Rhodopseudomonas spheroids

Hydroxy butyrate dehydrogenase (from Rhodopseudomonas spheroides) [9028-38-0] Mf 85,000, [EC 1.1.1.30], amorphous. Purified by two sequential chromatography steps on two triazine dye-Sepharose matrices. [Scavan et al. Biochem J 203 699 7952.]... 

In the anaerobic photoheteio iophRhodobacter(Rhodopseudomonas) spheroides, a molybdenum enzyme in which the metal is coordinated by two equivalents of a pyranopterin cofactor is involved in sequential oxidations and reductions involving Mo(VI), Mo(V), and Mo(IV) (Cobb et al. 2005). 

Rhodopseudomonas palustris Rhodopseudomonas spheroides Rhodospirillum rubrum... 

The reaction scheme in Fig. 9-17 depicts isoleucine (E) synthesis from aspartate (A) by the bacterium Rhodopseudomonas spheroides. The control is called sequential feedback control. Describe the operation of this metabolic control system. 

The electrical term in the chemical potential of H+ can also power ATP formation. For instance, when an EM of 0.16 V is artificially created across lamellar membranes, ATP formation can be induced in the dark. This is consistent with our prediction that an electrical potential difference of at least 0.13 V is necessary (Fig. 6-6). In chloroplast thylakoids, EM in the light is fairly low, e.g., near 0.02 V in the steady state (see Fig. 6-5). However, the electrical term can be the main contributor to A/xh for the first 1 or 2 seconds after chloroplasts are exposed to a high photosynthetic photon flux (PPF). The electrical component of the H+ chemical potential difference can be large for the chromatophores of certain photosynthetic bacteria such as Rhodopseudomonas spheroides, for which Em can be 0.20 V in the light in the steady state. 

A different factor was isolated from Rhodopseudomonas spheroides by Orlando (114) which only stimulated the light-driven transhydrogenase reaction and could be replaced by thiols (116). 

Dutton, P. L., and Jackson, J. B., 1972, Thermodynamic and kinetic characterization of electron transfer components in situ in Rhodopseudomonas spheroides and Rhodospirillum rubrum, Eur. J. Biochem. 30 495n510. 

Prince, R. C., Cogdell, R. J., and Crofts, A. R., 1974, The photo-oxidation of horse heart cytochrome c and native cytochrome 2 by reaction centers from Rhodopseudomonas spheroides R26. Biochim. Biophys. Acta, 347 lnl3. 

Wraight, C. A., and Clayton, R. K., 1973, The absolute quantum efficiency of bacteriochloro-phyll photooxidation in reaction centres of Rhodopseudomonas spheroides. Biochim. Biophys. Acta, 333 2469260. 

Fig. 7. Redox-titration ourves of the reaction centers in (A) Rb. sphaeroides, (B) Cf. aurantiacus, (C) Rp. viridis and (D) Chromatium. See text for other details. Figure sources (A) Dutton and Jackson (1972) Thermodynamic and kinetic characterization of electron-transfer components in situ in Rhodopseudomonas spheroides and Rhodospiriiium rubrum. Eur J Biochem. 39 500 (B) Bruce, Fuiler and Biankenship (1982) Primary photochemistry in the facultatively aerobic green photosynthetic bacterium Chloroflexus aurantiacus. Proc Nat Acad, USA. 79 6533 (C) Prince, Leigh and Dutton (1976) Thermodynamic properties ofthe reaction center of Rhodopseudomonas viridis. Biochim Blophys Acta. 440 625 (D) Cusanovich, Bartsch and Kamen (1968) Light-induced electron transport In Chromatium. II. Light-induced absorbance changes in Chromatium chromatophores. Biochim Biophys Acta 153 408.

JB Jackson and AR Crofts (1969) The high energy state in chromatophores from Rhodopseudomonas spheroides. FEBS Lett 4 185-189... 

Sakato, K., Tanaka, H., Shibata, S., and Kuratsu, Y., Agitation-aeration studies on coenzyme Q10 production using Rhodopseudomonas Spheroides, Biotechnol. Appl. Biochem., 16 19 (1992)... 

Hydroxybutyrate Dehydrogenase Origin Rhodopseudomonas spheroides Fluka... 

Shneour EA (1962a) Carotenoid pigment conversion in Rhodopseudomonas spheroides. Biochim Biophys Acta 62 534-540... 

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