Strain HS-399 was isolated from a mangrove swamp in Biscayne Bay (Florida, USA) and selected for its capacity to accumulate lipids (84.0 ± 1.0% DW), particularly docosahexaenoic acid (DHA; 22:6 n-3) (28.3 ± 0.1% DW). Molecular phylogenetic analysis demonstrated that the new organism belonged to the genus Aurantiochytrium, and when the whole nuclear genome was blasted against the type species (and only described species), A. limacinum SR21, there was a 5.38% difference at the protein level. We described our new organism as Aurantiochytrium acetophilum sp. nov. (Thraustochytriaceae, Thraustochytriales) using light microscopy, electron microscopy, substrate assimilation, biochemical composition and nuclear genomic data. We found some characteristics of biotechnological relevance that were not previously described in this family. First, strain HS-399 of A. acetophilum was extremely tolerant to acetate toxicity, and it used this substrate as a sole carbon source. Second, we observed putative gametes that fused together to form a zygote. Zygote fate and the life stage with meiosis were not determined; however, we found several meiosis genes in the genome, further supporting the possibility of breeding for these industrially relevant organisms.

HS-399菌株是从比斯坎湾（美国佛罗里达州）的红树林沼泽中分离出来的，并因其积累脂质（84.0±1.0％DW），特别是二十二碳六烯酸（DHA; 22：6 n-3）（28.3± 0.1％DW）。分子系统发育分析表明，该新生物属于Aurantiochytrium属，当将整个核基因组针对特定物种（仅描述的物种）A。limacinum SR21进行blast攻击时，蛋白质水平相差5.38％。我们将我们的新生物描述为嗜酸金梭菌sp。十一月 （Thuraustochytriaceae，Thraustochytriales）使用光学显微镜，电子显微镜，底物吸收，生化组成和核基因组数据。我们发现了该家族以前没有描述过的一些生物技术相关特征。首先，嗜热芽孢杆菌的HS-399菌株极耐乙酸盐毒性，并将其作为唯一的碳源。其次，我们观察到推定的配子融合在一起形成合子。合子的命运和减数分裂的生命阶段尚未确定。然而，我们在基因组中发现了几个减数分裂基因，进一步支持了这些与工业相关的生物繁殖的可能性。