THE 44-KDA C-TYPE CYTOCHROME INDUCED IN RHODOBACTER-CAPSULATUS DURING GROWTH WITH DIMETHYLSULFOXIDE AS AN ELECTRON-ACCEPTOR IS A CYTOCHROME-C PEROXIDASE

被引：20

作者：

HANLON, SP

HOLT, RA

MCEWAN, AG

机构：

[1] UNIV E ANGLIA,SCH BIOL SCI,NORWICH NR4 7TJ,NORFOLK,ENGLAND

[2] ICI BIOPROD & FINE CHEM,BILLINGHAM,ENGLAND

来源：

FEMS MICROBIOLOGY LETTERS | 1992年 / 97卷 / 03期

关键词：

RHODOBACTER-CAPSULATUS; CYTOCHROME-C PEROXIDASE; DIMETHYLSULFOXIDE; ELECTRON TRANSPORT;

D O I：

10.1111/j.1574-6968.1992.tb05476.x

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

A 44-kDa c-type cytochrome was purified from membranes of Rhodobacter capsulatus. The cytochrome contained an ascorbate-reducible haem (alpha-max 556 nm) and a dithionite-reducible haem (alpha-max 552 nm) and had catalytic properties which indicated that it was a cytochrome c peroxidase. Increased levels of this cytochrome were observed when dimethylsulphoxide was present during phototrophic growth of cells but this was not observed when trimethylamine-N-oxide was present. The results indicate that the 44-kDa cytochrome is probably not directly involved in the dimethylsulphoxide/trimethylamine-N-oxide respiratory pathway of Rhodobacter capsulatus.

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页码：283 / 288

页数：6

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