Linked Life Data

6716475

Source:http://linkedlifedata.com/resource/pubmed/id/6716475

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1984-6-1
pubmed:databankReference
pubmed:abstractText
The non-transcribed spacers (NTS) of the ribosomal genes of a number of organisms have been studied and were found to contain repetitive sequences. In these studies with plasmid subclones of NTS, designated p3.4, p2.6 and p1.7, which come from both 5' and 3' flanking regions of the rat ribosomal genes, respectively, it has been determined that these sequences are found elsewhere within the genome. Southern hybridization analysis has demonstrated that the 5' and 3' NTS subclones cross-hybridize, and that the cross-hybridizing regions are synonymous with the highly repetitive regions. Sequences homologous to the rat NTS were specifically localized to both 5' and 3' flanking regions as well as to a number of the introns of cloned genes including rat serum albumin, rat alpha-fetoprotein, rat casein and human serum albumin. No hybridization was detected of the 5' NTS subclone to the human Alu sequence clone, Blur 8, or to the rodent equivalent, a clone containing Chinese hamster ovary type I and II Alu sequences. However, as reported for type II Alu sequences, the subcloned rat NTS sequences contain RNA polymerase III initiation sites and also hybridize to a number of small RNAs, but not 4.5 S or 7 S RNA. Sequence analysis of two distinct repetitive regions in p1.7 has revealed a region of alternating purine-pyrimidine nucleotides, potentially of Z DNA, and stretches of repetitive sequences. The possible roles for these repetitive sequences in recombination and in maintaining a hierarchical structure for the ribosomal genes are discussed.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0022-2836
pubmed:author
pubmed:issnType
Print
pubmed:day
25
pubmed:volume
174
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
141-62
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Characterization of rat ribosomal DNA. The highly repetitive sequences that flank the ribosomal RNA transcription unit are homologous and contain RNA polymerase III transcription initiation sites.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't