刘可可聂珍媛徐爱玲夏金兰.Acidiphilium cryptum DX1-1 CO2 固定相关基因的克隆及在不同营养
方式下的差异表达研究[J].,2011,11(18):3408-3412 |
Acidiphilium cryptum DX1-1 CO2 固定相关基因的克隆及在不同营养
方式下的差异表达研究 |
Cloning and Differential Expression ofAcidiphilium Cryptum DX1-1 CO2Fixed -Related Gene |
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DOI: |
中文关键词: 隐藏性嗜酸菌 CO2 固定基因 RT-qPCR 克隆 |
英文关键词: Acidiphilium Fixation of CO2 RT-qPCR Clone |
基金项目:国家重点基础研究发展计划(973)项目(2004CB619201),国家创新研究群体自然科学基金资助项目(50321402) |
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中文摘要: |
目的:研究Acidiphilium cryptum DX1-1 CO2 固定相关基因的克隆及在不同营养方式下的差异表达。方法:以Acidiphilium
cryptum DX1-1 (CCTCC M 208056) 的DNA 为模板, 基于A. cryptum JF-5 同源功能基因序列(JGI, http://genome.ornl.
gov/cgi-bin/JGI_microbial /kegg_categories.cgi)设计引物,对菌株DX1-1 中的CO2 固定相关基因Acry_0824,Acry_082,Acry_1067,
Acry_1272, Acry_0022 和Acry_0827 进行了克隆和序列比对分析;并对它们在不同营养条件下的基因差异表达进行了分析。结
果:从菌株DX1-1 成功克隆了所选择的CO2 固定相关基因,其序列与菌株JF 的同源功能基因序列一致性分别达到了99.8%,
99.6%,99.6%,99.5%,99.3%和99.8%;Acry_0824 ,Acry_1272 和Acry_0827 三个基因在各种混合养条件下表达均上调,说明它们
在DX1-1 CO2 固定中起较关键的作用。在加入0.1%的葡萄糖混合养条件下,DX1-1 细胞明显利用空气中的CO2 来生长和累积
PHB。结论:限制性葡萄糖可以促进细胞自养生长和累积PHB。 |
英文摘要: |
Objective: To investigate the energy substrates impact on the expression of genes related with CO2 fixed in
Acidiphilium cryptum DX1-1. Methods: DNA ofAcidiphilium DX1-1 (CCTCC M 208056) was used as template. The annotation of A.
cryptum DX1-1 genes and their putative cellular functions were from Comprehensive Microbial Resource (CMR) of A. cryptum JF-5
(JGI, http://genome.ornl.gov/cgi-bin/JGI_microbial /kegg_categories.cgi). Results: The genes related with CO2 fixed -Acry_0824,
Acry_082,Acry_1067,Acry_1272, Acry_0022 and Acry_0827 were cloned successfully. The RT-qPCR result shows that in mixotrophy
with addition of limited 0.1% glucose, the expression of Arcy_0824, Arcy_1272, Arcy_0827, were significantly upregulated in the
mixotrophy comparing to that in heterotrophy and autotrophy. Conclusion: PHB metabolism of DX1-1 is more activated in mixtrophy
and utilizing CO2 to accumulate PHB. |
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