Acetan and acetan-like polysaccharides : genetics, biosynthesis, structure, and viscoelasticity

Trček, Janja (author), Dogša, Iztok (author), Accetto, Tomaž (author), Stopar, David (author)

Bacteria produce a variety of multifunctional polysaccharides, including structural, intracellular, and extracellular polysaccharides. They are attractive for the industrial sector due to their natural origin, sustainability, biodegradability, low toxicity, stability, unique viscoelastic properties, stable cost, and supply. When incorporated into different matrices, they may control emulsification, stabilization, crystallization, water release, and encapsulation. Acetan is an important extracellular water-soluble polysaccharide produced mainly by bacterial species of the genera Komagataeibacter and Acetobacter. Since its original description in Komagataeibacter xylinus, acetan-like polysaccharides have also been described in other species of acetic acid bacteria. Our knowledge on chemical composition of different acetan-like polysaccharides, their viscoelasticity, and the genetic basis for their production has expanded during the last years. Here, we review data on acetan biosynthesis, its molecular structure, genetic organization, and mechanical properties. In addition, we have performed an extended bioinformatic analysis on acetan-like polysaccharide genetic clusters in the genomes of Komagataeibacter and Acetobacter species. The analysis revealed for the first time a second acetan-like polysaccharide genetic cluster, that is widespread in both genera. All species of the Komagataeibacter possess at least one acetan genetic cluster, while it is present in only one third of the Acetobacter species surveyed.

• Language: English
• Keywords: extracellular polysaccharide, acetan, acetan genetic cluster, acetan synthesis, acetan viscoelasticity, applications of acetan, Komagataeibacter, Acetobacter, acetan-like polysaccharide, acetan-like polysaccharide genetic cluster, acetan structure
• Work type: Article
• Typology: 1.02 - Review Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 16 str.
• Numbering: Vol. 13, iss. 5, art. 815
• PID: 20.500.12556/RUL-135212
• UDC: 577.1
• ISSN on article: 2073-4360
• DOI: 10.3390/polym13050815
• COBISS.SI-ID: 54160899
• Publication date in RUL: 01.03.2022

Record is a part of a journal

• Title: Polymers
• Shortened title: Polymers
• Publisher: MDPI
• ISSN: 2073-4360
• COBISS.SI-ID: 517951257

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 07.03.2021