Linked Life Data

6123210

Source:http://linkedlifedata.com/resource/pubmed/id/6123210

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10-11
pubmed:dateCreated
1982-7-8
pubmed:abstractText
Essentially all polypeptides synthesized in the cytoplasm and imported into either the matrix or into the inner or outer membrane of mitochondria are made as larger molecular weight precursors. All known examples of in vivo or in vitro synthesized precursors are summarized. Little information on the nature of the proteolytic enzymes involved in the processing of the larger precursor polypeptides exists. The biosynthesis of rat liver cytochrome c oxidase is discussed in detail. In contrast to reported data, the cytoplasmic subunits of rat liver cytochrome c oxidase are synthesized as larger molecular weight precursors and not as a polyprotein. Precursors to subunits IV and V show an extra-peptide sequence of about 3000 daltons. Evidence against the existence of a polyprotein precursor was also obtained, when messenger RNAs for the individual subunits IV and V were isolated and analyzed in respect to their size. A length of 990 +/- 80 and 830 +/- 70 nucleotides was estimated for the poly(A)+-RNA of cytochrome c oxidase subunits IV and V, respectively. In experiments on the site of synthesis, it was found that cytochrome c oxidase subunits IV and V are made on free, loosely and tightly membrane-bound polyribosomes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0001-5318
pubmed:author
pubmed:issnType
Print
pubmed:volume
40
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1451-63
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1981
pubmed:articleTitle
Proteolytic precursor processing in the biosynthesis of mitochondria.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't