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Acinetobacter johnsonii  is generally recognized as a nonpathogenic bacterium although it is often found in hospital environments. However, a newly identified isolate of this species from a frost-plant-tissue sample, namely,  A. johnsonii  MB44, showed significant nematicidal activity against the model organism  Caenorhabditis elegans . To expand our understanding of this bacterial species, we generated a draft genome sequence of MB44 and analyzed its genomic features related to nematicidal attributes. The 3.36 Mb long genome contains 3636 predicted protein-coding genes and 95 RNA genes (including 14 rRNA genes), with a G + C content of 41.37 %. Genomic analysis of the prediction of nematicidal proteins using the software MP3 revealed a total of 108 potential virulence proteins. Some of these proteins were homologous to the known virulent proteins identified from  Acinetobacter baumannii , a pathogenic species of the genus  Acinetobacter . These virulent proteins included the outer membrane protein A, the phospholipase D, and penicillin-binding protein 7/8. Moreover, one siderophore biosynthesis gene cluster and one capsular polysaccharide gene cluster, which were predicted to be important virulence factors for  C. elegans , were identified in the MB44 genome. The current study demonstrated that  A. johnsonii  MB44, with its nematicidal activity, could be an opportunistic pathogen to animals.   Electronic supplementary material  The online version of this article (doi:10.1186/s40064-016-2668-5) contains supplementary material, which is available to authorized users.

Genome-sequence analysis of Acinetobacter johnsonii MB44 reveals potential nematode-virulent factors