Is biofilm associated protein (bap) gene expression influence by Iron concentrations ?

There is no information so far on bap gene expression influences by iron concentration in Acinetobacter baumannii. In our research which carried out by my PhD student for three years, we found that in low iron expression of bap gene was increased four fold by relative quantitative RT-PCR. The paper has been published in Reports of Biochemistry & Molecular Biology 2016; 5(1):62-71.

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There is interesting to now for nature microbial community that the iron may control the amount of biofilm formation. One factor that effect the quantity of biofilm is expression of bap gene. in our research we sequenced bap gene from Acinetobacter baumannii and deposited in the GenBank database (accession no. KR080550.1). Expression of bap in the presence of low iron was analyzed by relative quantitative real time PCR (rqRT-PCR). Nearly half of the isolates belonged to RAPD-types A and B remaining were either small clusters or singleton. The results of biofilm formation revealed that 23 (35.4%), 18 (27.7%), 13 (20%), and 11 (16.9%) of the isolates had strong, moderate, weak, and no biofilm activities, respectively. ompA and csuE genes were detected in all, while bap and blaPER-1 were detected in 43 (66%) and 42 (64%) of the isolates that showed strong and moderate biofilm activities (p ≤ 0.05), respectively. Analysis of bap expression by rqRT-PCR revealed five isolates with fourfold bap overexpression in the presence of low iron concentration (20 µM).

Mohammad reza Shakibaie

Professor and senior research scientist at kerman university of medical sciences, Kerman University of Medical Sciences

M.R. Shakibaie earned his PhD from University of Pune India from 1992 to 1997. His thesis was lecular genetics of Plasmid Mediated Silver and Antibiotic Resistances in Acinetobacter baumannii”. He completed one year Postdoctoral research training at Aquatic Microbial Lab in Mysore, India during 2006. His research title was Horizontal Gene Transfer in Gram Negative Bacteria. Dr. Shakibaie Joined the Department of Microbiology, Kerman University of Medical Sciences in 1998. He has published more than 45 original research papers in different International peer reviewed journals with high impact factors in microbiology and biotechnology. The total impact factor of his research is more than 68, with h-index 11 and i10-index 12. His work is cited more than 296 times ( The research gate score index is 21.85. His work also has been cited in 3 textbooks of microbiology published from USA and Europe. He has presented more than 42 papers in International and National Conferences. He has made fundamental contributions in the area of gene transfer, plasmid biology, molecular microbiology, nanomicrobiology. He is on the editorial board of number of peer reviewed journals in Iran and abroad. He has successfully supervised 2 Ph.D., and 1 Post-Doctoral scholars for their research. Currently 2 Ph.D. students are working with him.

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