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논문 기본 정보

자료유형
학술저널
저자정보
Choi Chul Hee (Chungnam National University School of Medicine) Mun Seyoung (Dankook University) Oh Man Hwan (Dankook University)
저널정보
한국유전학회 Genes & Genomics Genes and Genomics Vol.46 No.5
발행연도
2024.5
수록면
531 - 539 (9page)
DOI
10.1007/s13258-024-01509-7

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Background Biofilm development by bacteria is considered to be an essential stage in the bacterial infection. Acinetobacter nosocomialis is an important nosocomial pathogen causing a variety of human infections. However, characteristics and specific determinants of biofilm development have been poorly characterized in A. nosocomialis. Objective The aim of this study was to investigate the factors involved in the biofilm development by A. nosocomialis. Methods Library of random transposon mutants was constructed using the Tn5 mutagenesis. The mutant strains, in which the ability of biofilm formation was significantly impaired, were screened by gentian violet staining. The roles of BfmR and BfmS were determined by constructing a bfmR and bfmS deletion mutant and analyzing the effects of bfmR and bfmS mutation on the biofilm development and motility of A. nosocomialis. Results We identified a biofilm-defective mutant in which a transposon insertion inactivated an open reading frame encoding the BfmR in a two-component regulatory system consisting of BfmR and BfmS. The bfmR mutant revealed a significant reduction in biofilm formation and motility compared to wild-type strain. Deficiency in the biofilm formation and motility of the bfmR mutant was restored by single copy bfmR complementation. In contrast, the bfmS mutant had no effect on biofilm formation. Conclusion A. nosocomialis has a two-component regulatory system, BfmRS. BfmR is a response regulator required for the initial attachment and maturation of biofilm during the biofilm development as well as the bacterial growth. BfmR could be a potential drug target for A. nosocomialis infection.

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