In:
Applied and Environmental Microbiology, American Society for Microbiology, Vol. 65, No. 6 ( 1999-06), p. 2644-2649
Kurzfassung:
From a pool of 600 temperature-sensitive transposon mutants of Pseudomonas putida P8, 1 strain was isolated that carries a mini-Tn 5 insertion within the cytochrome c operon. As a result, genes involved in the attachment of heme to cytochrome c -type proteins are turned off. Accordingly, cytochrome c could not be detected spectrophotometrically. The mutant also exhibited a remarkable reduction of cis-trans isomerization capability for unsaturated fatty acids. Consistent with the genetic and physiological data is the detection of a cytochrome c -type heme-binding motif close to the N terminus of the predicted polypeptide of the cis/trans isomerase ( cti ) gene ( C VA CH ; conserved amino acids in italics). The functional significance of this motif was proven by site-directed mutagenesis. A possible mechanism of heme-catalyzed cis-trans isomerization of unsaturated fatty acids is discussed.
Materialart:
Online-Ressource
ISSN:
0099-2240
,
1098-5336
DOI:
10.1128/AEM.65.6.2644-2649.1999
Sprache:
Englisch
Verlag:
American Society for Microbiology
Publikationsdatum:
1999
ZDB Id:
223011-2
ZDB Id:
1478346-0
SSG:
12
Permalink
