Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Bacterial Gliding Motility

박테리아의 활주운동

  • 조경연 (호서대학교 생명과학과)
  • Published : 2002.09.01
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Abstract

Gliding motility is defined as the movement of nonflagellated cells in the direction of its long axis on a solid surface and found in many phylogenetically diverse bacteria. Genetic, biochemical, ultrastructural, and behavioral studies have provided a wealth of information related to the mechanism of possible gliding apparatuses. Social motility of Myxococcus xanthus and the gliding of Synechocystis appear to rely on the function of type IV pili, similar to twitching motility of pseudomonas aeruginosa and Neisseria gonorrhoeae. In contrast, adventurous motility of M. xanthus and the gliding of filamentous cyanobacteria and Flavobacterium are not dependent on the pili. Instead, they appear to employ novel motility mechanisms that are currently being unveiled.

활주운동은 편모의 작용없이 고체의 표면을 미끄러지듯이 이동하는 박테리아의 운동방식으로 분류학상 다양한 종의 박테리아에서 발견된다. 지금까지 밝혀진 바에 의하면 활주 운동은 type IV pili(Tfp)를 필요로 하는 경우와 이를 필요로 하지 않는 두 가지로 크게 구분될 수 있는데, Tfp를 필요로 하는 경우에는 T룰의 확장과 수축에 의해 이루어지는 twitching motility와 운동기작이 흡사할 것으로 추정된다 Tfp를 필요로 하지 않는 활주운동에 대해서는 여러 다양한 모델이 제시되었는데, 이중 한 모델은 활주박테리아가 점액을 분출함으로서 추진력을 얻어 앞으로 진행한다는 설명이며, 다른 모델들은 외벽에 세포 전체를 감싸는 운동기구가 존재한다는 것이다. 이와 같이 활주운동은 일반적으로 잘 알려진 편모에 의한 운동과는 전혀 다른 운동방식에 의해 이루어지는데, 그 작용 기작이 매우 흥미로운 반면에 많은 부분들이 풀어야 될 숙제로 남아있어 앞으로의 연구결과들이 기대된다.

Keywords

References

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