RESUMEN
Lactobacillus sakei is a psychotrophic lactic acid bacterium found naturally on fresh meat and fish. This microorganism is widely used in the manufacture of fermented meats and has biotechnological potential in biopreservation and food safety. We have explored the 1,884,661-base-pair (bp) circular chromosome of strain 23K encoding 1,883 predicted genes. Genome sequencing revealed a specialized metabolic repertoire, including purine nucleoside scavenging that may contribute to an ability to successfully compete on raw meat products. Many genes appear responsible for robustness during the rigors of food processing--particularly resilience against changing redox and oxygen levels. Genes potentially responsible for biofilm formation and cellular aggregation that may assist the organism to colonize meat surfaces were also identified. This genome project is an initial step for investigating new biotechnological approaches to meat and fish processing and for exploring fundamental aspects of bacterial adaptation to these specific environments.
Asunto(s)
Proteínas Bacterianas/metabolismo , Genoma Bacteriano/genética , Ácido Láctico/biosíntesis , Lactobacillus/genética , Lactobacillus/metabolismo , Carne/microbiología , Transducción de Señal/fisiología , Animales , Proteínas Bacterianas/genética , Secuencia de Bases , Mapeo Cromosómico , Microbiología de Alimentos , Perfilación de la Expresión Génica/métodos , Regulación de la Expresión Génica/fisiología , Datos de Secuencia MolecularRESUMEN
Lactobacillus sakei is one of the most important bacterial species involved in meat preservation and meat fermentation. In the last fifteen years, numerous studies have focused on this species due to its important role in food microbiology. The present paper reviews current knowledge of this emerging species in the fields of taxonomy, phylogeny and physiology, and metabolism. Recent developments in genetic tools and molecular genetics will also be emphasized to evaluate future prospects.