GntR family regulators of the pathogen of fish tuberculosis Mycobacterium marinum

► Sequence analysis and classification of the putative GntR regulators of Mycobacterium marinum, then classified them into four subfamilies. ► This study helps in extending the annotation of M. marinum GntR proteins. ► Sheds some light on the nucleotide preferences in the target-motifs of GntRs, providing important leads for initiating the experimental characterization of these proteins.