41598-019-52344-w.
@article{osti_1619617,
title = {Artificial covalent linkage of bacterial acyl carrier proteins for fatty acid production},
author = {Rullán-Lind, Carlos and Ortiz-Rosario, Melissa and García-González, Andrea and Stojanoff, Vivian and Chorna, Nataliya E. and Pietri, Ruth B. and Baerga-Ortiz, Abel},
abstractNote = {Abstract Acyl carrier proteins (ACPs) are essential to the production of fatty acids. In some species of marine bacteria, ACPs are arranged into tandem repeats joined by peptide linkers, an arrangement that results in high fatty acid yields. By contrast, Escherichia coli , a relatively low producer of fatty acids, uses a single-domain ACP. In this work, we have engineered the native E . coli ACP into tandem di- and tri-domain constructs joined by a naturally occurring peptide linker from the PUFA synthase of Photobacterium profundum . The size of these tandem fused ACPs was determined by size exclusion chromatography to be higher (21 kDa, 36 kDa and 141 kDa) than expected based on the amino acid sequence (12 kDa, 24 kDa and 37 kDa, respectively) suggesting the formation of a flexible extended conformation. Structural studies using small-angle X-ray scattering (SAXS), confirmed this conformational flexibility. The thermal stability for the di- and tri-domain constructs was similar to that of the unfused ACP, indicating a lack of interaction between domains. Lastly, E . coli cultures harboring tandem ACPs produced up to 1.6 times more fatty acids than wild-type ACP, demonstrating the viability of ACP fusion as a method to enhance fatty acid yield in bacteria.},
doi = {10.1038/s41598-019-52344-w},
journal = {Scientific Reports},
number = 1,
volume = 9,
place = {United Kingdom},
year = {Tue Nov 05 00:00:00 EST 2019},
month = {Tue Nov 05 00:00:00 EST 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1038/s41598-019-52344-w

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