Summary
The mRNA for surface proteins from the antigenic type 51D of Paŕamecium tetraurelia was used to identify genomic DNA clones containing complementary sequences. When restriction maps were constructed for three type D genomic clones it became evident that the least two classes of paramecium DNA inserts were present, with clones λSD-3 and λSD-2 representing one class, and λSD-1 representing the other class. The transcribed regions within the inserts were mapped for all three clones. The orientation of transcription was determined for clones λSD-1 and λSD-3. S1 protection experiments revealed the ends of transcription for clone λSD-3. The entire transcribed region of this clone included about 7.5 kb of the insert. The transcribed region of λSD-1, however, appeared to be much larger than expected. In addition to their strong homologies to 51D RNA the two classes of clones (investigated in detail for λSD-1 and λSD-3) showed a strong DNA-DNA crossreaction. There was no evidence for DNA rearrangements when restriction enzyme digests of DNA from cultures of paramecia with active and inactive 51D genes were probed with DNA from these clones. It was concluded that λSD-3 corresponded to the 51D gene, and that λSD-1 represented a strongly related but unknown gene or a pseudogene.
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References
Benton WD, Davis RW (1977) Screening λgt recombinant clones by hybridization to single plaques in situ. Science 196:180–182
Berk AJ, Sharp PA (1977) Sizing and mapping of early adenovirus mRNAs by gel electrophoresis of S1 endonuclease-digested hybrids. Cell 12:721–732
Caron F, Meyer E (1982) Does Paramecium primaurelia use a different genetic code in its macronucleus? Nature 314:185–188
Epstein LW, Forney JD (1984) Mendelian and non-mendelian mutations affecting surface antigen expression in Paramecium tetraurelia. Mol Cell Biol 4:1583–1590
Favaloro J, Treisman G, Kamen R (1980) Transcription maps of polyoma virus-specific RNA: Analysis by two-dimensional S1 gel mapping. Methods Enzymol 65:718–749
Finger I (1974) Surface antigens of Paramecium aurelia. In: Wagtendonk WJ (ed) Paramecium, a current survey. Elsevier, New York, pp 121–164
Forney JD, Epstein LM, Preer LB, Rudman BM, Widmayer DJ, Klein WH, Preer JR, Jr (1983) Structure and expression of genes for surface proteins in Paramecium. Mol Cell Biol 3:466–474
Godiska R (1987) Structure and sequence of the H surface protein gene of Paramecium and comparison with related genes. Mol Gen Genet 208:529–536
Maniatis T, Fritsch EF, Sambrook J (1982) Molecular cloning, a laboratory manual. Cold Spring Harbor Laboratory Publications, New York
Meyer E, Caron F, Guiard B (1984) Blocking of in vitro translation of paramecium messenger RNAs is due to messenger primary structure. Biochimie 66:403–432
Meyer E, Caron F, Barion A (1985) Macronuclear structure of the G surface antigen gene of Paramecium primaurelia and direct expression of its repeated epitopes in Escherichia coli. Mol Cell Biol 5:2414–2422
Prat A, Katinka M, Caron F, Meyer E (1986) Nucleotide sequence of the Paramecium primaurelia G surface protein. A huge protein with a highly periodic structure. J Mol Biol 189:47–60
Preer JR, Jr (1969) Genetics of protozoa. In: Chen TT (ed) Research in protozoology. Pergamon Press, Oxford, pp 139–288
Preer JR, Jr (1986) Surface antigens of Paramecium. In: Gall JG (ed) Molecular biology of the ciliated protozoa. Academic Press, New York, pp 301–339
Preer JR, Jr, Preer LB, Rudman BM (1981) mRNAs for the immobilization antigens of Paramecium. Proc Natl Acad Sci USA 78:6776–6778
Preer JR, Jr, Preer LB, Rudman BM, Barnett AJ (1985) Deviation from the universal code shown by the gene for surface protein 51A in Paramecium. Nature 314:188–190
Preer JR, Jr, Preer LB, Rudman BM, Barnett A (1987) Molecular biology of the genes for immobilization antigens in Paramecium. J Protozool (in press)
Schmidt HJ (1983) Identification of the immobilization antigens of Paramecium by their cyanogen bromide cleavage patterns. J Protozool 30:577–580
Schmidt HJ (1987) Immobilization antigens of Paramecium. In: Görtz H-D (ed) Paramecium. Springer, Berlin Heidelberg New York Tokyo (in press)
Smith HO, Birnstiel ML (1976) A simple method for DNA restriction site mapping. Nucleic Acids Res 3:2387
Sommerville J (1970) Serotype expression in Paramecium. Adv Microbiol Physiol 4:131–178
Sonneborn TM (1943) Acquired immunity to specific antibodies and its inheritance in P. aurelia. Proc Indiana Acad Sci 52:190–191
Sonneborn TM (1950) Methods in the general biology and genetics of P. aurelia. J Exp Zool 113:87–143
Sonneborn TM (1975) Paramecium aurelia. In: King RC (ed) Handbook of genetics, vol 2. Plenum Press, New York, pp 469–594
Southern EM (1975) Detection of specific sequence among DNA fragments separated by gel electrophoresis. J Mol Biol 98:503–517
Steinbrück G (1983) Overamplification of genes in macronuclei of hypotrichous ciliates. Chromosoma 88:156–163
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Communicated by B.J. Kilby
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Schmidt, H.J. Characterization and comparison of genomic DNA clones containing complementary sequences to mRNA from serotype 51D of Paramecium tetraurelia . Mol Gen Genet 208, 450–456 (1987). https://doi.org/10.1007/BF00328138
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DOI: https://doi.org/10.1007/BF00328138