Cited by 456Polysaccharides Composition and ApplicationsProbiotics and Fermented FoodsBiopolymer Synthesis and Applications

Invited Review: Methods for the Screening, Isolation, and Characterization of Exopolysaccharides Produced by Lactic Acid Bacteria

Open access
Ruas-Madiedo, P., de los Reyes-Gavilán, C.G.·2005·Journal of Dairy Science

Abstract

The ability to produce exopolysaccharides (EPS) is widespread among lactic acid bacteria (LAB), although the physiological role of these molecules has not been clearly established yet. Some EPS confer on LAB a "ropy" character that can be detected in cultures that form long strands when extended with an inoculation loop. When EPS are produced in situ during milk fermentation they can act as natural biothickeners, giving the product a suitable consistency, improving viscosity, and reducing syneresis. In addition, some of these EPS may have beneficial effects on human health. The increasing demand by consumers of novel dairy products requires a better understanding of the effect of EPS on existing products and, at the same time, the search for new EPS-producing strains with desirable properties. The use of genetically modified organisms capable of producing high levels of EPS or newly designed biopolymers is still very limited. Therefore, exploration of the biodiversity of wild LAB strains from natural ecological environments is currently the most suitable approach to search for the desired EPS-phenotype. The screening of ropy strains and the isolation and characterization of EPS responsible for this characteristic have led to the application over the past years of a wide variety of techniques. This review summarizes the available information on methods and procedures used for research on this topic. The information provided deals with methods for screening of EPS-producing LAB, detection of the ropy phenotype, and the physicochemical and structural characterization of these molecules, including parameters related to their viscosifying properties. To our knowledge, this is the first compilation of methods available for the study of EPS produced by LAB.

Integrity signals

Registry

Crossref · 10.3168/jds.s0022-0302(05)72750-8

Cites

129 of 129 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The gravimetric method, such as weighing the dry mass of the purified polysaccharide, is the most straightforward approach for quantifying EPS yield.

    “Gravimetric method, such as weighing the dry mass of the purified polysaccharide, is the most straightforward approach for quantifying EPS yield [58].”
  • Membrane filtration techniques such as microfiltration, ultrafiltration and/or diafiltration have been used as a preceding step to EPS purification.

    “As a preceding step to EPS purification, membrane filtration techniques such as microfiltration, ultrafiltration and/or diafiltration have also been used [50,58,70,101].”
  • Ethanol is commonly used for precipitation of EPS, although isopropanol, acetone or a mixture of acetone and ethanol have also been used.

    “For the following precipitation of EPS, ethanol is commonly used [27,42,43,50,55,58,99], although isopropanol [100], acetone [33] or a mixture of acetone and ethanol [101] have been also used.”
  • Proteins can be precipitated with trichloroacetic acid or a combination of trichloroacetic acid and proteases.

    “Then, proteins can be precipitated with trichloroacetic acid (TCA) [27,49,58,70] or a combination of TCA and proteases [97].”
  • Trifluoroacetic acid is the most frequently used acid for hydrolysis of EPS, also because unreacted trifluoroacetic acid can be easily eliminated by evaporation.

    “TFA is the most frequently used acid, also because the unreacted TFA can be easily eliminated by evaporation [58].”

Cites

Flagged first, then by citations

6 of the 135 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Ruas-Madiedo, P., & de los Reyes-Gavilán, C. G.
Venue
Journal of Dairy Science
Published
2005-03
Volume
88
Issue
3
Pages
843-856
ISSN
0022-0302 (ISSN-L)
OpenAlex
W2004400025
Cited by
456
References
135
Citations by year
2026: 19 · 2025: 28 · 2024: 23 · 2023: 30 · 2022: 35 · 2021: 37 · 2020: 31 · 2019: 20 · 2018: 31 · 2017: 19 · 2016: 21 · 2015: 26 · 2014: 25 · 2013: 15 · 2012: 17
FWCI
1.75
Type
journal article
Language
en
Open access
Locations
  • Journal of Dairy Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • FEDER funds
  • Spanish “Plan Nacional de I+D+I”
  • “Fundación Príncipe de Asturias”
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Polysaccharides Composition and Applications
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biopolymer Synthesis and Applications
Keywords
exopolysaccharides, lactic acid bacteria, dairy fermentation, syneresis, dairy products
MeSH terms
Dairy Products, Fermentation, Food Microbiology, Lactobacillus, Polysaccharides, Bacterial, Viscosity, Probiotics, Organisms, Genetically Modified

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review