Structure of the gene encoding potato cytosolic pyruvate kinase

  • Cole K
  • Blakeley S
  • Dennis D
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Abstract

The polymerase chain reaction (PCR) has been used to generate a series of overlapping genomic clones representing 43 bp of 5′ untranslated sequence, 63 bp of 3′ untranslated sequence and the entire coding sequence of the gene encoding potato cytosolic pyruvate kinase (PKc). This portion of the gene is approximately 4.5 kb in length and is interrupted by three introns, one of which is present in the 5′ untranslated region. Southern blot analysis indicates that PKcis encoded by a small gene family, and sequence data from a number of PCR-derived genomic clones indicate that there are as many as six PKcgenes. Sequence differences between the PCR-generated genomic clones and a PKccDNA clone are discussed with respect to the fidelity of Taq polymerase. An alignment ofintron placement in the potato PKcgene with intron placement in PK genes from other sources indicates that two of the potato introns correspond to intron positions in other species. © 1992.

Author-supplied keywords

  • PCR
  • gene family
  • gene structure
  • plants
  • recombinant DNA

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Authors

  • K. P. Cole

  • S. D. Blakeley

  • D. T. Dennis

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