RT Journal Article SR Electronic(1) A1 Bassil, Naji M. A1 Lloyd, Jonathan R.YR 2019 T1 Anaerobacillus isosaccharinicus sp. nov., an alkaliphilic bacterium which degrades isosaccharinic acid JF International Journal of Systematic and Evolutionary Microbiology, VO 69 IS 12 SP 3666 OP 3671 DO https://doi.org/10.1099/ijsem.0.002721 PB Microbiology Society, SN 1466-5034, AB Strain NB2006T was isolated from an isosaccharinate-degrading, nitrate-reducing enrichment culture in minimal freshwater medium at pH 10. Analysis of the 16S rRNA gene sequence indicated that this strain was most closely related to species of the newly established genus Anaerobacillus . This was supported by phenotypic and metabolic characterisation that showed that NB2006T was rod-shaped, Gram-stain-positive, motile and formed endospores. It was an aerotolerant anaerobe and an obligate alkaliphile that grew at pH 8.5–11, could tolerate up to 6 % (w/v) NaCl, and grew at a temperature between 10 and 40 °C. In addition, it could utilise a number of organic substrates, and was able to reduce nitrate and arsenate. The predominant cellular fatty acids were C16 : 0, C16 : 1ω11c, anteiso-C15 : 0, iso-C15 : 0, C16 : 1ω7c/iso-C15 : 0 2-OH and C14 : 0. The cell wall peptidoglycan contained meso-diaminopimelic acid and the DNA G+C content was 37.7 mol%. In silico DNA–DNA hybridization with the four known species of the genus Anaerobacillus showed 21.8, 21.9, 22.4, and 21.5 % relatedness to Anaerobacillus arseniciselenatis DSM 15340T, Anaerobacilus alkalidiazotrophicus DSM 22531T, Anaerobacillus alkalilacustris DSM 18345T, and Anaerobacillus macyae DSM 16346T, respectively. NB2006T differed from strains of other species of the genus Anaerobacillus in its ability to metabolise isosaccharinate, an alkaline hydrolysis product of cellulose. On the basis of the consensus of phylogenetic and phenotypic analyses, this strain represents a novel species of the genus Anaerobacillus , for which the name Anaerobacillus isosaccharinicus sp. nov. is proposed. The type strain is NB2006T (=DSM 100644T=LMG 30032T)., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.002721