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Fig. 3 | BMC Genomics

Fig. 3

From: Genome analysis of the freshwater planktonic Vulcanococcus limneticus sp. nov. reveals horizontal transfer of nitrogenase operon and alternative pathways of nitrogen utilization

Fig. 3

Structure and similarity of the nitrogenase operon among different anaerobic cyanobacteria and Vulcanococcus limneticus sp. nov. Comparison made with TBLASTX with > 50% similarity hits and 50 bp alignment lengths. The different nitrogenase proteins from nif operon are colour coded. Hypothetical and other auxiliary genes present inside the operon nif or elsewhere on the genome of the compared strains (such as ferredoxins fdxHB, XRE transcriptional regulator, fixU protein or molybdenum ABC-transporter) are coloured in grey. In the case of Cyanothece sp. PCC 7425 we show the similarity of different nif gene clusters separated by 2.5 Mb in the genome. A minimum set of nif genes is shown in the anaerobic cyanobacteria compared to V.limneticus sp. nov., being the rest of the nif genes located elsewhere in their genomes

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BMC Genomics

ISSN: 1471-2164

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