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Bradyrhizobium japonicum : ウィキペディア英語版 | Bradyrhizobium japonicum
''Bradyrhizobium japonicum'' is a species of legume-root nodulating, microsymbiotic nitrogen-fixing bacterium species. ''B. japonicum'' is identified as a DNA homology group (group II). ''B. japonicum'' is able to degrade catechin with formation of phloroglucinol carboxylic acid, further decarboxylated to phloroglucinol, which is dehydroxylated to resorcinol and hydroxyquinol. ''B. japonicum'' possess the nosRZDFYLX gene, which aides in denitrification and has two catalytic subunits - Cu-a and Cu-z (with several histidine residues). It manages an expression cascade that can sense oxygen gradients, termed 'FixJ-FixK2-FixK1.' FixJ positively regulates FixK2, which activates nitrogen respiration genes as well as FixK1. FixK1 mutants are unable to respire from nitrogen due to a defective catatylic copper subunit (Cu-z) in nosRZDFYLX. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Bradyrhizobium japonicum」の詳細全文を読む
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