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Florence Arsènea P.Alexandre Kaminskia Claudine Elmericha 《FEMS microbiology letters》1999,179(2):339-343
It was previously reported that the N-terminal domain of Azospirillum brasilense NifA was a negative regulator of the NifA activity and that the P(II) protein prevented this inhibition under nitrogen fixing conditions. Here, we show that a mutation of a single Tyr residue at position 18 of the N-terminal domain of NifA led to an active NifA protein that did not require P(II) for activation under nitrogen fixation conditions. 相似文献
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