Light-regulated retinal-dependent reversible phosphorylation of Halobacterium proteins.

Analysis of Protein Phosphorylation in Halobacterium salinarum

Protein phosphorylation plays an important role in the two-component system based signal transduction pathways in bacteria and in archaea. These cascades have been identified also in the extremely halophilic archaeon Halobacterium salinarum and are well understood. Beside these protein phosphorylation events in which phosphorylation of histidine and aspartate residues are crucial, only little i...

Phosphorylation-Regulated Cell Surface Expression of Membrane Proteins

Circadian-dependent retinal light damage in rats.

PURPOSE To determine the relative susceptibility of rats to retinal light damage at different times of the day or night. METHODS Rats maintained in a dim cyclic light or dark environment were exposed to a single dose of intense green light beginning at various times. Normally, light exposures were for 8 or 3 hours, respectively, although longer and shorter periods were also used. Some animals...

Light energy conversion in Halobacterium halobium.

INTRODUCTION .............................................................. 682 PURPLE MEMBRANE ....................................................... 683 BACTEBRIORHODOPSIN: A LIGHT-DRIVEN PUMP FOR PROTONS ..... ..... 686 SECONDARY GRADIENTS: TRANSMEMBRANE MOVEMENTS OF Na+, K', AND Cl................................................................... 689 AMINO ACID TRANSPORT ............... ....

Apoptotic Membrane Blebbing Is Regulated by Myosin Light Chain Phosphorylation

The evolutionarily conserved execution phase of apoptosis is defined by characteristic changes occurring during the final stages of death; specifically cell shrinkage, dynamic membrane blebbing, condensation of chromatin, and DNA fragmentation. Mechanisms underlying these hallmark features of apoptosis have previously been elusive, largely because the execution phase is a rapid event whose onse...