Linked Life Data

4029619

Source:http://linkedlifedata.com/resource/pubmed/id/4029619

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1985-10-3
pubmed:databankReference
pubmed:abstractText
Recent studies have shown that transcription occurs discontinuously for many genes in Trypanosoma brucei. To further investigate details of transcription in trypanosomes, the genes for the 5S ribosomal RNA from Trypanosoma brucei rhodesiense and Trypanosoma brucei brucei were cloned. Sequence analysis and Southern blotting showed the genes to be arranged in highly conserved tandem repeats of approx. 740 bp, which have no relation to the conserved 35-base spliced-leader repeat element. The genes contain internal control regions similar to 5S genes of other species, and studies of the 5S gene transcript show that it does not contain the conserved 35-base spliced-leader found at the 5' end of other trypanosome transcripts. Moreover, the 5S rRNA can be capped by guanylyltransferase from vaccinia virus, indicating that it has a 5' di- or triphosphate terminus. These results strongly suggest that the spliced-leader does not take part in the transcription of the 5S gene and that discontinuous transcription may be limited to particular classes of transcripts determined, as in other species, by the type of RNA polymerase used in their transcription. The DNA sequences of the 5S gene repeat from T.b. brucei and T.b. rhodesiense are presented, and their evolutionary significance is discussed.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0378-1119
pubmed:author
pubmed:issnType
Print
pubmed:volume
35
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
131-41
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Characterization of the Trypanosoma brucei 5S ribosomal RNA gene and transcript: the 5S rRNA is a spliced-leader-independent species.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't