Linked Life Data

10092599

Source:http://linkedlifedata.com/resource/pubmed/id/10092599

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
14
pubmed:dateCreated
1999-4-27
pubmed:abstractText
To investigate the relationship between post-translational processing of the Rieske iron-sulfur protein of Saccharomyces cerevisiae and its assembly into the mitochondrial cytochrome bc1 complex we used iron-sulfur proteins in which the presequences had been changed by site-directed mutagenesis of the cloned iron-sulfur protein gene, so that the recognition sites for the matrix processing peptidase or the mitochondrial intermediate peptidase (MIP) had been destroyed. When yeast strain JPJ1, in which the gene for the iron-sulfur protein is deleted, was transformed with these constructs on a single copy expression vector, mitochondrial membranes and bc1 complexes isolated from these strains accumulated intermediate length iron-sulfur proteins in vivo. The cytochrome bc1 complex activities of these membranes and bc1 complexes indicate that intermediate iron-sulfur protein (i-ISP) has full activity when compared with that of mature sized iron-sulfur protein (m-ISP). Therefore the iron-sulfur cluster must have been inserted before processing of i-ISP to m-ISP by MIP. When iron-sulfur protein is imported into mitochondria in vitro, i-ISP interacts with components of the bc1 complex before it is processed to m-ISP. These results establish that the iron-sulfur cluster is inserted into the apoprotein before MIP cleaves off the second part of the presequence and that this second processing step takes place after i-ISP has been assembled into the bc1 complex.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
2
pubmed:volume
274
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
9253-7
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Intermediate length Rieske iron-sulfur protein is present and functionally active in the cytochrome bc1 complex of Saccharomyces cerevisiae.
pubmed:affiliation
Department of Biochemistry, Dartmouth Medical School, Hanover, New Hampshire 03755, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.