PDF(Pubmed)
Abstract：
We investigated variations in cell growth and ATP Sulfurylase (ATPS) activity when two cyanobacterial strains-Synechocystis sp. PCC6803 and Synechococcus sp. WH7803-were grown in conventional media, and media with low ammonium, low sulfate and a high CO2/low O2 atmosphere. In both organisms, a transition and adaptation to the reconstructed environmental media resulted in a decrease in ATPS activity. This variation appears to be decoupled from growth rate, suggesting the enzyme is not rate-limiting in S assimilation and raising questions about the role of ATPS redox regulation in cell physiology and throughout Earth history.
摘要：
我们研究了两种蓝细菌菌株Synechocystissp。时细胞生长和ATP硫化酶（ATPS）活性的变化。PCC6803和Synechococcussp。WH7803-在常规培养基中生长，和低铵的介质，低硫酸盐和高CO2/低O2气氛。在这两种生物中，对重建环境介质的过渡和适应导致ATPS活性下降。这种变化似乎与增长率脱钩，表明该酶在S同化中不是限速的，并引发了有关ATPS氧化还原调节在细胞生理学和整个地球历史中的作用的疑问。
