Regulation of nitrate assimilation in cyanobacteria
作者: Yoshitake OhashiWei ShiNobuyuki TakataniMakiko AichiShin-ichi MaedaSatoru WatanabeHirofumi YoshikawaTatsuo Omata
刊名: Journal of Experimental Botany, 2011, Vol.62 (4), pp.1411-1424
来源数据库: Oxford University Press
DOI: 10.1093/jxb/erq427
关键词: Cyanobacterianitrate assimilationnitrate transporter2-oxoglutaratePII
原始语种摘要: Nitrate assimilation by cyanobacteria is inhibited by the presence of ammonium in the growth medium. Both nitrate uptake and transcription of the nitrate assimilatory genes are regulated. The major intracellular signal for the regulation is, however, not ammonium or glutamine, but 2-oxoglutarate (2-OG), whose concentration changes according to the change in cellular C/N balance. When nitrogen is limiting growth, accumulation of 2-OG activates the transcription factor NtcA to induce transcription of the nitrate assimilation genes. Ammonium inhibits transcription by quickly depleting the 2-OG pool through its metabolism via the glutamine synthetase/glutamate synthase cycle. The PII protein inhibits the ABC-type nitrate transporter, and also nitrate reductase in some strains, by...
全文获取路径: Oxford U Press 
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影响因子:5.242 (2012)

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关键词翻译
关键词翻译
  • nitrate 硝酸盐
  • assimilation 岩浆的同化酌
  • cyanobacteria 蓝藻细菌
  • transcription 地名转写
  • protein 蛋白质
  • nitrogen 
  • balance 平衡
  • glutamine 谷氨酰胺
  • ammonium 
  • quickly 快速地