A photosystem other than PS370 also mediates the negative phototaxis of Halobacterium halobium
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چکیده
منابع مشابه
Genetic variability in Halobacterium halobium.
Halobacterium halobium exhibits an extraordinary degree of spontaneous variability. Mutants which are defective in the formation of gas vacuoles (vac) arise at a frequency of 10(-2). Other easily detectable phenotypes, like the synthesis of bacterioruberin (Rub) or the synthesis of retinal (Ret) and bacterio-opsin (Ops), the two components which form the purple membrane (Pum) of H. halobium, ar...
متن کاملIntegration of photosensory signals in Halobacterium halobium.
Stimulation of Halobacterium halobium through its sensory photosystems, PS 370 and PS 565, leads either to a prolonged or to a shortened interval between two reversals of the swimming direction of the cell, the attractant or repellent response. Stimuli are integrated to yield the same response regardless through which photosystem they are given. Simultaneously elicited attractant and repellent ...
متن کاملBacterio-opsin mutants of Halobacterium halobium.
The bacterio-opsin (bop) gene of Halobacterium halobium R1 has been cloned with about 40 kilobases of flanking genomic sequence. The 40-kilobase segment is derived from the (G+C)-rich fraction of the chromosome and is not homologous to the major (pHH1) or minor endogenous covalently closed circular DNA species of H. halobium. A 5.1-kilobase Pst I fragment containing the bop gene was subcloned i...
متن کاملLight 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 ............... ....
متن کاملStructure of the cell envelope of Halobacterium halobium
The structure of the isolated cell envelope of Halobacterium halobium is studied by X-ray diffraction, electron microscopy, and biochemical analysis. The envelope consists of the cell membrane and two layers of protein outside. The outer layer of protein shows a regular arrangement of the protein or glycoprotein particles and is therefore identified as the cell wall. Just outside the cell membr...
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ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 1985
ISSN: 0378-1097
DOI: 10.1016/0378-1097(85)90144-2