A new strain belonging to the genus Kocuria, designed PT10, was isolated from irradiated roots of the xerophyte Panicum turgidum. Isolate PT10 is a Gram-positive, coccoid, aerobic and ionizing-radiation (IR)-resistant actinobacterium. PT10 has shown an ability to survive under extreme conditions, such as gamma irradiation, desiccation and high concentration of hydrogen peroxide. Phenotypic, chemotaxonomic and comparative genome analyses support the assignment of strain PT10 (LMG 31102 = DSM 108617) as Kocuria rhizophila. The complete genome sequence of PT10 consists of one chromosome (2,656,287 bps), with a 70.7% G + C content and comprises 2481 protein-coding sequences. A total of 1487 proteins were identified by LC-MS/MS profiling. In silico analyses revealed that the proteome of the oxidation-tolerant PT10 possesses several features explaining its IR-resistant phenotype and many adaptive pathways implicated in response to environmental pressures — desiccation, cold, reactive oxygen species and other stressors.

从旱生植物Panicum turgidum的辐照根中分离出属于Kocuria属的新菌株，设计为 PT10 。Isolate PT10 是一种革兰氏阳性、球状、需氧和电离辐射 (IR) 抗性放线菌。PT10 已显示出在极端条件下生存的能力，例如伽马辐照、干燥和高浓度过氧化氢。表型、化学分类学和比较基因组分析支持将菌株 PT10 (LMG 31102 = DSM 108617) 指定为Kocuria rhizophila。PT10的完整基因组序列由1条染色体（2,656,287 bps）组成，G+C含量为70.7%，包含2481个蛋白质编码序列。通过 LC-MS/MS 分析共鉴定了 1487 种蛋白质。计算机 分析表明，耐氧化 PT10 的蛋白质组具有几个特征，可以解释其抗 IR 表型和许多与环境压力反应有关的适应性途径——干燥、寒冷、活性氧和其他压力源。