Cited by 106biodegradable polymer synthesis and propertiesEnzyme Catalysis and ImmobilizationAnalytical Chemistry and Chromatography

Bacterial Poly(hydroxyalkanoates) as a Source of Chiral Hydroxyalkanoic Acids

Ren, Qun, Grubelnik, Andreas, Hoerler, Mirjam, Ruth, Katinka, Hartmann, René, Felber, Helene, Zinn, Manfred·2005·Biomacromolecules

Abstract

Polyhydroxyalkanoates (PHA) are polyesters of various hydroxyalkanoates accumulated in numerous bacteria. All of the monomeric units of PHA are enantiomerically pure and in R-configuration. R-Hydroxyalkanoic acids can be widely used as chiral starting materials in fine chemical, pharmaceutical and medical industries. In this study, we established an efficient method for the production of chiral hydroxyalkanoic acid monomers from PHA. Pseudomonas putida cells containing PHA were resuspended in phosphate buffer at different pH. We observed that the optimal initial pH for intracellular PHA degradation and monomer release was at pH 8-11 with pH 11 as the best. At initial pH 11, PHA containing 3-hydroxyoctanoic acid and 3-hydroxyhexanoic acid was degraded with an efficiency of over 90% (w/w) in 9 h, and the yield of the corresponding monomers was also over 90%. Under the same conditions, unsaturated monomers were also effectively produced from PHA containing 3-hydroxy-6-heptenoic acid, 3-hydroxy-8-nonenoic acid, and 3-hydroxy-10-undecenoic acid. The monomers (e.g., 3-hydroxyoctanoic acid) were further isolated using solid phase extraction and purified on reversed phase semipreparative liquid chromatography. We confirmed that the purified 3-hydroxyoctanoic acid monomer has exclusively the R-configuration.

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Crossref · 10.1021/bm050187s

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  • Ren et al. extended the concept to a broader range of PHAs, allowing synthesis of a variety of R-hydroxyalkanoic acids whose structures depend on the parent PHA.

    “Ren et al. later extended this concept to a broader range of PHAs, allowing for the synthesis of a variety of R-hydroxyalkanoic acids, the structures of which depend on the parent PHA.490”

    From Catalysis as an Enabling Science for Sustainable Polymers (2018) · cites this paper as [490]

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Authors
Ren, Q., Grubelnik, A., Hoerler, M., Ruth, K., Hartmann, R., Felber, H., & Zinn, M.
Affiliations
ETH Zurich (CH)
Corresponding author
Ren, Qun
Venue
Biomacromolecules
Published
2005-05-26
Volume
6
Issue
4
Pages
2290-2298
ISSN
  • 1525-7797 (ISSN-L)
  • 1526-4602
OpenAlex
W2031434733
Cited by
106
References
32
Citations by year
2025: 4 · 2024: 2 · 2023: 3 · 2022: 5 · 2021: 4 · 2020: 1 · 2019: 6 · 2018: 5 · 2017: 4 · 2016: 4 · 2015: 5 · 2014: 8 · 2013: 5 · 2012: 7
FWCI
2.55
Type
journal article
Language
en
Open access
closed
Locations
  • Biomacromolecules (publishedVersion)
  • PubMed (publishedVersion)
  • DORA Eawag (Swiss Federal Institute of Aquatic Science and Technology (Eawag)) (submittedVersion)
  • DORA Empa (Swiss Federal Laboratories for Materials Science and Technology (Empa)) (submittedVersion)
Topics
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Enzyme Catalysis and Immobilization
  • Physical Sciences › Chemistry › Spectroscopy › Analytical Chemistry and Chromatography
Keywords
polyhydroxyalkanoates, monomer release, pH effect, Pseudomonas putida, unsaturated monomers, enantiomeric purity, solid-phase extraction
MeSH terms
Acids, Alkanes, Hydrogen-Ion Concentration, Kinetics, Stereoisomerism, Water, Reproducibility of Results, Pseudomonas putida

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