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. 1985 Oct 11;13(19):7107–7118. doi: 10.1093/nar/13.19.7107

The majority of minicircle DNA in Crithidia fasciculata strain CF-C1 is of a single class with nearly homogeneous DNA sequence.

L Birkenmeyer, H Sugisaki, D S Ray
PMCID: PMC322026  PMID: 2997738

Abstract

DNA minicircles found within the kinetoplast of the trypanosomatid Crithidia fasciculata, like those of most other kinetoplastid species, are heterogeneous in sequence. The pattern of minicircle DNA fragments generated by cleavage of kinetoplast DNA with various restriction enzymes has been used to demonstrate this heterogeneity. Here we describe a strain of Crithidia fasciculata in which more than 90% of the DNA minicircles exhibit a common pattern of restriction enzyme cleavage sites. A map of cleavage sites within this major minicircle DNA class is presented for seven restriction enzymes with hexanucleotide recognition sequences. Sequence homogeneity at an even finer level is reflected in minicircle DNA digestion patterns generated by restriction enzymes with tetranucleotide recognition sites. Partial DNA sequence analysis of multiple clones from the major minicircle class shows nearly complete homogeneity at the nucleotide level. The existence of a near homogeneous complement of DNA minicircles in Crithidia should facilitate the study of their replication in this organism.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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