Oenococcus 

What you should know:

Oenococcus is a Gram-positive coccus that converts malic acid to lactic acid in fermentation. Malic acid contributes to a harsher taste in wine, and this malolactic fermentation softens the flavor of wine. Oenococcus is also very acid and alcohol-tolerant, surviving in the fermented brew longer than many other microbes.

Links

• http://www.lbl.gov/Science-Articles/Archive/JGI-wine-making-genome.html
• http://genome.jgi-psf.org/draft_microbes/oenoe/oenoe.home.html