Thiobacillus novellus cytochrome c oxidase contains one heme alpha molecule and one copper atom per catalytic unit.

Abstract:

:The minimal structural unit of cytochrome c oxidase purified from Thiobacillus novellus was composed of one molecule each of two subunits with molecular masses of 32 and 23 kDa, respectively, and the unit had one molecule of heme a and one atom of copper. In the presence of n-octyl-beta-D-thioglucoside, the oxidase existed as the monomeric form of the unit, while it occurred as the dimeric form of the unit in the presence of Tween 20. The monomeric form showed an active cytochrome c oxidizing activity and reduced molecular oxygen to water with ferrocytochrome c. Namely, it has been shown that the bacterial cytochrome c oxidase with one heme a molecule and one copper atom per molecule can catalyze oxidation of ferrocytochrome c with concomitant reduction of molecular oxygen to water.

journal_name

J Biochem

journal_title

Journal of biochemistry

authors

Shoji K,Yamazaki T,Nagano T,Fukumori Y,Yamanaka T

doi

10.1093/oxfordjournals.jbchem.a123717

keywords:

subject

Has Abstract

pub_date

1992-01-01 00:00:00

pages

46-53

issue

1

eissn

0021-924X

issn

1756-2651

journal_volume

111

pub_type

杂志文章