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  • 1985-1989  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    The nifA gene product from Rhizobium leguminosarum biovar trifolii lacks the N-terminal domain found in other NifA proteins (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 3 (1989), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The nifA gene has been identified between the fixX and nifB genes in the clover microsymbiont Rhizobium leguminosarum biovar trifolii (R.I. bv. trifolii) strain ANU843. Expression of the nifA gene is induced in the symbiotic state and site-directed mutagenesis experiments indicate that nifA expression is essential for symbiotic nitrogen fixation. Interestingly, the predicted R.I. bv. trifolii NifA protein lacks an N-terminal domain that is present in the homologous proteins from R.I. bv. viciae, Rhizobium meliloti, Brady rhizobium japonicum, Klebsiella pneumoniae and all other documented NifA proteins. This indicates that this N-terminal domain is not essential for NifA function in R.I. bv. trifolii.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1989.tb00244.x
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  • 2
    Electronic Resource
    Electronic Resource
    Molecular linkage of the nifl fix and nod gene regions in Rhixobium leguminosarum biovear trifolii (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 3 (1989), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Nucleotide sequence analysis of a 2.5kb region downstream of the nifA gene from Rhizobium leguminosarum biovar trifolii has resulted in linkage, at the DNA sequence level, of the nifEN, nifHDK, fixABCX, nifA gene cluster with the nodEF, nodD, nodABCIJ genes. Four genes have been identified within this intervening region. Immediately 3’to the nifA gene is the nifB gene and the nifB-linked ferredoxin-encoding fdxN gene. Downstream of fdxN in R. leguminosarum bv. trifolii and in Rhizobium meliloti, we have identified an open reading frame which has not been described previously and which we propose to designate fixU. Downstream of fixU in R. leguminosarum by. trifolii is a nod gene, nodT, which is contiguous with nodJ (B. Surin et al., manuscript in preparation). As a result of this study, the linkage relationships of 22 symbiotic genes spanning a 24 kb region of the symbiotic plasmid from R. leguminosarum bv. trifoiii are now known.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1989.tb00161.x
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    Paper (German National Licenses)
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