Abstract:
:We report on a system to improve expression of mature c-type cytochromes in Escherichia coli. It is based on the use of plasmid pEC86 that expresses the E. coli cytochrome c maturation genes ccmABCDEFGH constitutively, whereby the production of both endogenous and foreign c-type cytochromes was increased substantially. The periplasmic soluble domains of the c-type cytochrome subunits FixO and FixP of the Bradyrhizobium japonicum cbb3 oxidase could be expressed in E. coli only when pEC86 was provided in a degP-deficient strain. This shows that a stimulation of heme attachment by the Ccm maturase system combined with the diminished proteolytic activity in the periplasm can increase c-type cytochrome yields.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Arslan E,Schulz H,Zufferey R,Künzler P,Thöny-Meyer Ldoi
10.1006/bbrc.1998.9549subject
Has Abstractpub_date
1998-10-29 00:00:00pages
744-7issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(98)99549-3journal_volume
251pub_type
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