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The 5th International Conference on Acetic Acid Bacteria AAB2018 will cover all aspects of acetic acid bacteria, from their diversity and their role in nature, their genetics, cellular biology and metabolic functions, to applications in various sectors of industry. For this, the scientific program is structured into the following topical sessions:

Ecology and Biodiversity

Acetic acid bacteria occur in various diverse natural niches such as flowers, fruits, insect digestive tracts, as well as in man-shaped habitats such as vinegars or other fermented foods. This session deals with the role of acetic acid bacteria in microbial consortia and the impact of major factors determining the microbiota dynamics and composition, including cell-to cell contact or exopolysaccharide and biofilm formation. Key technologies applied in this research area involve cultivation techniques as well as bioinformatic analyses of (meta)omics data on DNA, RNA and protein level as well as FISH technologies.

Genetics and Molecular Biology

Modern genetic and high-throughput omics methods have become instrumental to gain a deeper understanding of the molecular biology and gene regulation in acetic acid bacteria.  In this session, their genomic biodiversity and plasticity is discussed with respect to pan- and core genomes, plasmidomes and mobile genetic elements including bacteriophages. Tools are presented to probe genetic amenability of these bacteria, to heterologously express new traits or probe gene expression under varying conditions by reporter systems. Technologies of relevance for the topics of this session include sequencing technologies and cloning strategies, promoter probe and reporter systems.

Physiology and Metabolism

The lifestyle of acetic acid bacteria in their natural habitats as well as in industrial production processes is supported by their unique metabolism (e. g. oxidative metabolism, incomplete glycolysis/TCA cycle, acid/sugar tolerance). This session is centered on acetic acid bacterial physiology and metabolism, including mechanisms of mutualistic interaction, competition and antagonistic activities. Methods used in this section include metabolomics (HPLC; IC; GC-MS, LC-MS etc.) as well as metabolic predictions from (meta)-transcriptomics or proteomics. Contributions are also welcome on the functionality of key metabolic enzymes and on strain engineering. 

Vinegars, Beverages & Food, other Applications of AAB

Various acetic acid bacteria are used in different fields of application, from traditional food fermentations to industrial production of food ingredients, or compounds of interest for the chemical, cosmetics or pharmaceutical industries. In this session, areas of biotechnological application and bioprocess engineering are discussed, including existing and future industrial processes, process design, sensory evaluation of food products or agricultural and medical applications. We expect contributions to the following (incomplete) list of subsections of this session.

  • Oxidative processes
  • Vinegars
  • Beverages and Foods
  • Cellulose and Polysaccharides
  • Symbionts, Biofertilizers and Probiotics
  • Biosensors

 

AAB2018 – Session Schedule

 

Tuesday, Sept. 4, 2018

16:00-18:00    Registration

18:00               Welcome Reception

 

Wednesday, Sept. 5, 2018

09:00-09:20    Welcome Address  (Conference chairs, Vice Dean of WZW))

Session 1 – Ecology & Biodiversity  (Chairs: Wolfgang Liebl, Luc De Vuyst)

09:20-09:55    Janja Trcek (Maribor, Slovenia)Genomic exploration of diversity and speciation of acetic acid bacteria

09:55-10:30    Hubert Antolak (Lodz, Poland) Asaia spp. - hopes and fears in human life and biotechnology

10:30-11:05    coffee/tea

11:05-11:25    Jonas de Roos (Brussels, Belgium) Temporal and spatial distribution of acetic acid bacteria during lambic beer fermentation and maturation

Session 2 – Genetics & Molecular Biology  (Chairs: Frank Jakob, Uwe Deppenmeier)

11:25-12:00    Dongping Sun (Nanjing, P.R. China)Reconstruction of a genome-scale metabolic network of Komagataeibacter nataicola RZS01 for cellulose production

12:00-12:35    Armin Ehrenreich (Freising, Germany)Molecular approaches for the characterization of membrane-bound dehydrogenases

12:35-14:00    lunch

14:00-14:35    Tino Polen (Jülich, Germany)Deeper insights in Gluconobacter oxydans strains by genome and transcriptome analysis for metabolic engineering

14:35-14:55    Paul Schweiger (La Crosse, WI, USA) Surface display and control of gene expression in acetic acid bacteria

14:55-15:15    Yuri Ishii (Sanda, Japan) pH responsive transcriptional regulator in Komagataeibacter europaeus

15:15-15:35    Rudy Pelicaen (Brussels, Belgium) Genome-scale metabolic modeling of Acetobacter pasteurianus 386B

15:35-15:55    Martin Bimmer (Freising, Germany) Genetic analysis of cellulose synthesis in acetic acid bacteria

16:00-18:00    Poster Session

18:00-20:00    Buffet Dinner /cont. Poster Session

 

 

Thursday, Sept. 6, 2018

Session 3 – Physiology & Metabolism  (Chairs: Janja Trcek, Michael Bott)

09:00-09:35    Daniele Daffonchio (KAUST, Saudi Arabia)Ecophysiology of acetic acid bacterial symbionts in insects

09:35-10:10    Fusheng Chen (Wuhan, P.R. China) Investigation of mechanisms conferring acid resistance to Acetobacter pasteurianus based on RNA-Seq technology at different acid concentration

10:10-10:45    Frank Jakob (Freising, Germany)Mechanistic and ecological insights into polysaccharide formation from sucrose by specialized acetic acid bacteria

10:45-11:30    coffee/tea

11:30-11:50    Kazunobu Matshushita (Yamaguchi, Japan) Natural mutation could alter the thermotolerance among closely related Acetobacter pasteurianus strains

11:50-12:10    Hengye Chen (Wuhan, China), François Barja (Geneva, Switzerland) Isolation and identification of an antimicrobial compound – phenyllactic acid in Shanxi aged vinegar (Chinese traditional cereal vinegar)

12:10-12:30    Minh Thuy Nguyen (Yamaguchi, Japan) Characterization of 5-keto-D-fructose reductase of Gluconobacter sp.

12:30-12:50    Toshiharu Yakushi (Yamaguchi, Japan) New substrates and products on the action of PQQ-dependent glycerol dehydrogenase of Gluconobacter sp.

13:00-22:00    Networking Excursion and Conference Dinner

 

Friday, Sept. 7, 2018

Session 4 – Biotechnological Exploitation  (Chairs: Isidoro Garcia, Rudi Vogel)

09:00-09:35    Luc de Vuyst (Brussels, Belgium)Functional role of acetic acid bacteria in non-vinegar food and beverage fermentation processes

09:35-10:10    Uwe Deppenmeier (Bonn, Germany)Modification and optimization of Gluconobacter strains for the production of prebiotics and low calorie sweeteners

10:10-10:30    Frank Emde (Rheinbach, Germany)Bioprocess engineering aspects of fermentations with acetic acid bacteria

10:30-11:10    coffee/tea

11:10-11:30    Maria Gullo (Reggio Emilia, Italy) Cellulose-producing acetic acid bacteria: the organism into the process

11:30-11:50    François Barja (Geneva, Switzerland) Bacterial cellulose/2D nanomaterials composite with 3D architecture

11:50-12:10    Christian Burger (Garching, Germany) Bioprocess development for biocatalytic oxidations with recombinant Gluconobacter oxydans

12:10-12:30    Xianlong Zhang (Tianjin, China) Revealing and envisaging the formation of sediments in traditional Chinese vinegar

12:30-12:50    Yoshinao Azuma (Kindai, Japan) An idea to sustain vinegar production under global warming

12:50-13:00    Closing Remarks, End of Conference