title: Bacillus coahuilensis sp. nov., a moderately halophilic species from a desiccation lagoon in the Cuatro Ciénegas Valley in Coahuila, Mexico.
abstract: A moderately halophilic, Gram-positive and rod-shaped bacterium, strain m4-4T, was isolated from a Chihuahuan desert lagoon in Cuatro Ciénegas, Coahuila, Mexico. Strain m4-4T was found to grow optimally at 30-37 degrees C, pH 7.0-8.0 and 5 % NaCl and to tolerate from 0.5 % to 10 % NaCl. It was shown to be aerobic. The genomic DNA G+C content was about 37 mol%. Strain m4-4T exhibited minimal or no growth on most sugars tested. Its major cellular fatty acids were C14 : 0, C16 : 0 and C18 : 1. Based on phylogenetic analysis of 16S rRNA and recA gene sequences, we observed that the closest relatives of the isolate are moderately halophilic Bacillus species, with 16S rRNA gene sequence similarity ranging from 96.6 to 97.4 % (Bacillus marisflavi, Bacillus aquimaris and Bacillus vietnamensis). Additionally, using genomic data it was determined that the type strain contains a total of nine rRNA operons with three slightly different sequences. On the basis of phenotypic and molecular properties, strain m4-4T represents a novel species within the genus Bacillus, for which the name Bacillus coahuilensis sp. nov. is proposed, with the type strain m4-4T (=NRRL B-41737T =CECT 7197T).
authors.affiliation: Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Apartado Postal 70-275, México DF 04510, Mexico.
authors.forename: René
authors.initials: R
authors.lastname: Cerritos
authors.forename: Pablo
authors.initials: P
authors.lastname: Vinuesa
authors.forename: Luis E
authors.initials: LE
authors.lastname: Eguiarte
authors.forename: Luis
authors.initials: L
authors.lastname: Herrera-Estrella
authors.forename: Luis D
authors.initials: LD
authors.lastname: Alcaraz-Peraza
authors.forename: Jackeline L
authors.initials: JL
authors.lastname: Arvizu-Gómez
authors.forename: Gabriela
authors.initials: G
authors.lastname: Olmedo
authors.forename: Enrique
authors.initials: E
authors.lastname: Ramirez
authors.forename: Janet L
authors.initials: JL
authors.lastname: Siefert
authors.forename: Valeria
authors.initials: V
authors.lastname: Souza
mesh_terms: D001407:Bacillus / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism; D001482:Base Composition; D001483:Base Sequence; D050260:Carbohydrate Metabolism; D017931:DNA Primers / Q000235:genetics; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D005798:Genes, Bacterial; D008800:Mexico; D008969:Molecular Sequence Data; D010802:Phylogeny; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D011938:Rec A Recombinases / Q000235:genetics; D054712:Salinity; D013045:Species Specificity; D014871:Water Microbiology
chemical_list: D017931:DNA Primers; D004269:DNA, Bacterial; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D011938:Rec A Recombinases