FIG. 7.

Loss of zinc transporters affects the swimming motility. Uropathogenic strain CFT073 and derivatives were tested after 18 h growth at 37°C on tryptone motility agar plates (44). (a) Image showing motility distances of the Δznu ΔzupT strain QT1555 (znu/zupT) with or without 5 μM Zn²⁺ supplementation compared to the CFT073 wild-type strain (WT). (b) Bar graph indicating distances of motility zones. Statistically different motility between the WT parent and isogenic QT1555 (Δznu ΔzupT) strain or QΤ1555 with or without Zn²⁺ are indicated by P values to the right of the figure. Other mutants—strain QT1434 (Δznu), strain QT1554 (ΔzupT), and the QT1555 znuACB-complemented strain, QT1932—were as motile as the WT parent with or without zinc supplementation (data not shown).