21097617
not annotated - annotated - LINNAEUS only
Isolation and characterization of P1 adhesin, a leg protein of the gliding bacterium Mycoplasma pneumoniae.
Mycoplasma pneumoniae, a pathogen causing human pneumonia, binds to solid surfaces at its membrane protrusion and glides by a unique mechanism. In this study, P1 adhesin, which functions as a "leg" in gliding, was isolated from mycoplasma culture and characterized. Using gel filtration, blue-native polyacrylamide gel electrophoresis (BN-PAGE), and chemical cross-linking, the isolated P1 adhesin was shown to form a complex with an accessory protein named P90. The complex included two molecules each of P1 adhesin and P90 (protein B), had a molecular mass of about 480 kDa, and was observed by electron microscopy to form 20-nm-diameter spheres. Partial digestion of isolated P1 adhesin by trypsin showed that the P1 adhesin molecule can be divided into three domains, consistent with the results from trypsin treatment of the cell surface. Sequence analysis of P1 adhesin and its orthologs showed that domain I is well conserved and that a transmembrane segment exists near the link between domains II and III.
Ann file
T1 Species 85 106 Mycoplasma pneumoniae
N1 Reference T1 Taxonomy:2104
T2 Species 110 131 Mycoplasma pneumoniae
N2 Reference T2 Taxonomy:2104
T3 Species 152 157 human
N3 Reference T3 Taxonomy:9606
T4 Species 348 358 mycoplasma
N4 Reference T4 Taxonomy:2104