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. 1988 Jul 11;16(13):5863–5878. doi: 10.1093/nar/16.13.5863

Genome organization of the killer plasmid pGK12 from Kluyveromyces lactis.

M Tommasino 1, S Ricci 1, C L Galeotti 1
PMCID: PMC336834  PMID: 3041369

Abstract

We have determined the entire sequence of the plasmid K2 from Kluyveromyces lactis which is involved in the maintenance of both killer plasmids in the cell. K2 shares many of the characteristics of the smaller killer plasmid K1: high A+T content (74.7%) and very compact genomic organization. K2 contains ten open reading frames. Some of them overlap on different strands and some on the same strand. Northern blotting of K2 transcripts shows that at least eight ORFs are transcribed. Analysis of the predicted aminoacid sequence of ORF2 from K2 reveals homology with the aminoacid sequence of ORF 1 from K1 and with several viral DNA polymerases. The sequence of K2 from Saccaromyces cerevisiae F102-2 was also determined. Only one nucleotide difference was found between the K2 sequence from the two yeasts. This mutation does not change the genome organization of the plasmid and has only minimal effect on the structure of the encoded proteins.

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Selected References

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