Modulation of aroma compounds in yeast and lactic acid bacterium co‐fermented pork hydrolysates by thermal treatment and addition of aroma precursors (cysteine and xylose)

2022 ◽  
Author(s):  
Xinzhi Li ◽  
Shao‐Quan Liu
Keyword(s):  
Lactic Acid ◽  
Thermal Treatment ◽  
Lactic Acid Bacterium ◽  
Aroma Compounds ◽  
Aroma Precursors

scholarly journals Structural and Functional Conversion of Molecular Chaperone ClpB from the Gram-Positive Halophilic Lactic Acid Bacterium Tetragenococcus halophilus Mediated by ATP and Stress

2006 ◽  
Vol 188 (23) ◽  
pp. 8070-8078 ◽  
Author(s):  
Shinya Sugimoto ◽  
Hiroyuki Yoshida ◽  
Yoshimitsu Mizunoe ◽  
Keigo Tsuruno ◽  
Jiro Nakayama ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacterium ◽  
Molecular Chaperone ◽  
Thermal Inactivation ◽  
Gel Filtration ◽  
Ring Structure ◽  
Stress Conditions ◽  
Gel Filtration Chromatography ◽  
Gram Positive ◽  
Tetragenococcus Halophilus

ABSTRACT In this study, we report the purification, initial structural characterization, and functional analysis of the molecular chaperone ClpB from the gram-positive, halophilic lactic acid bacterium Tetragenococcus halophilus. A recombinant T. halophilus ClpB (ClpB Tha ) was overexpressed in Escherichia coli and purified by affinity chromatography, hydroxyapatite chromatography, and gel filtration chromatography. As demonstrated by gel filtration chromatography, chemical cross-linking with glutaraldehyde, and electron microscopy, ClpB Tha forms a homohexameric single-ring structure in the presence of ATP under nonstress conditions. However, under stress conditions, such as high-temperature (>45°C) and high-salt concentrations (>1 M KCl), it dissociated into dimers and monomers, regardless of the presence of ATP. The hexameric ClpB Tha reactivated heat-aggregated proteins dependent upon the DnaK system from T. halophilus (KJE Tha ) and ATP. Interestingly, the mixture of dimer and monomer ClpB Tha , which was formed under stress conditions, protected substrate proteins from thermal inactivation and aggregation in a manner similar to those of general molecular chaperones. From these results, we hypothesize that ClpB Tha forms dimers and monomers to function as a holding chaperone under stress conditions, whereas it forms a hexamer ring to function as a disaggregating chaperone in cooperation with KJE Tha and ATP under poststress conditions.

High efficacy bioconversion of starch to lactic acid using an amylolytic lactic acid bacterium isolated from Thai indigenous fermented rice noodles

2014 ◽  
Vol 23 (5) ◽  
pp. 1541-1550 ◽  
Author(s):  
Apinun Kanpiengjai ◽  
Wannisa Rieantrakoonchai ◽  
Ronachai Pratanaphon ◽  
Wasu Pathom-aree ◽  
Saisamorn Lumyong ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacterium ◽  
High Efficacy

Impact of thermal treatment and fermentation by lactic acid bacteria on sorghum metabolite changes, their antioxidant and antidiabetic activities

2021 ◽  
pp. 101502
Author(s):  
Fred Kwame Ofosu ◽  
Fazle Elahi ◽  
Eric Banan-Mwine Daliri ◽  
Sang-Ik Han ◽  
Deog-Hwan Oh
Keyword(s):  
Lactic Acid ◽  
Thermal Treatment ◽  
Lactic Acid Bacteria

scholarly journals Draft Genome Sequence of Enterococcus faecalis DD14, a Bacteriocinogenic Lactic Acid Bacterium with Anti-Clostridium Activity

2017 ◽  
Vol 5 (30) ◽  
Author(s):  
Yanath Belguesmia ◽  
Valérie Leclère ◽  
Matthieu Duban ◽  
Eric Auclair ◽  
Djamel Drider
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacterium ◽  
Enterococcus Faecalis ◽  
Genome Sequence ◽  
Draft Genome ◽  
Draft Genome Sequence ◽  
Coding Sequences ◽  
Content Type ◽  
Gram Positive Bacteria ◽  
Healthy Newborn

ABSTRACT We report the draft genome sequence of Enterococcus faecalis DD14, a strain isolated from meconium of a healthy newborn at Roubaix Hospital (France). The strain displayed antagonism against a set of Gram-positive bacteria through concomitant production of lactic acid and bacteriocin. The genome has a size of 2,893,365 bp and a 37.3% G+C ratio and is predicted to contain at least 2,755 coding sequences and 62 RNAs.

Production and purification of a novel exopolysaccharide from lactic acid bacterium Streptococcus phocae PI80 and its functional characteristics activity in vitro

2011 ◽  
Vol 102 (7) ◽  
pp. 4827-4833 ◽  
Author(s):  
Paulraj Kanmani ◽  
R. Satish kumar ◽  
N. Yuvaraj ◽  
K.A. Paari ◽  
V. Pattukumar ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacterium ◽  
Functional Characteristics

scholarly journals Characterization of γ-Aminobutyric acid(GABA) produced by a lactic acid bacterium from button mushroom bed

2013 ◽  
Vol 11 (4) ◽  
pp. 181-186 ◽  
Author(s):  
Yun-Seok Lee ◽  
Tae-Young Song ◽  
Won-Sik Kong ◽  
Min-Ho Yoon
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacterium ◽  
Aminobutyric Acid ◽  
Button Mushroom

scholarly journals Analysis of Transcriptomic Response to SO 2 by Oenococcus oeni Growing in Continuous Culture

2021 ◽  
Author(s):  
Cristobal A. Onetto ◽  
Peter J. Costello ◽  
Radka Kolouchova ◽  
Charlotte Jordans ◽  
Jane McCarthy ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacterium ◽  
High Sensitivity ◽  
Malolactic Fermentation ◽  
Oenococcus Oeni ◽  
Low Ph ◽  
Transcriptomic Response ◽  
Content Type ◽  
Bacterium Species ◽  
High Ethanol

Malolactic fermentation is an indispensable step in the elaboration of most wines and is generally performed by Oenococcus oeni , a Gram-positive heterofermentative lactic acid bacterium species. While O. oeni is tolerant to many of the wine stresses, including low pH and high ethanol concentrations, it has high sensitivity to SO 2 , an antiseptic and antioxidant compound regularly used in winemaking.

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