Influence of oxidation state on iron binding by Bacillus licheniformis capsule.

摘要: We examined ferric (Fe3+) and ferrous (Fe2+) iron binding by the anionic gamma-glutamyl capsule polymer of Bacillus licheniformis ATCC 9945. The addition FeCl3 to B. under aerobic conditions resulted in flocculation due capsule-induced formation amorphous, rust-colored ferrihydrite. Significant iron, which could be attributed both ferrihydrite precipitate, occurred. In contrast, FeCl2 anaerobic significantly less being bound no color change or occurring. Capsule-bound partially released upon several reducing agents. From these observations, it can concluded that oxidation state influences its tendency bacterial polymers such as capsules.