Microcella alkaliphila sp. nov., a novel member of the family Microbacteriaceae isolated from a non-saline alkaline groundwater, and emended description of the genus Microcella.
A high-G+C-content Gram-positive bacterium, designated as strain AC4r(T), was isolated from a highly alkaline, non-saline groundwater environment (pH 11.4). This organism formed small rod-shaped cells, was aerobic, heterotrophic, catalase-positive and oxidase-negative and had an optimum growth temperature of 35 degrees C and an optimum pH of 9.5. The strain possessed a B2beta-type cell-wall peptidoglycan, with d-Orn as the diagnostic diamino acid. The major respiratory quinones were unsaturated menaquinones with 13 and 14 isoprene units. The predominant fatty acids were anteiso-15 : 0, iso-16 : 0, iso-14 : 0 and iso-15 : 0. The G+C content of the DNA was 67.1 mol%. In a 16S rRNA gene sequence analysis, strain AC4r(T) showed the highest level of similarity (99.2 %) to the type strain of Microcella putealis; however, the DNA-DNA reassociation value between these two organisms was low (38.3 %). On the basis of phylogenetic analysis, the DNA-DNA reassociation value and distinct phenotypic characteristics, strain AC4r(T) represents a novel species within the genus Microcella, for which the name Microcella alkaliphila sp. nov. is proposed. The type strain is AC4r(T) (=LMG 22690(T)=CIP 108473(T)).
Tiago
Igor
I
Centro de Neurociências de Biologia Celular, Universidade de Coimbra, 3004-517 Coimbra, Portugal.|Departamento de Zoologia, Universidade de Coimbra, 3004-517 Coimbra, Portugal.
Morais
Paula V
PV
Instituto do Ambiente e Vida, Universidade de Coimbra, 3004-517 Coimbra, Portugal.|Departamento de Bioquímica, Universidade de Coimbra, 3004-517 Coimbra, Portugal.
da Costa
Milton S
MS
Departamento de Bioquímica, Universidade de Coimbra, 3004-517 Coimbra, Portugal.|Centro de Neurociências de Biologia Celular, Universidade de Coimbra, 3004-517 Coimbra, Portugal.
Veríssimo
António
A
Centro de Neurociências de Biologia Celular, Universidade de Coimbra, 3004-517 Coimbra, Portugal.|Departamento de Zoologia, Universidade de Coimbra, 3004-517 Coimbra, Portugal.
D000192:Actinomycetales / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D015373:Bacterial Typing Techniques; D001482:Base Composition; D004269:DNA, Bacterial / Q000032:analysis; D004275:DNA, Ribosomal / Q000032:analysis; D005618:Fresh Water / Q000382:microbiology*; D020459:Genes, rRNA; D006863:Hydrogen-Ion Concentration; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010641:Phenotype; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012965:Sodium Chloride; D013045:Species Specificity
D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D012965:Sodium Chloride