Photochemical Reaction of Ubiquinone (35). I. Formation of Demethyl-ubiquinone (35).
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Ubiquinone binding, ubiquinone exclusion, and detailed cofactor conformation in a mutant bacterial reaction center.
The X-ray crystal structure of a Rhodobacter sphaeroides reaction center with the mutation Ala M260 to Trp (AM260W) has been determined. Diffraction data were collected that were 97.6% complete between 30.0 and 2.1 A resolution. The electron density maps confirm the conclusions of a previous spectroscopic study, that the Q(A) ubiquinone is absent from the AM260W reaction center (Ridge, J. P., v...
متن کاملSpecific interaction between protein and ubiquinone in succinate-ubiquinone reductase.
The lack of ubiquinone in the isolated succinate-ubiquinone reductase (Complex II) and in some preparations of ubiquinone-binding protein (QPs) has caused some concern about the nature of interaction between ubiquinone and QPs. When a low concentration of radioactively labeled ubiquinone derivative in dilute detergent solution was incubated with delipidated or intact succinate-ubiquinone reduct...
متن کامل35 . The Tryptophanase - tryptophan Reaction
The facts described by Happold &'Hoyle [1936] and Evans et al. [1941] can be concisely stated as follows: (1) In a complex medium (e.g. bouillon, casein-digest, etc.) in which the presence of glucose in sufficient amount inhibits completely the production of indole by B. coli, the complete tryptophanase system is absent from the cells. (2) With a simple salt medium as used by Fildes, glucose on...
متن کاملSubsystem: Ubiquinone Biosynthesis
Quinones are widely distributed in nature. They are best known as lipid-soluble components of membrane-bound electrontransport chains, but in animal cells ubiquinone is found not only in the inner mitochondrial membrane but also in the endoplasmic reticulum, Golgi apparatus, lysosomes, peroxisomes, and in the plasma membrane. This distribution suggests that ubiquinones may be involved in a numb...
متن کاملThe ubiquinone content of animal tissues. A survey of the occurrence of ubiquinone in vertebrates.
1. A method was developed for the analysis of ubiquinone in animal tissues and the recovery of added ubiquinone tested in liver of the rat, Crocodylus porosus and Squalus acanthias. 2. The ubiquinone content of heart, liver and gut (or breast muscle in birds) was measured in 67 different animal species, selected to be representative of all the vertebrate classes. 3. The suggestion is advanced t...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1963
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.11.815