Abstract
Mycoplasma pneumoniae is a pathogen which can cause human pneumonia. It has a unique gliding machinery at the anterior part along the gliding direction. The machinery is composed of the internal and surface structures. The surface structure called “NAP” is composed of P1 adhesin and responsible for the binding involved in the gliding. However, the structure is still unclear. In the present study, we observed the surface structure by quick-freeze deep-etch (QFDE) method. On the surface of gliding machinery, the NAPs were observed as “atoll” protrusion 12.5 ± 3.2 nm in diameter, arrayed in a lattice with 9.2 ± 2.8 nm intervals, in the density of 20 particles in 100 nm square (Figure). The detailed analyses and the visualization of the internal structures are undertaken. ...
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