Lv Jie, Li Ning, Niu Deng-Ke
MOE Key Laboratory for Biodiversity Science and Ecological Engineering, College of Life Sciences, Beijing Normal University, Xinjiekouwai street 19, Beijing 100875, China.
Biochem Biophys Res Commun. 2008 Oct 17;375(2):241-6. doi: 10.1016/j.bbrc.2008.08.011. Epub 2008 Aug 14.
The cyanobacteria Prochlorococcus is a cyanbacterial genus, with some strains adapted to sea surface environments, which are poor in nutrients and have high-light intensity, and some strains adapted to deep sea conditions, which have relatively higher concentrations of nitrogen and phosphorus and lower light intensity. Here, we report pairwise comparisons between strains isolated from different depths of the same sea, which reveal a close association between atomic composition of the proteome and the availability nitrogen and phosphorus in the environment. The atomic composition of proteomes differs significantly among Prochlorococcus strains with different supplies of nitrogen in vivo; these different supplies result from different capacities for nitrogen assimilation. We repeated our whole-proteome analysis with the core proteomes of Prochlorococcus and obtained similar results. Our findings indicate that the elemental composition of proteomes is shaped by the availability of resources in the environment.
蓝细菌原绿球藻是一种蓝细菌属，一些菌株适应营养匮乏且光照强度高的海面环境，而一些菌株适应氮磷浓度相对较高且光照强度较低的深海环境。在此，我们报告了从同一海域不同深度分离出的菌株之间的成对比较，这些比较揭示了蛋白质组的原子组成与环境中氮和磷的可利用性之间的密切关联。在体内氮供应不同的原绿球藻菌株中，蛋白质组的原子组成存在显著差异；这些不同的供应源于不同的氮同化能力。我们用原绿球藻的核心蛋白质组重复了全蛋白质组分析，得到了类似的结果。我们的研究结果表明，蛋白质组的元素组成受环境中资源可利用性的影响。
