Manuel Zúñiga1, Ciara Luna Gómez-Escoín, Fernando González-Candelas. 1. Departamento de Biotecnología de Alimentos, Instituto de Agroquímica y Tecnología de Alimentos, Consejo Superior de Investigaciones Científicas, PO Box 73, 46100 Burjassot, Valencia, Spain. btcman@iata.csic.es
Abstract
BACKGROUND: Two component systems (TCS) are signal transduction pathways which typically consist of a sensor histidine kinase (HK) and a response regulator (RR). In this study, we have analyzed the evolution of TCS of the OmpR/IIIA family in Lactobacillaceae and Leuconostocaceae, two families belonging to the group of lactic acid bacteria (LAB). LAB colonize nutrient-rich environments such as foodstuffs, plant materials and the gastrointestinal tract of animals thus driving the study of this group of both basic and applied interest. RESULTS: The genomes of 19 strains belonging to 16 different species have been analyzed. The number of TCS encoded by the strains considered in this study varied between 4 in Lactobacillus helveticus and 17 in Lactobacillus casei. The OmpR/IIIA family was the most prevalent in Lactobacillaceae accounting for 71% of the TCS present in this group. The phylogenetic analysis shows that no new TCS of this family has recently evolved in these Lactobacillaceae by either lineage-specific gene expansion or domain shuffling. Furthermore, no clear evidence of non-orthologous replacements of either RR or HK partners has been obtained, thus indicating that coevolution of cognate RR and HKs has been prevalent in Lactobacillaceae. CONCLUSIONS: The results obtained suggest that vertical inheritance of TCS present in the last common ancestor and lineage-specific gene losses appear as the main evolutionary forces involved in their evolution in Lactobacillaceae, although some HGT events cannot be ruled out. This would agree with the genomic analyses of Lactobacillales which show that gene losses have been a major trend in the evolution of this group.
BACKGROUND: Two component systems (TCS) are signal transduction pathways which typically consist of a sensor histidine kinase (HK) and a response regulator (RR). In this study, we have analyzed the evolution of TCS of the OmpR/IIIA family in Lactobacillaceae and Leuconostocaceae, two families belonging to the group of lactic acid bacteria (LAB). LAB colonize nutrient-rich environments such as foodstuffs, plant materials and the gastrointestinal tract of animals thus driving the study of this group of both basic and applied interest. RESULTS: The genomes of 19 strains belonging to 16 different species have been analyzed. The number of TCS encoded by the strains considered in this study varied between 4 in Lactobacillus helveticus and 17 in Lactobacillus casei. The OmpR/IIIA family was the most prevalent in Lactobacillaceae accounting for 71% of the TCS present in this group. The phylogenetic analysis shows that no new TCS of this family has recently evolved in these Lactobacillaceae by either lineage-specific gene expansion or domain shuffling. Furthermore, no clear evidence of non-orthologous replacements of either RR or HK partners has been obtained, thus indicating that coevolution of cognate RR and HKs has been prevalent in Lactobacillaceae. CONCLUSIONS: The results obtained suggest that vertical inheritance of TCS present in the last common ancestor and lineage-specific gene losses appear as the main evolutionary forces involved in their evolution in Lactobacillaceae, although some HGT events cannot be ruled out. This would agree with the genomic analyses of Lactobacillales which show that gene losses have been a major trend in the evolution of this group.
Authors: Toshio Fujii; Colin Ingham; Jiro Nakayama; Marke Beerthuyzen; Ryoko Kunuki; Douwe Molenaar; Mark Sturme; Elaine Vaughan; Michiel Kleerebezem; Willem de Vos Journal: J Bacteriol Date: 2008-09-19 Impact factor: 3.490
Authors: R David Pridmore; Bernard Berger; Frank Desiere; David Vilanova; Caroline Barretto; Anne-Cecile Pittet; Marie-Camille Zwahlen; Martine Rouvet; Eric Altermann; Rodolphe Barrangou; Beat Mollet; Annick Mercenier; Todd Klaenhammer; Fabrizio Arigoni; Mark A Schell Journal: Proc Natl Acad Sci U S A Date: 2004-02-24 Impact factor: 11.205
Authors: Konstantinos Papadimitriou; Ángel Alegría; Peter A Bron; Maria de Angelis; Marco Gobbetti; Michiel Kleerebezem; José A Lemos; Daniel M Linares; Paul Ross; Catherine Stanton; Francesca Turroni; Douwe van Sinderen; Pekka Varmanen; Marco Ventura; Manuel Zúñiga; Effie Tsakalidou; Jan Kok Journal: Microbiol Mol Biol Rev Date: 2016-07-27 Impact factor: 11.056