標題: Surface Rigidity Change of Escherichia coli after Filamentous Bacteriophage Infection
作者: Chen, Yi-Yang
Wu, Chien-Chen
Hsu, Jye-Lin
Peng, Hwei-Ling
Chang, Hwan-You
Yew, Tri-Rung
生物科技學系
Department of Biological Science and Technology
公開日期: 21-四月-2009
摘要: In this study, the feasibility using atomic force microscopy (AFM) to study the interaction between bacteriophages (phages) and bacteria in situ was demonstrated here. Filamentous phage M 13 specifically infects the male Escherichia coli, which expresses F-pili. After infection, E. coli become fragile and grows at a slower rate. AFM provides a powerful tool for investigating these changes in a near-physiological environment. Using high-resolution AFM in phosphate-buffered saline, the damage to the lipopolysaccharide (LPS) layer on the outer membrane of the M13 phage-infected E. coli was observed. The membrane became smoother and more featureless compared to those that were not infected. Besides, the force-distance (f-d) curves were measured to reveal the surface rigidity change in E. coli after M13 phage infection. The effective spring constant and Young's modulus of E. coli decreased after M13 phage infection. Furthermore, the AFM tip was pressed against E. coli to stud), the response of E. coli under load before and after M 13 phage infection. The results showed that after infection E. coli became less rigid and the membrane was also damaged. However, the stiffness changes, including the spring constant and Young's modulus of E. coli, are negligible after M 13 phage infection compared with those in previous reports, which may be one of the reasons that E. coli still can maintain its viability after filamentous phage infection.
URI: http://dx.doi.org/10.1021/la8036346
http://hdl.handle.net/11536/7351
ISSN: 0743-7463
DOI: 10.1021/la8036346
期刊: LANGMUIR
Volume: 25
Issue: 8
起始頁: 4607
結束頁: 4614
顯示於類別:期刊論文


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