Microbial Production of Extracellular Polysaccharides from Biomass Sources

Özcan, Emrah; Öner, Ebru Toksoy

doi:10.1007/978-3-319-16298-0_51

Cited by 20 publications

(18 citation statements)

References 101 publications

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“…Those EPSs show a wide variety of different structures, from simple homopolysaccharides such as levan and curdlan to complex heteropolysaccharides composed of many different monomeric sugars such as gellan and xanthan. Moreover, microbial EPS production may involve a mixture of different polymers rather than just one type, such as the three different EPSs (Pel, Psl, and alginate) of Pseudomonas aeruginosa or coproduction of dextran and levan by Leuconostoc mesenteroides (Özcan & Toksoy Öner, ). Table shows some of the most common microbial EPSs in nature.…”

Section: Microbial Fructansmentioning

confidence: 99%

The fructan syndrome: Evolutionary aspects and common themes among plants and microbes

Versluys

Kırtel

Öner

et al. 2017

Plant Cell & Environment

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Fructans are multifunctional fructose-based water soluble carbohydrates found in all biological kingdoms but not in animals. Most research has focused on plant and microbial fructans and has received a growing interest because of their practical applications. Nevertheless, the origin of fructan production, the so-called "fructan syndrome," is still unknown. Why fructans only occur in a limited number of plant and microbial species remains unclear. In this review, we provide an overview of plant and microbial fructan research with a focus on fructans as an adaptation to the environment and their role in (a)biotic stress tolerance. The taxonomical and biogeographical distribution of fructans in both kingdoms is discussed and linked (where possible) to environmental factors. Overall, the fructan syndrome may be related to water scarcity and differences in physicochemical properties, for instance, water retaining characteristics, at least partially explain why different fructan types with different branching levels are found in different species.Although a close correlation between environmental stresses and fructan production is quite clear in plants, this link seems to be missing in microbes. We hypothesize that this can be at least partially explained by differential evolutionary timeframes for plants and microbes, combined with potential redundancy effects.

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Section: Microbial Fructansmentioning

confidence: 99%

The fructan syndrome: Evolutionary aspects and common themes among plants and microbes

Versluys

Kırtel

Öner

et al. 2017

Plant Cell & Environment

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“…LSCs are used in the fermentative production of microbial oligosaccharides and polysaccharides due to their ability to interact with low-cost substitutes of sucrose, e.g., syrups and molasses [7,8].…”

Section: Introductionmentioning

confidence: 99%

The Structure of Sucrose-Soaked Levansucrase Crystals from Erwinia tasmaniensis reveals a Binding Pocket for Levanbiose

Polsinelli

Caliandro

Demitri

et al. 2019

IJMS

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Given its potential role in the synthesis of novel prebiotics and applications in the pharmaceutical industry, a strong interest has developed in the enzyme levansucrase (LSC, EC 2.4.1.10). LSC catalyzes both the hydrolysis of sucrose (or sucroselike substrates) and the transfructosylation of a wide range of acceptors. LSC from the Gram-negative bacterium Erwinia tasmaniensis (EtLSC) is an interesting biocatalyst due to its high-yield production of fructooligosaccharides (FOSs). In order to learn more about the process of chain elongation, we obtained the crystal structure of EtLSC in complex with levanbiose (LBS). LBS is an FOS intermediate formed during the synthesis of longer-chain FOSs and levan. Analysis of the LBS binding pocket revealed that its structure was conserved in several related species. The binding pocket discovered in this crystal structure is an ideal target for future mutagenesis studies in order to understand its biological relevance and to engineer LSCs into tailored products.

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“…Less expensive substrates such as waste or by-products of food processing or agro-industry can also be utilized for EPS production in LAB leading to a significant decrease in production costs. These lower priced substrates are generally either in liquid form such as syrups, molasses, juices, cheese whey, and olive mill wastewater or solid-like lignocellulosic biomass and pomaces (Özcan and Öner, 2015). For example, the common fermentation process known as submerged fermentation is carried out in liquid media.…”

Section: Alternative Low-cost Ingredientsmentioning

confidence: 99%

Cultivation media for lactic acid bacteria used in dairy products

Hayek

Gyawali

Aljaloud

et al. 2019

Journal of Dairy Research

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This review aims to familiarize the reader with research efforts on the cultivation media of lactic acid bacteria (LAB). We have also included a brief discussion on standard ingredients used in LAB media and chemically defined media as related to bacterial growth requirements. Recent research has focused on modifying standard media for the enumeration, differentiation, isolation, and identification of starter cultures and probiotics. Even though large numbers of these media have been developed to serve dairy microbial control, they have failed to provide consistent results. The research consequently points to the need to develop a reliable lactobacilli growth medium for the dairy industry.

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Microbial Production of Extracellular Polysaccharides from Biomass Sources

Cited by 20 publications

References 101 publications

The fructan syndrome: Evolutionary aspects and common themes among plants and microbes

The fructan syndrome: Evolutionary aspects and common themes among plants and microbes

The Structure of Sucrose-Soaked Levansucrase Crystals from Erwinia tasmaniensis reveals a Binding Pocket for Levanbiose

Cultivation media for lactic acid bacteria used in dairy products

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