The importance of chlorophyll (Chl) to the process of photosynthesis is obvious, and there is
clear evidence that the regulation of Chl biosynthesis has a significant role in the regulation …

Purple bacteria control the level of expression and the composition of their photosystem
according to light and redox conditions. This control involves several regulatory systems that …

Purple aerobic anoxygenic phototrophs (AAPs) are the only organisms known to capture
light energy to enhance growth only in the presence of oxygen but do not produce oxygen …

Photosynthesis (PS) in purple non-Sulfur bacteria (PNSB) is strictly controlled to avoid
energy consumption and to prevent oxidative stress when oxygen is present. PpsR, a …

PpsR from the anoxygenic phototrophic bacterium Rhodobacter sphaeroides has been
known as an oxygen-and light-dependent repressor of bacteriochlorophyll and carotenoid …

In the absence of a tight control of copper entrance into cells, bacteria have evolved different
systems to control copper concentration within the cytoplasm and the periplasm. Central to …

Two genes encoding structurally similar C opper P1B‐type ATPases can be identified in
several genomes. Notwithstanding the high sequence and structural similarities these …

The two closely related bacteria Bradyrhizobium and Rhodopseudomonas palustris show
an unusual mechanism of regulation of photosystem formation by light thanks to a …

Heavy metal ion pollution and oxygen deficiency are major environmental risks for
microorganisms in aqueous habitat. The potential of purple non-sulfur photosynthetic …

The appearance of oxygen in the Earth's atmosphere via oxygenic photosynthesis required
strict anaerobes and obligate phototrophs to cope with the presence of this toxic molecule …