Exemplar Abstract for Oenococcus oeni (Garvie 1967) Dicks et al. 1995.

2003 ◽  
Author(s):  
Charles Thomas Parker ◽  
Dorothea Taylor ◽  
George M Garrity
Keyword(s):  
Oenococcus Oeni

Exemplar Abstract for Oenococcus oeni (Garvie 1967) Dicks et al. 1995.

2003 ◽  
Author(s):  
Charles Thomas Parker ◽  
Dorothea Taylor ◽  
George M Garrity
Keyword(s):  
Oenococcus Oeni

scholarly journals Use of Yeast Mannoproteins by Oenococcus oeni during Malolactic Fermentation under Different Oenological Conditions

Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1540
Author(s):  
Aitor Balmaseda ◽  
Laura Aniballi ◽  
Nicolas Rozès ◽  
Albert Bordons ◽  
Cristina Reguant
Keyword(s):  
Energy Source ◽  
Nutrient Medium ◽  
Alcoholic Fermentation ◽  
Hydrolytic Activity ◽  
Malolactic Fermentation ◽  
Oenococcus Oeni ◽  
Consumption Patterns ◽  
Inhibitor Compounds

Oenococcus oeni is the main agent of malolactic fermentation in wine. This fermentation takes place after alcoholic fermentation, in a low nutrient medium where ethanol and other inhibitor compounds are present. In addition, some yeast-derived compounds such as mannoproteins can be stimulatory for O. oeni. The mannoprotein concentration in wine depends on the fermenting yeasts, and non-Saccharomyces in particular can increase it. As a result of the hydrolytic activity of O. oeni, these macromolecules can be degraded, and the released mannose can be taken up and used as an energy source by the bacterium. Here we look at mannoprotein consumption and the expression of four O. oeni genes related to mannose uptake (manA, manB, ptsI, and ptsH) in a wine-like medium supplemented with mannoproteins and in natural wines fermented with different yeasts. We observe a general gene upregulation in response to wine-like conditions and different consumption patterns in the studied media. O. oeni was able to consume mannoproteins in all the wines. This consumption was notably higher in natural wines, especially in T. delbrueckii and S. cerevisiae 3D wines, which presented the highest mannoprotein levels. Regardless of the general upregulation, it seems that mannoprotein degradation is more closely related to the fermenting medium.

scholarly journals Effect of Adaptation to Ethanol on Cytoplasmic and Membrane Protein Profiles of Oenococcus oeni

2004 ◽  
Vol 70 (5) ◽  
pp. 2748-2755 ◽  
Author(s):  
M. Graça Silveira ◽  
Maja Baumgärtner ◽  
Frank M. Rombouts ◽  
Tjakko Abee
Keyword(s):  
Membrane Protein ◽  
Redox Balance ◽  
Oenococcus Oeni ◽  
Starter Cultures ◽  
Phosphotransferase System ◽  
Protein Patterns ◽  
Protein Levels ◽  
Proteomic Approach ◽  
Associated Proteins ◽  
Adaptation Response

ABSTRACT The practical application of commercial malolactic starter cultures of Oenococcus oeni surviving direct inoculation in wine requires insight into mechanisms of ethanol toxicity and of acquired ethanol tolerance in this organism. Therefore, the site-specific location of proteins involved in ethanol adaptation, including cytoplasmic, membrane-associated, and integral membrane proteins, was investigated. Ethanol triggers alterations in protein patterns of O. oeni cells stressed with 12% ethanol for 1 h and those of cells grown in the presence of 8% ethanol. Levels of inosine-5′-monophosphate dehydrogenase and phosphogluconate dehydrogenase, which generate reduced nicotinamide nucleotides, were decreased during growth in the presence of ethanol, while glutathione reductase, which consumes NADPH, was induced, suggesting that maintenance of the redox balance plays an important role in ethanol adaptation. Phosphoenolpyruvate:mannose phosphotransferase system (PTS) components of mannose PTS, including the phosphocarrier protein HPr and EIIMan, were lacking in ethanol-adapted cells, providing strong evidence that mannose PTS is absent in ethanol-adapted cells, and this represents a metabolic advantage to O. oeni cells during malolactic fermentation. In cells grown in the presence of ethanol, a large increase in the number of membrane-associated proteins was observed. Interestingly, two of these proteins, dTDT-glucose-4,6-dehydratase and d-alanine:d-alanine ligase, are known to be involved in cell wall biosynthesis. Using a proteomic approach, we provide evidence for an active ethanol adaptation response of O. oeni at the cytoplasmic and membrane protein levels.

scholarly journals Three novel structural phenomena in the cellular ontogeny of Oenococcus oeni from northern China

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Yun Wang ◽  
Shuwen Liu ◽  
Jing Su ◽  
Yu Zhang ◽  
Jing Li ◽  
...  
Keyword(s):  
Northern China ◽  
Oenococcus Oeni

Intraspecific diversity of Oenococcus oeni strains determined by sequence analysis of target genes

2006 ◽  
Vol 73 (2) ◽  
pp. 394-403 ◽  
Author(s):  
Arnaud Delaherche ◽  
Elisabeth Bon ◽  
Aurelien Dupé ◽  
Megumi Lucas ◽  
Benoit Arveiler ◽  
...  
Keyword(s):  
Sequence Analysis ◽  
Target Genes ◽  
Oenococcus Oeni ◽  
Intraspecific Diversity
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