Navigation Links
Researchers from the UGR use a bacterium to obtain biopreservatives from food

The research group "Estudio de sustancias antagonistas producidas por microorganismos" (Antagonistic substances produced by microorganisms), part of the Microbiology Department of the University of Granada (Universidad de Granada [http://www.ugr.es]), has succeeded in isolating enterocin AS-48, which could have a medium-term use as food biopreservative. This represents a significant advance, given that biopreservation is an innovative method in food-preservation systems based on the use of microorganisms or their metabolic products to inhibit or destroy undesirable microorganisms.

Marina Sánchez Hidalgo, member of the research group and author of the doctoral thesis entitled 'Caracterización de variantes de la enterocina AS-48 obtenidas mediante mutagénesis dirigida' (Characterization of enterocin AS-48 variants via site-directed mutagenesis), explains that AS-48 is a bacteriocin (protein substance with antimicrobial activity) produced by Enterococcus faecalis S-48. "The bacteriocin is characterized by its circular structure —that is, because of the joining of its ends?contrary to most of proteins, which have a beginning and an end." AS-48 is very stable with respect to pH and temperature and has a broad action spectrum against numerous bacteria, including pathogenic bacteria transmitted by food, "which makes it a suitable molecule to use as a biopreservative."

The research carried out at the UGR will complete the information concerning the way that bacteriocins act on bacterial membranes and will also help in designing antimicrobial molecules with new characteristics. "Our work," states Marina Sánchez, "has determined which AS-48 amino acids are essential for membranestability and biological activity, and it has also helped us understand how this molecule permeabilizes bacterial membranes."

Competition for nutrients

Over the course of evolution, microorganisms have developed several strat
'"/>

Source:Universidad de Granada


Page: 1 2

Related biology news :

1. Researchers discover way to make cells in the eye sensitive to light
2. Researchers find how protein allows insects to detect and respond to pheromones
3. Researchers Uncover Key Step In Manufacture of Memory Protein
4. Researchers reveal the infectious impact of salmon farms on wild salmon
5. Researchers identify target for cancer drugs
6. Researchers discover molecule that causes secondary stroke
7. Researchers find missing genes of ancient organism
8. Researchers trace evolution to relatively simple genetic changes
9. Researchers add new tool to tumor-treatment arsenal
10. UF Researchers Map Bacterial Proteins That Cause Tooth Loss
11. VCU Researchers Identify Networks Of Genes Responding To Alcohol In The Brain
Post Your Comments:
(Date:7/28/2014)... of Medicine have pinpointed a mechanism in part of the ... blood, linking it to both type 1 and type 2 ... of Proceedings of the National Academies of Sciences . ... located in a part of the hypothalamus known as the ... that control glucose levels in the blood," said lead author ...
(Date:7/28/2014)... the top 10 U.S. cities that have seen an ... as frequent road closures, overwhelmed storm drains and compromised ... NOAA technical report. , This nuisance flooding, caused by ... coasts, between 300 and 925 percent since the 1960s. ... Frequency Changes around the United States, also finds Annapolis ...
(Date:7/28/2014)... has identified areas of the Earth that are high ... , Europe is particularly vulnerable, as it has the ... cent, of any continent in ,refugia, areas of ... conditions remain relatively constant during times of great environmental ... mostly in Scandinavia and Scotland. , The biggest ...
Breaking Biology News(10 mins):Glucose 'control switch' in the brain key to both types of diabetes 2NOAA: 'Nuisance flooding' an increasing problem as coastal sea levels rise 2NOAA: 'Nuisance flooding' an increasing problem as coastal sea levels rise 3Study finds Europe's habitat and wildlife is vulnerable to climate change 2
... TORONTO, ON A team of University of Toronto chemists ... quantum biology, observing quantum mechanics at work in photosynthesis in ... speculation that nature may be using quantum mechanical practices," says ... published this week in Nature . "Our latest ...
... that glaciers in the Himalayan mountains are thinning is ... examine and quantify the causes. Lawrence Berkeley National Laboratory ... of the most commonly blamed culpritgreenhouse gases, such as ... be causing the melting. Menon and her collaborators found ...
... For Immediate Release A team of scientists at ... on novel binding sites for an enzyme used by the ... discovery lays the foundation for the development of a new ... strains of the disease, and slow the evolution of drug ...
Cached Biology News:Scientists find quantum mechanics at work in photosynthesis 2Black carbon a significant factor in melting of Himalayan glaciers 2Black carbon a significant factor in melting of Himalayan glaciers 3Scripps Research scientists find two compounds that lay the foundation for a new class of AIDS drug 2Scripps Research scientists find two compounds that lay the foundation for a new class of AIDS drug 3Scripps Research scientists find two compounds that lay the foundation for a new class of AIDS drug 4Scripps Research scientists find two compounds that lay the foundation for a new class of AIDS drug 5
(Date:7/29/2014)... Tenn. (PRWEB) July 29, 2014 ... in biomass feedstock supply innovation and supply chain ... proprietary feedstock management systems, Energy Grange™ and Supply ... of R&D and in-the-field testing aimed at consolidating ... offering benefits to landowners, farmers and feedstock end ...
(Date:7/29/2014)... 29, 2014 Quorum Review IRB, ... been awarded accreditation by the International Association ... Lean Six Sigma Deployment Program. The citation recognizes ... performance. , Quorum’s Lean Six Sigma program was ... Program designation. The designation is a public statement ...
(Date:7/29/2014)... 29, 2014 The first product launch ... generation approach to robotics. What sets Droidles completely apart ... technology that allows them to communicate, share code with ... the internet. , “The invention is the system,” said ... Droidles a life of their own, both physically and ...
(Date:7/29/2014)... Jason Wendel – recipient of a Regional Top Doctor Award ... Plastic Surgeon Specialists for Nashville, TN – has released a ... a Hydration Booster, Retexturing Night Crème, and Anti-aging C Complex, ... more radiant appearance while protecting them from the sun’s harmful ... at Dr. J. J. Wendel Plastic Surgery, we have developed ...
Breaking Biology Technology:Genera Energy Introduces Proprietary Feedstock Management Systems 2Genera Energy Introduces Proprietary Feedstock Management Systems 3Genera Energy Introduces Proprietary Feedstock Management Systems 4Quorum Review IRB Accredited by IASSC for Lean Six Sigma Deployment Program 2Quorum Review IRB Accredited by IASSC for Lean Six Sigma Deployment Program 3Droidles, the Social Network of Robots and Open Source Platform for the Internet of Things, Launches for Crowd Funding on IndieGoGo.com 2Dr. J. J. Wendel Launches New Line of Skin Care Products 2
... only Web-based solution for managing compliance and regulated content throughout ... , SAN DIEGO, June 22 Drug ... Virtify, Inc. , the market leader in enterprise ... upcoming release of its Virtx integrated software suite, an end-to-end, ...
... alternative to Singulair and Zicam - The ALCAT Test , ... FDA knocked the wind out of asthmatics by requesting the ... drug, to upgrade their warning against psychotic side effects. Further ... also last week announced warnings that the drug may cause ...
... , , SINGAPORE, June 22 Globally, the largest ... achieve a reduction in CO2 emissions by 8.0 percent between 2008 ... 5.75 percent bio-fuels of all transportation fuel by December 2010 and ... market, it is witnessing rapid growth in terms of both new ...
Cached Biology Technology:Virtify, Inc. Delivers Industry's First Enterprise Content Compliance Software Suite for Life Sciences Companies 2Virtify, Inc. Delivers Industry's First Enterprise Content Compliance Software Suite for Life Sciences Companies 3Virtify, Inc. Delivers Industry's First Enterprise Content Compliance Software Suite for Life Sciences Companies 4Virtify, Inc. Delivers Industry's First Enterprise Content Compliance Software Suite for Life Sciences Companies 5Knocking the Wind Out of Asthmatics: Help from Hippocrates 2Government Mandates Create Guaranteed Market for Bio-Fuel, Says Frost & Sullivan 2Government Mandates Create Guaranteed Market for Bio-Fuel, Says Frost & Sullivan 3Government Mandates Create Guaranteed Market for Bio-Fuel, Says Frost & Sullivan 4
Sheep polyclonal to Streptomycin ( Abpromise for all tested applications). Antigen: Chemical / Small Molecule: Streptomycin conjugated to BSA....
Rabbit polyclonal to MAL ( Abpromise for all tested applications). entrezGeneID: 4118 SwissProtID: P21145...
Glutamate Receptor 5/1a...
Mouse monoclonal [3G8] to MDMA ( Abpromise for all tested applications)....
Biology Products: