Document Detail

Structure of extrachromosomal circular DNAs containing both the Alu family of dispersed repetitive sequences and other regions of chromosomal DNA.
MedLine Citation:
PMID:  6325708     Owner:  NLM     Status:  MEDLINE    
Small polydisperse circular DNA (spcDNA) isolated from the BSC-1 line of African Green monkey kidney cells was digested with the restriction endonuclease BamHI and cloned in bacteriophage lambda. The resulting library of 25,000 phage was then screened for the presence of the Alu family of short interspersed nucleotide sequences, and four of the 100 Alu-positive clones were characterized. In summary: (1) all four clones contained regions other than Alu that were homologous to the BSC-1 chromosome. Two contained Alu plus unique chromosomal DNA, one contained Alu plus an uncharacterized repetitive chromosomal DNA, and one contained Alu plus both unique and a specific tandemly repeated chromosomal DNA (alpha-satellite); (2) all four clones were derived from extrachromosomal circular DNAs and not from the accidental cloning of a very small amount of contaminating chromosomal material assumed to be present in spcDNA preparations; and (3) one clone represented an intact circular DNA with a restriction endonuclease cleavage map that was a circularly permuted version of its chromosomal homologue.
J J Krolewski; C W Schindler; M G Rush
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of molecular biology     Volume:  174     ISSN:  0022-2836     ISO Abbreviation:  J. Mol. Biol.     Publication Date:  1984 Mar 
Date Detail:
Created Date:  1984-06-01     Completed Date:  1984-06-01     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  2985088R     Medline TA:  J Mol Biol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  41-54     Citation Subset:  IM    
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MeSH Terms
Cell Line
Cercopithecus aethiops
Cloning, Molecular
DNA Restriction Enzymes
DNA, Circular / genetics*
Kidney / cytology
Microscopy, Electron
Models, Genetic
Repetitive Sequences, Nucleic Acid*
Grant Support
Reg. No./Substance:
0/DNA, Circular; EC 3.1.21.-/DNA Restriction Enzymes

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