Summary
Expression of the linear mitochondrial (mt) plasmid pClK1 of strain K of the ascomycete Claviceps purpurea was studied at the RNA and protein level. Using strand-specific probes two major transcripts were detected, corresponding to ORF1 and ORF2 of the plasmid, which most likely code for a DNA-polymerase and an RNA-polymerase, respectively. Primer extension experiments showed that both transcripts start at identical positions from opposite sides within the terminal inverted repeat (TIR). The initiation sequence corresponds to the proposed general mt initiation consensus-sequence. Conserved parts of the putative polymerase ORFs were expressed in an E. coli system and used to prepare antisera. In Western experiments the presence of corresponding proteins was demonstrated in a strain carrying plasmid pClK1, whereas a plasmid-free strain lacked these polypeptides. The sizes of these proteins are in good accordance with the sizes derived from the coding capacity of ORF1 and 2.
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References
Bonen L, Boer PH, Gray MW (1984) EMBO J 3:2531–2536
Bonen L, Bird S, Belanger L (1990) Plant Mol Biol 15:793–795
Chan BSS, Court DA, Vierula PJ, Bertrand H (1991) Curr Genet 20:225–237
Chen EJ, Seeburg PH (1985) DNA 4:165–170
Dohmen G, Gessner-Ulrich K, Tudzynski P (1991) In: Esser K, Behnke HD, Kubitzki K, Runge M, Ziegler H (eds) Progress in Botany, Springer Verlag, Berlin, pp 244–260
Düvell A (1988) Struktur und Funktion linearer Plasmide bei dem phytopathogenem Ascomyceten Claviceps purpurea. Bibl. Mycol. 126,1–82
Düvell A, Hessberg-Stutzke H, Oeser B, Rogmann-Backwinkel P, Tudzynski P (1988) Mol Gen Genet 214:128–134
Esser K, Tudzynski P (1978) Theor Appl Genet 53:145–149
Esser K, Kück U, Lang-Hinrichs C, Lemke P, Osiewacz HD, Stahl U, Tudzynski P (1986) Plasmids of eukaryotes: fundamentals and applications. Springer-Verlag, Berlin
Harlow E, Lane D (1988) Antibodies: a laboratory manual. Cold Spring harbor laboratory, Cold Spring Harbor, New York
Kennell JC, Lambowitz AM (1989) Mol Cell Biol 9:3603–3613
Kuzmin EV, Levchenko IV (1987) Nucleic Acids Res 15:6758
Lowry OH, Rosebrough NJ, Farr AL, Randall R (1951) J Biol Chem 193:265
Maniatis T, Fritsch EF, Sambrook J (1982) Molecular cloning: a laboratory manual, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York
Meinhardt F, Kempken F, Kämper J, Esser K (1990) Curr Genet 17:89–95
Miller JH (1972) Experiments in molecular genetics. Cold Spring Harbor Laboratory, Cold Spring Harbor, New York
Oeser BN (1988) Untersuchungen zur Molekularbiologie linearer Plasmide bei Claviceps purpurea. PhD thesis Bochum
Oeser BN, Tudzynski P (1989) Mol Gen Genet 217:132–140
Osiewacz HD (1984) Mitochondriale Mosaikgene: Strukturaufklärung eines mobilen Introns aus dem Ascomyceten Podospora anserina. Bibl Mycol 94:pp 1–113
Rosenberg AH, Dunn JJ, Studier FW (1986) J Mol Biol 189:113–130
Samac DA, Leong SA (1989) Curr Genet 16:187–194
Schinkel AH, Koerkamp MJAG, Tabak HF (1988) EMBO J 7:3255–3262
Tudzynski P, Düvell A, Esser K (1983) Curr Genet 7:145–150
Vierula PJ, Cheng CK, Court DA, Humphrey RW, Thomas DY, Bertrand H (1990) Curr Genet 17:195–201
Zabala G, Walbot V (1988) Mol Gen Genet 211:386–392
Zabala G, O'Brien-Vedder C, Walbot V (1987) Proc Natl Acad Sci USA 84:7861–7865
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Gessner-Ulrich, K., Tudzynski, P. Transcripts and translation products of a mitochondrial plasmid of Claviceps purpurea . Curr Genet 21, 249–254 (1992). https://doi.org/10.1007/BF00336849
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DOI: https://doi.org/10.1007/BF00336849