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A major facilitator superfamily (MFS) transporter-like open reading frame (ORF) of 453 bp was identified in a pathogenic strain  Acinetobacter baumannii  AIIMS 7, and its association with adherence and biofilm formation was investigated. Reverse transcription PCR (RT-PCR) showed differential expression in surface-attached biofilm cells than nonadherent cells.  In vitro  translation showed synthesis of a ~17 kDa protein, further confirmed by cloning and heterologous expression in  E. coli  DH5 α . Up to 2.1-, 3.1-, and 4.1- fold biofilm augmentation was observed on abiotic (polystyrene) and biotic ( S. cerevisiae /HeLa) surface, respectively. Scanning electron microscopy (SEM) and  gfp -tagged fluorescence microscopy revealed increased adherence to abiotic (glass) and biotic ( S. cerevisiae ) surface. Extracellular DNA(eDNA) was found significantly during active growth; due to probable involvement of the protein in DNA export, strong sequence homology with MFS transporter proteins, and presence of transmembrane helices. In summary, our findings show that the putative MFS transporter-like ORF ( pmt ) is associated with adherence, biofilm formation, and probable eDNA release in  A. baumannii  AIIMS 7.

An MFS Transporter-Like ORF from MDRAcinetobacter baumanniiAIIMS 7 Is Associated with Adherence and Biofilm Formation on Biotic/Abiotic Surface