Sequence analyses of a lipoprotein conserved with bacterial actins responsible for swimming motility of wall-less helical .

is a genus of pathogenic or commensal cell-wall-deficient helical bacterium. -specific protein fibril and five classes of bacterial actins, MreB1-5, are involved in a helical ribbon structure responsible for helical-cell morphology and swimming motility. A gene for a hypothetical protein-SPE_1229, 7th protein-has been found in the locus coding s. In this study, we characterized the 7th protein using methods and found that it could be a lipoprotein whose gene is encoded downstream of and conserved in a clade of .