scholarly journals Pentitol metabolism of Rhodobacter sphaeroides Si4: purification and characterization of a ribitol dehydrogenase

1992 ◽  
Vol 138 (6) ◽  
pp. 1277-1281 ◽  
Author(s):  
C. Kahle ◽  
K.-H. Schneider ◽  
F. Giffhorn
Biochemistry ◽  
1987 ◽  
Vol 26 (10) ◽  
pp. 2740-2746 ◽  
Author(s):  
Cynthia L. Cooper ◽  
Stephen G. Boyce ◽  
Donald R. Lueking

2003 ◽  
Vol 185 (17) ◽  
pp. 5295-5300 ◽  
Author(s):  
K. Kobayashi ◽  
T. Saitoh ◽  
D. S. H. Shah ◽  
K. Ohnishi ◽  
I. G. Goodfellow ◽  
...  

ABSTRACT Flagellar hook-basal body (HBB) complexes were purified from Rhodobacter sphaeroides. The HBB was more acid labile but more heat stable than that of Salmonella species, and protein identification revealed that HBB components were expressed only from one of the two sets of flagellar gene clusters on the R. sphaeroides genome, under the heterotrophic growth conditions tested here.


2008 ◽  
Vol 54 (10) ◽  
pp. 829-834 ◽  
Author(s):  
N. K. Ranjith ◽  
Ch. V. Ramana ◽  
Ch. Sasikala

An enzyme involved in the catabolism of 3,4-dihydroxyphenylalanine (DOPA) was isolated from Rhodobacter sphaeroides OU5. The enzyme catalyzes the formation of 3,4-dihydroxyphenylpyruvic acid (DOPP) and ammonia from DOPA. Formation of ammonia by DOPA oxidative deaminase was O2dependent and the enzyme isolated to its homogeneity has 100% affinity for DOPA. DOPA oxidative deaminase is functional at low concentrations of the substrate (<100 μmol·L–1) and is independent of NADH. The molecular mass of the purified enzyme is ~190 kDa and the enzyme could be a pentamer of 54, 42, 34, 25, and 23 kDa subunits as determined by SDS–PAGE.


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