Linked Life Data

2808366

Source:http://linkedlifedata.com/resource/pubmed/id/2808366

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
30
pubmed:dateCreated
1989-11-27
pubmed:databankReference
pubmed:abstractText
We have sequenced a 7.1-kilobase fragment of the Trypanosoma brucei RNA polymerase (pol) I largest subunit gene. The 6.9-kilobase transcript from this gene is of roughly equal abundance in bloodstream- and procyclic-form trypanosomes and has a 39-nucleotide trans-spliced leader 290 nucleotides upsteam of the putative initiation codon. The 1781-amino acid trypanosome pol I polypeptide is considerably less similar to its yeast homolog than the trypanosome pol II and pol III polypeptides are to their counterparts in yeast. The yeast and trypanosome pol I polypeptides are distinguished from pol II and pol III largest subunits by two inserts, 100-200 amino acids in length, which are found in the nonconserved portions of the polypeptides. We also report our sequence of the trypanosome pol III largest subunit gene, which agrees with that reported by Köck et al. (Köck, J., Evers, R., and Cornelissen, A.W.C.A. (1988) Nucleic Acids Res. 16, 8753-8772) except for 13 nucleotide differences. Four spliced leader addition sites between 60 and 99 nucleotides upstream of the AUG initiation codon were observed for the 5.4-kilobase transcript from this gene. Four short stretches of amino acid homology between the yeast and trypanosome pol III largest subunit polypeptides were identified which appear to be specific to this class of RNA polymerase; only one short pol I-specific sequence was identified in our comparison of the yeast and trypanosome pol I largest subunit polypeptides.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
25
pubmed:volume
264
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
18091-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Molecular characterization of the Trypanosoma brucei RNA polymerase I and III largest subunit genes.
pubmed:affiliation
Intercampus Program in Molecular Parasitology, School of Pharmacy, University of California, San Francisco 94143-1204.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.