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Nif11 domain This domain is found mainly in the Cyanobacteria and in Proteobacteria such as the nitrogen-fixing bacterium Azotobacter vinelandii. It is found in Nif11, a protein described in Azotobacter as linked to nitrogen fixation. It also constitutes a leader peptide in Nif11-derived peptides (N11P), which are thought to be post-translationally modified microcins derived from a putative nitrogen-fixing protein. N11P sequences have a classic leader peptide cleavage motif, usually Gly-Gly, which marks the end of family-wide similarity area and the beginning of a low-complexity region rich in Cys, Gly and Ser.
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