Terminal oxidases of the bb- and caa3-types in Bacillus sp. FTU.
We previously identified two oxidases in the membranes of bacterium Bacillus sp. FTU. One of them slowly (caa3) and the other rapidly (bo) recombines with carbon monoxide (CO) after laser flash photolysis, in this respect resembling the Escherichia coli bo- and bd-type oxidases, respectively. In the present study we found three copper atoms in the slowly CO-recombining oxidase from Bacillus sp. FTU. In the other oxidase, the copper content is very low and clearly substoichiometric. Reversed-phase chromatography revealed the presence of haems A and C in the Bacillus sp. FTU copper-containing oxidase and haems B and C in the non-copper-containing one. We thus suggest that the Bacillus sp. FTU oxidase rapidly reacting with CO previously attributed to bo-type by analogy in redox spectrum with the E. coli enzyme be redefined as bb-type oxidase.
Muntyan
M S
MS
A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Russia.
Ustiyan
V S
VS
Viryasov
M B
MB
Skulachev
V P
VP
D001407:Bacillus / Q000201:enzymology*; D002248:Carbon Monoxide / Q000378:metabolism; D002462:Cell Membrane / Q000201:enzymology; D002851:Chromatography, High Pressure Liquid; D003300:Copper / Q000032:analysis; D003576:Electron Transport Complex IV / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism*; D004926:Escherichia coli / Q000201:enzymology; D006418:Heme / Q000032:analysis; D007527:Isoenzymes / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism*; D007834:Lasers; D010782:Photolysis; D013053:Spectrophotometry
D007527:Isoenzymes; D006418:Heme; D003300:Copper; D002248:Carbon Monoxide; C038862:cytochrome o oxidase; D003576:Electron Transport Complex IV